3
Adventures in the Physical Metallurgy of Steels
http://sms.cam.ac.uk/collection/1586369
Proceedings of a conference held in Cambridge to highlight the most adventurous and risky topics in the physical metallurgy of steels.
1440
2013
Tue, 29 Oct 2013 09:02:10 +0000
Sun, 27 Oct 2013 13:31:18 +0000
en
smssupport@uis.cam.ac.uk
Adventures in the Physical Metallurgy of Steels
http://sms.cam.ac.uk/collection/1586369
http://rss.sms.cam.ac.uk/itunesimage/1586370.jpg
http://video.search.yahoo.com/mrss
Adventures in the Physical Metallurgy of Steels
Proceedings of a conference held in Cambridge to highlight the most adventurous and risky topics in the physical metallurgy of steels.
Adventures in the Physical Metallurgy of Steels
Proceedings of a conference held in Cambridge to highlight the most adventurous and risky topics in the physical metallurgy of steels.
Cambridge University
Professor H.K.D.H. Bhadeshia
hkdb@cam.ac.uk
http://sms.cam.ac.uk/collection/1586369
Adventures in the Physical Metallurgy of Steels
20131027T13:31:18+00:00
MET
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Adventures in the Physical Metallurgy of Steels
ucs_sms_1586369_1586371
http://sms.cam.ac.uk/media/1586371
Adventures in the Physical Metallurgy of Steels
A meeting dealing with some of the most adventurous topics in the physical metallurgy of steels
Sun, 27 Oct 2013 13:48:28 +0000
steel,metallurgy,physical metallurgy,bainite,martensite
University of Cambridge
Professor H.K.D.H. Bhadeshia
4e25ca6dd3c41ec0e843310bc587c913
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A meeting dealing with some of the most adventurous topics in the physical...
A meeting dealing with some of the most adventurous topics in the physical metallurgy of steels
Cambridge University
937
steel,metallurgy,physical metallurgy,bainite,martensite
http://sms.cam.ac.uk/media/1586371
Adventures in the Physical Metallurgy of Steels
A meeting dealing with some of the most adventurous topics in the physical metallurgy of steels
Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University, by Harry Bhadeshia
http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
20131027T13:51:25+00:00
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Architectured steels
ucs_sms_1586369_1586393
http://sms.cam.ac.uk/media/1586393
Architectured steels
Design of artificial composites on a micrometre scale
Sun, 27 Oct 2013 13:59:17 +0000
University of Cambridge
Professor H.K.D.H. Bhadeshia
29105cf18ceaf45fff56ab54d3ead76e
56f66db5bc4fd45db82ec65be840969b
d3d3f8086d2478cbee00049dca1be373
Design of artificial composites on a micrometre scale
Design of artificial composites on a micrometre scale
Cambridge University
1969
http://sms.cam.ac.uk/media/1586393
Architectured steels
Design of artificial composites on a micrometre scale
A lecture given by Toshihiko Koseki, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. Multilayered steels are described, including the theoretical framework for the design of such composites. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Abstract
Traditionally, physical metallurgy concerns microstructureproperty correlation. In this approach, microstructure evolves as the product of interactions between composition and process parameters controlled by the thermodynamic and kinetic conditions. Attributes concerning the property are obtained as the function of volume fraction, size, shape and distribution of the constituent phases, usually described through empirical relations or even on the basis of imprecise knowledge. Hence, the approach is more evolutionary than constructive. Performance driven construction of the microstructure demands precise response and interaction of microstructural constituents under the given loading condition. An architecturally designed microstructure implies planning, design and construction of microstructure considering nature, size, morphology and distribution of the constituent phases on a suitably conceived topological framework. With the aforesaid ambition, an attempt has been proposed on construction of the ferritemartensite microstructure, based on isostrain architecture, aiming at maximum work hardening. In another attempt, the mechanical response of a topologically designed bimodal microstructure in single phase steel has been evaluated for maximizing the strengthductility combination.
20131027T13:59:48+00:00
1969
1586393
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Crystallographic variant selection: APMS conference
ucs_sms_1586369_1586497
http://sms.cam.ac.uk/media/1586497
Crystallographic variant selection: APMS conference
A lecture given by Saurabh Kundu, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. Theory for the selection of specific crystallographic variants out of all possible variant, when steel is transformed into bainite, martensite or in general, displacive phase transformation products. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Sun, 27 Oct 2013 15:35:10 +0000
martensite,bainite,metallurgy,steels,crystallography,variant selection,transformation plasticity
University of Cambridge
Professor H.K.D.H. Bhadeshia
897b33616e831725d68fd0910dec8525
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A lecture given by Saurabh Kundu, at the Adventures in the Physical Metallurgy...
A lecture given by Saurabh Kundu, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. Theory for the selection of specific crystallographic variants out of all possible variant, when steel is transformed into bainite, martensite or in general, displacive phase transformation products. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Cambridge University
1609
martensite,bainite,metallurgy,steels,crystallography,variant selection,transformation plasticity
http://sms.cam.ac.uk/media/1586497
Crystallographic variant selection: APMS conference
A lecture given by Saurabh Kundu, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. Theory for the selection of specific crystallographic variants out of all possible variant, when steel is transformed into bainite, martensite or in general, displacive phase transformation products. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Variant selection during displacive transformation is popularly monitored by assessing the pole figure or ODF of the bulk texture or pole figures from single prior austenite grains and also by measuring the physical orientation of α' plates in the microstructure. However it is known that when variant selection occurs the shear strain associated with each α' plate does not get fully cancelled and it is reflected in the measured transformation strain. We have shown in this work that transformation strain is the most reliable measure for the variant selection. Mathematical models have already been developed to calculate the transformation strain under various loading conditions, and to support the same extensive experiments have been done to show how externally applied stress and plastic strain can affect the transformation strain. This data is used to describe the extent of variant selection which is further supported by EBSD results. Interesting observations has also been made on the nature of the strain during transformation. Finally mathematical models have been developed to show that variant selection has negligible influence on physical orientation of α'plates when transformation occurs under external stress only, but prior plastic deformation can change the orientation to a great extent.
20131027T15:35:42+00:00
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Isotropic steel: APMS conference
ucs_sms_1586369_1587625
http://sms.cam.ac.uk/media/1587625
Isotropic steel: APMS conference
A lecture given by Peter Olund, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. With the focus on steels for bearings, he talks about the role of inclusions in determining the anisotropy of fatigue properties, and of sampling volume effects. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
The demands of high cleanliness steel constantly increases due to the fact that higher loads are being introduced in the applications. Today there are cases where the elongated sulphide inclusions present in steel with "normal" sulphur content (around 80ppm) will cause premature fatigue failures. A clear trend is therefore reduced sulphur contents in airmelted steels. However, only increasing the desulphurization within the current process window, to produce low sulphur contents (less than 20ppm), will due to thermodynamics drastically increase the number and size of detrimental globular calcium aluminates. Remelting process has therefore dominated the market for low sulphur steel. Recently, airmelt steel making processes have been developed to produce more isotropic low sulphur steel where the formation of large globular calcium alumina is thermodynamically suppressed. Consequently, steels produced with this process will exhibit more isotropic fatigue properties.
In this work fatigue properties has been assessed for steels loaded in different directions with reference to the rolling direction for steels with different level of isotropy. Furthermore, the effect on operation temperature has been taking into account showing that moderate increases in temperature will affect the properties. This influence can be correlated to the microstructural stability, i.e. composition and structure, of the steel.
Tue, 29 Oct 2013 09:01:40 +0000
steel,bearing steel,inclusion control,inclusions,physical metallurgy,anisotropic properties of steels
University of Cambridge
Professor H.K.D.H. Bhadeshia
e5dd1683b9ed2315204aa064edf2623b
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A lecture given by Peter Olund, at the Adventures in the Physical Metallurgy of...
A lecture given by Peter Olund, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. With the focus on steels for bearings, he talks about the role of inclusions in determining the anisotropy of fatigue properties, and of sampling volume effects. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
The demands of high cleanliness steel constantly increases due to the fact that higher loads are being introduced in the applications. Today there are cases where the elongated sulphide inclusions present in steel with "normal" sulphur content (around 80ppm) will cause premature fatigue failures. A clear trend is therefore reduced sulphur contents in airmelted steels. However, only increasing the desulphurization within the current process window, to produce low sulphur contents (less than 20ppm), will due to thermodynamics drastically increase the number and size of detrimental globular calcium aluminates. Remelting process has therefore dominated the market for low sulphur steel. Recently, airmelt steel making processes have been developed to produce more isotropic low sulphur steel where the formation of large globular calcium alumina is thermodynamically suppressed. Consequently, steels produced with this process will exhibit more isotropic fatigue properties.
In this work fatigue properties has been assessed for steels loaded in different directions with reference to the rolling direction for steels with different level of isotropy. Furthermore, the effect on operation temperature has been taking into account showing that moderate increases in temperature will affect the properties. This influence can be correlated to the microstructural stability, i.e. composition and structure, of the steel.
Cambridge University
1873
steel,bearing steel,inclusion control,inclusions,physical metallurgy,anisotropic properties of steels
http://sms.cam.ac.uk/media/1587625
Isotropic steel: APMS conference
A lecture given by Peter Olund, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. With the focus on steels for bearings, he talks about the role of inclusions in determining the anisotropy of fatigue properties, and of sampling volume effects. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
The demands of high cleanliness steel constantly increases due to the fact that higher loads are being introduced in the applications. Today there are cases where the elongated sulphide inclusions present in steel with "normal" sulphur content (around 80ppm) will cause premature fatigue failures. A clear trend is therefore reduced sulphur contents in airmelted steels. However, only increasing the desulphurization within the current process window, to produce low sulphur contents (less than 20ppm), will due to thermodynamics drastically increase the number and size of detrimental globular calcium aluminates. Remelting process has therefore dominated the market for low sulphur steel. Recently, airmelt steel making processes have been developed to produce more isotropic low sulphur steel where the formation of large globular calcium alumina is thermodynamically suppressed. Consequently, steels produced with this process will exhibit more isotropic fatigue properties.
In this work fatigue properties has been assessed for steels loaded in different directions with reference to the rolling direction for steels with different level of isotropy. Furthermore, the effect on operation temperature has been taking into account showing that moderate increases in temperature will affect the properties. This influence can be correlated to the microstructural stability, i.e. composition and structure, of the steel.
The demands of high cleanliness steel constantly increases due to the fact that higher loads are being introduced in the applications. Today there are cases where the elongated sulphide inclusions present in steel with "normal" sulphur content (around 80ppm) will cause premature fatigue failures. A clear trend is therefore reduced sulphur contents in airmelted steels. However, only increasing the desulphurization within the current process window, to produce low sulphur contents (less than 20ppm), will due to thermodynamics drastically increase the number and size of detrimental globular calcium aluminates. Remelting process has therefore dominated the market for low sulphur steel. Recently, airmelt steel making processes have been developed to produce more isotropic low sulphur steel where the formation of large globular calcium alumina is thermodynamically suppressed. Consequently, steels produced with this process will exhibit more isotropic fatigue properties.
In this work fatigue properties has been assessed for steels loaded in different directions with reference to the rolling direction for steels with different level of isotropy. Furthermore, the effect on operation temperature has been taking into account showing that moderate increases in temperature will affect the properties. This influence can be correlated to the microstructural stability, i.e. composition and structure, of the steel.
20131029T09:02:10+00:00
1873
1587625
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Magnetostructural coupling: APMS conference
ucs_sms_1586369_1586411
http://sms.cam.ac.uk/media/1586411
Magnetostructural coupling: APMS conference
A lecture given by Igor Abrikosov, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. The emphasis is on how magentic properties play a role in the properties of iron. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Sun, 27 Oct 2013 14:11:57 +0000
first principles calculations,ab inito methods,steels,physical metallurgy,APMS,ferromagnetism
University of Cambridge
Professor H.K.D.H. Bhadeshia
54e9aade8704726159f6540c2f068aaa
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A lecture given by Igor Abrikosov, at the Adventures in the Physical Metallurgy...
A lecture given by Igor Abrikosov, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. The emphasis is on how magentic properties play a role in the properties of iron. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Cambridge University
2166
first principles calculations,ab inito methods,steels,physical metallurgy,APMS,ferromagnetism
http://sms.cam.ac.uk/media/1586411
Magnetostructural coupling: APMS conference
A lecture given by Igor Abrikosov, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. The emphasis is on how magentic properties play a role in the properties of iron. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Ab initio simulations based on the Density Functional Theory (DFT) are known as a useful tool for prediction of materials properties and for their understanding. In this talk we review recent progress in applications of DFT for Febased alloys. We underline a necessity to take into account explicitly temperature induced magnetic excitations. We show that magnetic and chemical interaction in Febased alloys are deeply interconnected, and strongly affect each other. We start with relatively simple examples, and show that there exists very strong dependence of thermodynamic properties, like elastic constants, structural distortions, and mixing enthalpies, on the underlying magnetic state in Fe alloys with Cr, Mn, Ni, V, Nb, C, and N. We then show that effective chemical interactions in steels can be tuned by its global magnetic state, which opens exciting possibilities for materials synthesis. Using firstprinciples theory we demonstrate that in FeSi system the magnetic disorder at high temperatures favour a formation of cubic Fe2Si phase with B2 crystal structure, which is not present in the alloy phase diagram. The experiment confirms the theoretical predictions, and the B2 Fe2Si alloy is synthesized from FeSi mixture using multianvil press.
20131027T14:12:29+00:00
2166
1586411
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16x9
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Quenching and partitioning; APMS conference
ucs_sms_1586369_1586457
http://sms.cam.ac.uk/media/1586457
Quenching and partitioning; APMS conference
A lecture given by John Speer, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. The quench and partitioning process involves partial transformation to martensite, followed by an increase in temperature to permit the excess carbon to partition into the residual austenite. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Sun, 27 Oct 2013 15:20:24 +0000
quenching and partitioning,steel,metallurgy,physical metallurgy,martensite,bainite,automotive steels
University of Cambridge
Professor H.K.D.H. Bhadeshia
c86794a03bf6a488e667ab399176d607
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A lecture given by John Speer, at the Adventures in the Physical Metallurgy of...
A lecture given by John Speer, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. The quench and partitioning process involves partial transformation to martensite, followed by an increase in temperature to permit the excess carbon to partition into the residual austenite. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Cambridge University
1986
quenching and partitioning,steel,metallurgy,physical metallurgy,martensite,bainite,automotive steels
http://sms.cam.ac.uk/media/1586457
Quenching and partitioning; APMS conference
A lecture given by John Speer, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. The quench and partitioning process involves partial transformation to martensite, followed by an increase in temperature to permit the excess carbon to partition into the residual austenite. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
The quenching and partitioning (Q&P) concept was first introduced about a decade ago, to utilise carbon in asquenched martensite to stabilise retained austenite and thereby enhance the mechanical properties. This presentation will provide an update of advancements made in understanding important aspects of physical metallurgy and microstructure development, within the authors laboratories and elsewhere, which have led to interest in Q&P as a potential route for producing commercial steels in volume. A variety of applications have been explored in Q&P laboratory investigations. Initial industrialisation has focused on automotive sheet steels, and substantial activity is now underway to meet aggressive nearterm targets for vehicle lightweighting using Q&P steels or other novel approaches to generate microstructures with enhanced austenite fractions. The current status of some of these efforts will be reported.
20131027T15:20:54+00:00
1986
1586457
true
16x9
false
no

Secondary hardened bainite: APMS conference
ucs_sms_1586369_1586518
http://sms.cam.ac.uk/media/1586518
Secondary hardened bainite: APMS conference
A lecture given by Jer Ren Yang, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. The metallurgy of a new, microalloyed bainitic steel that is capable of secondary hardening, accompanied by a simultaneous increase in strength and ductility is introduced. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Sun, 27 Oct 2013 15:53:08 +0000
bainite,steel,metallurgy,secondary hardening,carbides
University of Cambridge
Professor H.K.D.H. Bhadeshia
3c1969d5822c224ee99f659fa2191fa6
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A lecture given by Jer Ren Yang, at the Adventures in the Physical Metallurgy...
A lecture given by Jer Ren Yang, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. The metallurgy of a new, microalloyed bainitic steel that is capable of secondary hardening, accompanied by a simultaneous increase in strength and ductility is introduced. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Cambridge University
1976
bainite,steel,metallurgy,secondary hardening,carbides
http://sms.cam.ac.uk/media/1586518
Secondary hardened bainite: APMS conference
A lecture given by Jer Ren Yang, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. The metallurgy of a new, microalloyed bainitic steel that is capable of secondary hardening, accompanied by a simultaneous increase in strength and ductility is introduced. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Ideally, a low carbon bainitic microstructure offers an excellent combination of good toughness, strength and weldability. The typical microstructure of lowcarbon bainitic steels is composed of a fine substructured bainitic ferrite matrix with certain amounts of uniformly distributed carbonrich second phases. These second phases, located among the sheaves of bainitc ferrite, consist basically of martensite/austenite (M/A) constituents. As a result of the lowangle character of boundaries of bainitic ferrite subunit within the sheaf structure, little or no evidence of ferrite boundaries could be detected by an optical microscope. It is worth further improving appreciation of the transformation and to evaluate the effect of substructure characteristics on the properties. The main purpose of this work was to investigate the effect of Mo addition on the development of microstructure in the hotrolled lowcarbon Nbcontaining bainitic steels. The steel strips were fabricated by the combined processes of controlledrolling and acceleratedcooling. Microstructural characterisation and mechanical testing for the corresponding strips have been investigated. The results show that the Mo addition has the advantage of producing a high volume fraction of bainite, which possesses a significant secondary hardening after tempering treatment. It is suggested that the secondary hardening effect provides an additional way to increase the strength of NbMocontaining bainitic steels.
20131027T15:53:39+00:00
1976
1586518
true
16x9
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Welding of high carbon steel: APMS conference
ucs_sms_1586369_1587604
http://sms.cam.ac.uk/media/1587604
Welding of high carbon steel: APMS conference
A lecture given by K. Fang, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. Nanostructured bainite is incredibly difficult to weld because of its high carbon concentration. Here an innovative method is presented to resolve the weldability. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Tue, 29 Oct 2013 08:55:08 +0000
superbainite,bainite,welding,high carbon steel,metallurgy,physical metallurgy,steels
University of Cambridge
Professor H.K.D.H. Bhadeshia
1609a40d59a563fa4d7546950b4e7c94
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A lecture given by K. Fang, at the Adventures in the Physical Metallurgy of...
A lecture given by K. Fang, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. Nanostructured bainite is incredibly difficult to weld because of its high carbon concentration. Here an innovative method is presented to resolve the weldability. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Cambridge University
1502
superbainite,bainite,welding,high carbon steel,metallurgy,physical metallurgy,steels
http://sms.cam.ac.uk/media/1587604
Welding of high carbon steel: APMS conference
A lecture given by K. Fang, at the Adventures in the Physical Metallurgy of Steels (APMS) conference held in Cambridge University. Nanostructured bainite is incredibly difficult to weld because of its high carbon concentration. Here an innovative method is presented to resolve the weldability. The presentation file can be downloaded from http://www.msm.cam.ac.uk/apms/
http://www.msm.cam.ac.uk/phasetrans
Highcarbon nanostructured bainite steel is very difficult to be well welded due to poor weldability. By adopting a new technology called regeneration treatment, the welded joint has similar microstructures and mechanical properities to base metal. The effect of regeneration time (0h120h) and temperature (230Â°C270Â°C) on microstructures and mechanical properities was also investigated.
Results show that microstructures in fusion and austenitised zones consist of two phases when regeneration time is long enough, which are nanoscale bainite ?lms separated by carbonâ€"enriched ?lms of retained austenite. However, volume fraction of retained austensite in fusion zone is a little lower than austenitised zone. With regeneration temperature increasing, volume fraction of retained austensite increases and thickness of slender platelets shows the same changing trend. The changes of microstructures have important effect on mechanical properities. By tensile and hardness test, the strength of fusion zone is lower than austenitised zone, but both increases with regeneration temperature decreasing while the elongation decreases. And the micro hardness increases when regeneration temperature decreasing. The strength of obtained welds reaches to as high as 1.72.1 GPa and corresponding hardness 550HV650 HV.
20131029T08:55:39+00:00
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1587604
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1586369