scholarly journals Effect of martensite pre-quenching on bainite transformation kinetics, martensite/bainite duplex microstructures, mechanical properties and retained austenite stability of GCr15 bearing steel

2021 ◽  
Vol 15 ◽  
pp. 2429-2438
Author(s):  
Xiaohui Lu ◽  
Zhihao Yang ◽  
Dongsheng Qian ◽  
Jian Lan ◽  
Lin Hua
Keyword(s):  
Mechanical Properties ◽  
Retained Austenite ◽  
Bearing Steel ◽  
Transformation Kinetics ◽  
Bainite Transformation ◽  
Austenite Stability ◽  
Retained Austenite Stability ◽  
Gcr15 Bearing Steel

Effect of Retained Austenite Stability on Mechanical Properties of Bainitic Rail Steel

2014 ◽  
Vol 1004-1005 ◽  
pp. 198-202 ◽  
Author(s):  
Kai Kai Wang ◽  
Zhun Li Tan ◽  
Gu Hui Gao ◽  
Xiao Lu Gui ◽  
Bing Zhe Bai
Keyword(s):  
Mechanical Properties ◽  
Impact Toughness ◽  
Retained Austenite ◽  
Rail Steel ◽  
High Impact ◽  
Good Thermal Stability ◽  
Austenite Stability ◽  
Retained Austenite Stability ◽  
Close Relationship ◽  
The Stability

Retained austenite has an important effect on strength and toughness of 20Mn2SiCrMo bainitic rail steel. In this work, the stability of retained austenite and mechanical properties have been studied. The results show that impact toughness of experimental steel has close relationship with the stability of retained austenite. When tempered at lower than 350°C, retained austenite owns good thermal stability, corresponding to relatively high impact toughness.

Effect of Retained Austenite Stability on Mechanical Properties of 590MPa Grade TRIP Sheet Steels

2010 ◽  
Vol 638-642 ◽  
pp. 3374-3379 ◽  
Author(s):  
Hiroshi Matsuda ◽  
Hisata Noro ◽  
Yasunobu Nagataki ◽  
Yoshihiro Hosoya
Keyword(s):  
Mechanical Properties ◽  
Carbon Content ◽  
Retained Austenite ◽  
High Strain ◽  
Sheet Steels ◽  
Trip Steels ◽  
Austenite Stability ◽  
Retained Austenite Stability ◽  
The Stability ◽  
High Work

Industrial low alloy TRIP sheet steels contain blocky and lath-shaped retained austenite. In the present study, transformation behaviour of blocky and lath-shaped retained austenite during straining was investigated to clarify its effect on mechanical properties. Two types of TRIP steels containing almost the same amount but the different morphology of retained austenite were used. A steel containing large amount of lath-shaped retained austenite exhibits superior ductility, and sustains high work-hardenability in a high strain region. On the contrast, a steel containing large amount of blocky retained austenite exhibits low ductility. 　The work-hardenability increased steeply to the maximum at a low strain region, and then reduced in a high strain region. The stability of the blocky austenite has been found to be poor with respected to martensite transformation. The lath-shaped retained austenite remains until a high strain region whereas the blocky retained austenite transformed into martensite in a low strain region. Carbon content was higher in the lath-shaped retained austenite than in the blocky retained austenite. Stability of retained austenite is, however, inexplicable only by the carbon content, and would be affected by the different morphology and the resulting restraint conditions.

Effects of Retained Austenite Stability on Mechanical Properties of High Strength TRIP Steel

2012 ◽  
Vol 602-604 ◽  
pp. 287-293
Author(s):  
Zhi Feng Li ◽  
Ren Yu Fu ◽  
Qing Shan Li
Keyword(s):  
Mechanical Properties ◽  
Trip Steel ◽  
Retained Austenite ◽  
Mechanical Stability ◽  
High Strength ◽  
Tensile Tests ◽  
Transformation Kinetics ◽  
Austenite Stability ◽  
Kinetics Of ◽  
Strength And Ductility

Mechanical stability of retained austenite and its effect on mechanical properties of high strength TRIP steel were studied by means of OM, SEM, TEM, XRD, and mechanical testing after various heat treatments. Results revealed that the film-type retained austenite located between bainite laths with high carbon content showed gradual martensitic transformation with strain, demonstrating a good TRIP effect. Samples annealed at 800°C and held at 420°C showed an optimum value of strength and ductility product up to 18381.2MPa%. Transformation kinetics of the retained austenite were evaluated through tensile tests and fitted by the function y=0.86-0.86×exp(-Ax). The fitting results were good.

Low-alloy TRIP steels: a correlation between mechanical properties and the retained austenite stability

2002 ◽  
Vol 73 (6-7) ◽  
pp. 249-252 ◽  
Author(s):  
Apostolos N. Vasilakos ◽  
Joachim Ohlert ◽  
Katerina Giasla ◽  
Gregory N. Haidemenopoulos ◽  
Wolfgang Bleck
Keyword(s):  
Mechanical Properties ◽  
Retained Austenite ◽  
Trip Steels ◽  
Austenite Stability ◽  
Retained Austenite Stability
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