Effect on Temperature Dependence of Deformation Mechanism in a Medium Mn-TRIP Steel
The effect of temperature on tensile behavior of a medium Mn-TRIP steel was investigated due to the importance of formability of medium Mn high strength steels.With the deform temperature increasingfrom 25℃ to 200℃,the tensile strength decreased and the total elongation first increased and then decreased.It was found that under these temperatures the stability of austenite became higher due to the increasing chemical driving force for martensite transformation.With increasing strain,ferrite and austenite were unable to retain sustainable hardening.Therefore,the strain softening curred quickly.Based on calculation,by making the grain coarse,austenite became less stable,which resulted in different tensile behaviors.Through the experiment,it is concluded that in Mn-TRIP steels the TRIP effect from austenite should coordinate the deformation of ferrite so as to attain superior mechanical properties.
medium Mn-TRIP steel mechanical properties EBSD stability of austenite deformation mechanism
LUO Lianbo LI Wei WANG Li ZHOU Shu JIN Xuejun
State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao State Key Lab of Development and Application Technology of Automotive Steels,Baosteel Research Insti
国际会议
成都
英文
91-94
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）