A Tension Observation and Fracture Mechanics of TRIP Steel

摘要：

Stress-induced transformation of retained austenite to martensite has been investigated using in-situ tensile test. Moreover,EBSD technique has been used to analyze distribution and stability of retained austenite in this paper. Fine retained austenite was detected and matrix in the ferrite was more stable. Coupled with transformation,fracture was postponed and stress relaxation was found. In the deformation process,slip band has been found in inner ferrite and it had a direction of 45° to the tensile stress. Crack origin firstly appeared in the Vgap and inclusions,then expanded and connected. The trend of crack often generates break,namely the crack passivated by the transformation of retained austenite to martensite.

关键词： TRIP steel fracture mechanism in-situ tensile retained austenite EBSD

作者: Jianq Haitao Tanq Di Ding Wei Li Qiang

作者单位: National Engineering Research Center for Advanced Rolling Technology,University of Science and Technology Beijing,Beijing 100083,China

会议类型: 国际会议

会议名称: 2009 International Symposium on Automobile Steel(2009年汽车用钢生产及应用技术国际研讨会)

会议地点: 大连

会议语种:英文

页码: 222-226

在线出版日期: 2009-09-06（万方平台首次上网日期，不代表论文的发表时间）