Crystallographic orientation dependence of deformation-induced martensitic transformation of 1.3 GPa-class 0.6 %C bainitic steel with retained austenite
Crystallographic orientation dependence of deformation-induced martensitic transformation of 1.3 GPa-class 0.6 %C bainitic steel with retained austenite
复制标题
结晶%20取向%20依赖性%20of%20变形诱导%20马氏体%20相变%20of%201.3%20GPa级%200.6%20%C%20贝氏体%20钢%20with%20保留%20奥氏体
DOI：
10.1016/j.scriptamat.2020.113666
复制
发表时间：
2021
影响因子：
6
通讯作者：
Inoue Tadanobu
中科院分区：
文献类型：
--
作者：
Ueji Rintaro;Shibata Akinobu;Ushioda Kohsaku;Kimura Yuuji;Ohmura Takahito;Inoue Tadanobu
研究了 0.6%C 合金钢中残余奥氏体稳定性对变形诱发马氏体转变的晶体取向依赖性。通过等温淬火成功获得了残余奥氏体体积分数约为40%的贝氏体组织。室温拉伸测试显示其具有 1.3 GPa 的高强度和足够的伸长率。测量了几个应变的拉伸变形所带来的残余奥氏体织构的变化。变形诱发的马氏体转变优先发生在拉伸轴几乎平行于<001>面心立方的晶粒中。马氏体转变的取向依赖性与{1-11}fcc<121>fcc剪切变形的取向依赖性兼容，后者可以被视为Bogers和Burgers提出的马氏体转变的第一个原始过程。这种兼容性是根据转变位错作用于晶格变化的弹性归一化施密德因子来讨论的。
The crystallographic orientation dependence of the stability of retained austenite against deformation-induced martensitic transformation in 0.6 %C alloyed steel was studied. A bainite structure with about 40 % volume fraction of retained austenite was successfully obtained by austempering. Tensile testing at room temperature revealed a high strength of 1.3 GPa with adequate elongation. A change in texture of retained austenite brought about by tensile deformation to several strains was measured. Deformation-induced martensitic transformation occurred preferentially in grains with the tensile axis nearly parallel to <001>fcc. The orientation dependence of the martensitic transformation was compatible with that of the {1-11}fcc<121>fccshear deformation which can be regarded as the first primitive process for the martensitic transformation as proposed by Bogers and Burgers. This compatibility is discussed in terms of the elastically normalized Schmid factor for the transformation dislocation to act for the lattice change.