Multiscale computational simulation of deformation behavior of TRIP steel with growth of martensitic particles in unit cell by asymptotic homogenization method
Multiscale computational simulation of deformation behavior of TRIP steel with growth of martensitic particles in unit cell by asymptotic homogenization method
复制标题
渐进均匀化法多尺度计算模拟晶胞内马氏体颗粒生长的 TRIP 钢变形行为
DOI：
10.1016/j.ijplas.2003.05.002
复制
发表时间：
2004
影响因子：
9.8
通讯作者：
T. Iwamoto
中科院分区：
文献类型：
--
作者：
T. Iwamoto
相变诱发塑性（TRIP）钢由于发生了应变诱发马氏体相变（SIMT），从而提高了强度、塑性和韧性。TRIP钢良好的力学性能可通过奥氏体和马氏体的SIMT行为与变形行为的适当结合来实现。然而，由于两个相的SIMT和变形行为强烈地依赖于工作环境的条件，例如温度、应变速率和应力系统，因此仅在相当受限的工作环境中获得期望的机械性能。另一方面，可以观察到不同尺寸、形状和取向的马氏体颗粒，并且在TRIP钢的显微组织中在空间上分布，因此，TRIP钢的机械性能可能强烈地表现出对马氏体的几何不均匀性和构型的依赖性。如果能控制马氏体的几何构型和不均匀性，就有望提高TRIP钢的力学性能。为了研究奥氏体基体中马氏体的几何构型和不均匀性对TRIP钢宏观变形行为的影响，采用均匀化技术对TRIP钢中椭球形马氏体颗粒嵌入奥氏体晶胞中心长大的变形行为进行了数值模拟。
Due to the strain-induced martensitic transformation (SIMT), the strength, ductility and toughness of TRIP (transformation-induced plasticity) steel are enhanced. Such favorable mechanical properties of TRIP steel can be realized by the appropriate combination of the SIMT behavior and deformation behavior of both austenite and martensite. However, since the SIMT and deformation behavior of both phases depend strongly on the conditions of the working environment such as temperature, strain rate and stress system, the desired mechanical properties are obtained only in a fairly restricted working environment. On the other hand, martensitic particles of various sizes, shapes and orientations can be observed and are distributed spatially in the microstructure of TRIP steel, therefore it is possible that the mechanical properties of TRIP steel strongly manifest a dependence on the geometrical inhomogeneity and configuration of martensite. If the geometrical configuration and inhomogeneity of martensite can be controlled, we can expect to enhance the mechanical properties of TRIP steel. Here, in order to investigate the effects of the geometrical configuration and inhomogeneity of martensite in the austenitic matrix on the macroscopic deformation behavior of TRIP steel, the computational simulation of the deformation behavior of TRIP steels with the growth of an ellipsoidal martensitic particle embedded in the center of the austenitic unit cell, is performed using the homogenization technique.