Simulation of isothermal precision extrusion of NiTi shape memory alloy pipe coupling by combining finite element method with cellular automaton

作     者：ZHANG Yan-qiu JIANG Shu-yong ZHAO Ya-nan ZHU Xiao-ming 张艳秋;江树勇;赵亚楠;朱晓明

作者机构：College of Mechanical and Electrical Engineering Harbin Engineering University Harbin 150001 China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2017年第24卷第3期

页      面：506-514页

核心收录：

学科分类：08[工学] 082303[工学-交通运输规划与管理] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 082302[工学-交通信息工程及控制] 0823[工学-交通运输工程] 

基　　金：Projects(51305091,51475101)supported by the National Natural Science Foundation of China Project(20132304120025)supported by Specialized Research Fund for the Doctoral Program of Higher Education,China 

主　　题：shape memory alloy dynamic recrystallization cellular automaton finite element method extrusion 

摘      要：In order to present the microstructures of dynamic recrystallization(DRX) in different deformation zones of hot extruded NiTi shape memory alloy(SMA) pipe coupling,a simulation approach combining finite element method(FEM) with cellular automaton(CA) was developed and the relationship between the macroscopic field variables and the microscopic internal variables was *** results show that there exists a great distinction among the microstructures in different zones of pipe coupling because deformation histories of these regions are *** plastic deformation may result in fine recrystallized grains,whereas the recrystallized grains may grow very substantially if there is a rigid translation during the deformation,even if the final plastic strain is very *** a consequence,the deformation history has a significant influence on the evolution path of the DRX as well as the final microstructures of the DRX,including the morphology,the mean grain size and the recrystallization fraction.