Texture evolution and slip mode of a Ti-5.5Mo-7.2Al-4.5Zr-2.6Sn-2.1Cr dual-phase alloy during cold rolling based on multiscale crystal plasticity finite element model  

作　　者：Duoduo Wang Qunbo Fan Xingwang Cheng Yu Zhou Ran Shi Yan Qian Le Wang Xinjie Zhu Haichao Gong Kai Chen Jingjiu Yuan Liu Yang 

机构地区：[1]National Key Laboratory of Science and Technology on Materials Under Shock and Impact,School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China [2]Beijing Institute of Technology Chongqing Innovation Center,Chongqing 401135,China [3]Microstructure and Properties of Materials(IEK-2),Forschungszentrum Jülich,Jülich,Germany [4]Chengdu Advanced Metal Materials Industrial Technology Research Institute Co.Ltd,Chengdu 610000,China

出　　处：《Journal of Materials Science & Technology》2022年第16期76-87,共12页材料科学技术（英文版）

基　　金：financially supported by the Natural Science Foundation of Chongqing(No.Cstc2020jcyj-msxmX0094);the Joint Research Programs between Belarusian Republican Foundation for Fundamental Research and Beijing Institute of Technology"BRFFR-BIT-2020(No.BITBLR2020004)。

摘　　要：The complex micromechanical response among grains remains a persistent challenge to understand the deformation mechanism of titanium alloys during cold rolling.Therefore,in this work,a multiscale crystal plasticity finite element method of dual-phase alloy was proposed and secondarily developed based on LS-DYNA software.Afterward,the texture evolution and slip mode of a Ti-5.5Mo-7.2Al-4.5Zr-2.6Sn-2.1Cr alloy,based on the realistic 3D microstructure,during cold rolling(20%thickness reduction)were systematically investigated.The relative activity of the■slip system in theαphase gradually increased,and then served as the main slip mode at lower Schmid factor(<0.2).In contrast,the contribution of the■slip system to the overall plastic deformation was relatively limited.For theβphase,the relative activity of the<111>{110}slip system showed an upward tendency,indicating the important role of the critical resolved shear stress relationship in the relative activity evolutions.Furthermore,the abnormally high strain of very fewβgrains was found,which was attributed to their severe rotations compelled by the neighboring pre-deformedαgrains.The calculated pole figures,rotation axes,and compelled rotation behavior exhibited good agreement to the experimental results.

关 键 词：Titanium alloy Multiscale crystal plasticity finite element model Texture evolution Slip mode 

分 类 号：TG339[金属学及工艺—金属压力加工]