Continuum understanding of twin formation near grain boundaries of FCC metals with low stacking fault energy

作     者：Jaimyun Jung Jae Ik Yoon Jung Gi Kim Marat I.Latypov Jin You Kim Hyoung Seop Kim 

作者机构：Department of Materials Science and EngineeringPohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea GT-CNRS UMI 2958Georgia TechLorraine 57070 MetzFrance Pohang Research LaboratorySteel Products Research Group 1POSCOPohang 790-785Republic of Korea Center for High Entropy AlloysPohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea 

出 版 物：《npj Computational Materials》 (计算材料学（英文）)

年 卷 期：2017年第3卷第1期

页      面：275-283页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by POSCO(2015Y073) Brain Korea 21 PLUS project for Center for Creative Industrial Materials(F16SN25D1706) National Research Foundation of Korea(NRF)grant funded by the Korean government(MISP)(No.2014R1A2A1A10051322) 

主　　题：grain microstructure steel 

摘      要：Deformation twinning from grain boundaries is often observed in face-centered cubic metals with low stacking fault *** of the possible factors that contribute to twinning origination from grain boundaries is the intergranular interactions during ***,the influence of mechanical interaction among grains on twin evolution has not been fully *** spite of extensive experimental and modeling efforts on correlating microstructural features with their twinning behavior,a clear relation among the large aggregate of grains is still *** this work,we characterize the micromechanics of grain-to-grain interactions that contribute to twin evolution by investigating the mechanical twins near grain boundaries using a full-field crystal plasticity simulation of a twinning-induced plasticity steel deformed in uniaxial tension at room *** are first observed through electron backscatter diffraction technique to obtain data to reconstruct a statistically equivalent microstructure through synthetic microstructure ***-to-grain micromechanical response is analyzed to assess the collective twinning behavior of the microstructural volume element under tensile *** of the simulated results reveal that grain interactions are capable of changing the local mechanical behavior near grain boundaries by transferring strain across grain boundary or localizing strain near grain boundary.