Microstructure and mechanical behavior of Mg-5Zn matrix influenced by particle deformation zone

作     者：Quan-xin Shi Cui-ju Wang Kun-kun Deng Kai-bo Nie Yucheng Wu Wei-min Gan Wei Liang Quan-xin Shi;Cui-ju Wang;Kun-kun Deng;Kai-bo Nie;Yucheng Wu;Wei-min Gan;Wei Liang

作者机构：Shanxi Key Laboratory of Advanced Magnesium-Based MaterialsCollege of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China Key Laboratory of Interface Science and Engineering in Advanced MaterialsMinistry of EducationTaiyuan University of TechnologyTaiyuan 030024China GMS at MLZHelmholtz-Zentrum GeesthachtGarchingGermany 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第60卷第1期

页      面：8-20页

核心收录：

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

基　　金：supported financially by the National Natural Science Foundation of China(Nos.51771128 and 51771129) the Shanxi Province Science and Technology Major Projects(No.20181101008) the Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi 

主　　题：PDZ size SiC_(p)/Mg-5Zn composites Work hardening behavior Softening In-situ tensile Neutron diffraction 

摘      要：The effect of particle deformation zone(PDZ) on the microstructure and mechanical properties of SiC_(p)/Mg-5Zn composites was ***,the work hardening and so ftening behavior of SiC_(p)/Mg-5Zn composites influenced by PDZ size were analyzed and discussed using neutron diffraction under in-situ tensile *** evolution of FWHM(full width at half maximum) extracted from the diffraction pattern of SiC_(p)/Mg-5Zn composites was used to interpret the modification of dislocation density during in-situ tension,which discovered the effect of dislocation on the work hardening behavior of SiC_(p)/Mg-5Zn *** addition,the tensile stress reduction(△P_i) values during in-situ tension test were calculated to analyze the effect of PDZ size on the softening behavior of SiC_(p)/Mg-5Zn *** results show that the work hardening rate of SiC_(p)/Mg-5Zn composites increased with the enlargement of PDZ size,which was attributed to the grain size of SiC_(p)/Mg-5Zn composites increased with the enlargement of PDZ ***,the stress reduction(△P_i) values increased continuously during in-situ tensile for SiC_(p)/Mg-5Zn composites due to the increased stored energy produced during plastic deformation,which provided a driving force for the softening ***,the effect of grain size on the softening behavior is greater than that of the stored energy,which led to the tensile stress reduction(△P_i) values of P30(d_(PDZ)=30 μm)-SiC_(p)/Mg-5Zn composite were higher than that of P60(d_(PDZ)=60 μm)-SiC_(p)/Mg-5Zn composite when the ε_(ri) were 0.25,0.5,0.75 and 1,respectively.