晶界角度对Al-Mg-Sc-Zr合金板材各向异性行为的影响  

Effect of grain boundary angle on anisotropic behavior of Al-Mg-Sc-Zr alloy sheets

作　　者：朱家豪 韦莉莉 黄宏锋 刘淑辉 陈晓明 田晔 范俊[2] ZHU Jiahao;WEI Lili;HUANG Hongfeng;LIU Shuhui;CHEN Xiaoming;TIAN Ye;FAN Jun(College of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,Guangxi,China;Yangzonghai Aluminum Electrolysis Branch of Yunnan Aluminum Co.,Ltd.,Kunming 650000,China)

机构地区：[1]桂林理工大学材料科学与工程学院,广西桂林541004 [2]云南铝业股份有限公司阳宗海铝电解分公司,昆明650000

出　　处：《材料工程》2023年第10期76-83,共8页Journal of Materials Engineering

基　　金：国家自然科学基金项目(52261007);广西自然科学基金项目(桂科AD22035039,2022KY0255)。

摘　　要：通过多向锻造和退火处理对Al-Mg-Sc-Zr合金进行晶界优化,对比研究混合晶界结构对合金板材力学性能各向异性行为的影响。结果表明:均匀化状态合金以高角度晶界为主,经过轧制变形后形成较多轧制剪切带和高强度的Brass,Copper和S织构,轧制板材力学性能各向异性行为较为明显,屈服强度IPA_(YS)和抗拉强度IPA_(UTS)指数分别为6.68%和5.85%;合金经过多向锻造和退火处理后,基体为高/低角度晶界结构并存的混晶组织,经过轧制变形后剪切带密度和织构强度明显降低,合金轧制板材性能各向异性行为得到明显改善。Grain boundary optimization of Al-Mg-Sc-Zr alloy was carried out by multi-directional forging and annealing treatment,and the effects of mixed grain boundary structures on the anisotropic behavior of mechanical properties of alloy sheets were investigated.The results show that the homogenized alloy which mainly possesses high angle grain boundaries tends to form rolled shear bands and high intensity Brass,Copper and S textures after rolling deformation,resulting in obvious mechanical properties anisotropy of rolled sheet.The IPA_(YS) of yield strength and IPA_(UTS) of ultimate tensile strength are 6.68% and 5.85%,respectively.After multi-directional forging and annealing treatment,the matrix of the alloy is a mixed crystal structure with high/low angle grain boundary structures.After rolling deformation,the shear band density and texture intensity decrease obviously,resulting in the obvious improvement of the anisotropy of the alloy rolled sheet.

关 键 词：AL-MG-SC-ZR合金 各向异性 剪切带 晶界取向差 变形织构 

分 类 号：TG319[金属学及工艺—金属压力加工] TG339