Effect of strain rate on microstructure and mechanical properties of spray-formed Al-Cu-Mg alloy

作     者：Tong SHEN Cai-he FAN Ze-yi HU Qin WU Yu-meng NI Yu-zhou CHEN 沈彤;范才河;胡泽艺;吴琴;倪雨朦;陈昱洲

作者机构：College of Materials and Advanced-ManufacturingHunan University of TechnologyZhuzhou 412007China Anhui Jianye Science and Technology Co.Ltd.Huaibei 235000China Hunan Zhirong Science and Technology Co.Ltd.Zhuzhou 412000China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2022年第32卷第4期

页      面：1096-1104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：financially supported by the Major Special Projects in Anhui Province,China(No.202003c08020005) the Key Projects in Hunan Province,China(No.2020GK2045) 

主　　题：spray forming Al-Cu-Mg alloy strain rate microstructure mechanical properties 

摘      要：Transmission electron microscopy(TEM),X-ray diffraction(XRD),electron backscattered diffraction(EBSD),and tensile tests were used to study the effects of strain rates(0.1,1 and 9.1 s^(-1))on the microstructure and mechanical properties of spray-formed Al-Cu-Mg alloys during large-strain rolling at 420℃.Results show that during hot rolling,the proportion of high-angle grain boundaries(HAGBs)and the degree of dynamic recrystallization(DRX)initially increase and then decrease,whereas the average grain size and dislocation density show the opposite trend with the increase of the strain *** addition,the number of S′phases in the matrix decreases,and the grain boundary precipitates(GBPs)become coarser and more discontinuous as the strain rate *** the strain rate increases from 0.1 to 9.1 s^(-1),the tensile strength of the alloy decreases from 492.45 to 427.63 MPa,whereas the elongation initially increases from 12.1%to 21.8%and then decreases to 17.7%.