Microstructure evolution and mechanical properties of Al−3.6Cu−1Li alloy via cryorolling and aging

作     者：Chang LI Han-qing XIONG Laxman BHATTA Lin WANG Zhao-yang ZHANG Hui WANG Charlie KONG Hai-liang YU 李畅;熊汗青;Laxman BHATTA;王琳;张朝阳;王辉;Charlie KONG;喻海良

作者机构：State Key Laboratory of High Performance Complex ManufacturingCentral South UniversityChangsha 410083China School of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China Research Center for Advanced Science and TechnologyThe University of TokyoMeguroTokyo 1530041Japan Electron Microscope UnitUniversity of New South WalesSydneyNSW 2052Australia Light Alloys Research InstituteCentral South UniversityChangsha 410083China 

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

年 卷 期：2020年第30卷第11期

页      面：2904-2914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：Project(2019YFB2006500)supported by the National Key Research and Development Program of China Project(51674303)supported by the National Natural Science Foundation of China Project(2018RS3015)supported by the Huxiang High-Level Talent Gathering Project of Hunan Province,China Project(2019CX006)supported by the Innovation Driven Program of Central South University,China Project supported by the Research Fund of the Key Laboratory of High Performance Complex Manufacturing at Central South University,China 

主　　题：Al−Cu−Li alloy cryorolling aging precipitation strengthening mechanical property 

摘      要：An Al−3.6Cu−1Li alloy was subjected to room temperature rolling and cryorolling to investigate their effects on microstructure evolution and mechanical *** microstructure and aging characteristics of the room temperature-rolled and the cryorolled alloys with 70%and 90%of thickness reductions were studied by microstructure analysis and mechanical *** samples subjected to cryorolling with 90%of thickness reduction have high strength and good *** is mainly due to the inhibition of dynamic recovery and the accumulation of high-density dislocations in cryorolled *** addition,the artificial aging reveals that the temperature at which peak hardness is attained is inversely proportional to the deformation amount and directly proportional to the rolling ***,bright field images of cryorolled samples after aging indicate the existence of T1(Al2CuLi)*** suggests that the high stored strain energy enhances the aging kinetics of the alloy,which further promotes the nucleation of T1 phases.