Influence of multi-pass friction stir processing on microstructure and mechanical properties of 7B04-O Al alloy

作     者：Yu CHEN Hua DING Zhi-hui CAI Wen-jing YANG 陈雨;丁桦;S.MALOPHEYEV;R.KAIBYSHEV;蔡志辉;杨文静

作者机构：School of Materials Science and Engineering Northeastern University Shenyang 110819 China 

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

年 卷 期：2017年第27卷第4期

页      面：789-796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：support received from the Ministry of Education and Science,Russia,(Belgorod State University project No.1533)is acknowledged support from the National Science Foundation for Young Scientists of China(No.51501035) Chinese Postdoctoral Science Foundation(No.2016T90227) supported financially by the National Natural Science Foundation of China(No.51334006) 

主　　题：friction stir processing multi-pass grain refinement aluminum alloy 

摘      要：Three-pass friction stir processing(FSP)with different moving distances of the stirring tool between the two successivepasses,50%diameter of the pin(traditional way)and50%diameter of the shoulder(novel way),was conducted on7B04-O Al *** result shows that an improvement in the mechanical properties of the processed zone is accomplished due to grain and secondphase particles *** hardness of the multi-pass FSP(M-FSP)sample is about HV40higher than that of the base *** the tensile strength of the M-FSP specimens is also significantly increased to about1.4times that of the base ***,theweak region of the processed zone is mainly dependent on the moving distance,where it is the previous pass stir zone in thetraditional way and the transitional zone in the novel *** the rotational speed narrows the weak region in the novel way,while it does not in the traditional way.