文献类型：期刊文献

英文题名：Effect of the processing parameters of friction stir processing on the microstructure and mechanical properties of 6063 aluminum alloy

作者：Zhao, Honglong Pan, Qin Qin, Qingdong Wu, Yujiao Su, Xiangdong

通信作者：Qin, QD[1]

机构：[1]Guizhou Inst Technol, Key Lab Light Met Mat Proc Technol Guizhou Prov, Guiyang 550003, Guizhou, Peoples R China;[2]Guizhou Inst Technol, Dept Mat & Met Engn, Guiyang 550003, Guizhou, Peoples R China;[3]2011 Special Funct Mat Collaborat Innovat Ctr Gui, Caiguan Rd, Guiyang 550003, Guizhou, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Key Lab Light Met Mat Proc Technol Guizhou Prov, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院;

年份：2019

卷号：751

起止页码：70-79

外文期刊名：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录：;EI(收录号：20190906551453);Scopus(收录号：2-s2.0-85061994126);WOS:【SCI-EXPANDED(收录号:WOS:000463128800009)】；

基金：This work was supported by the National Natural Science Foundation of China [51564005], the Program for the Distinguished Young Scientific Talents of Guizhou, China [Qian Ke He Platform and talent (2016) 5633], the Key Laboratory of Light Metal Materials Processing of Guizhou Province, China [Qian Ke He Platform and talent (2016) 5104], Guizhou Provincial Higher Education Engineering Research Center, China [Qian Jiao He KY (2017) 021] and the Technological InnovationTalent Team of Guizhou Province, China [Qian Ke He Talent Team (2015) 4008].

语种：英文

外文关键词：6063 Al alloy; Friction stir process; Microstructure; Mechanical properties

摘要：After friction stir processing (FSP), fine equiaxed a-Al grains formed in the weld nugget (WN) of 6063 Al alloy, and their size increased with increasing tool rotation speed in the range of 300-700 rpm. The grain sizes in the bottom zones were smaller than those in the upper zones in the WN, and two-pass FSP led to a larger grain size than single-pass FSP. Tunnel defects can be observed in the thermomechanically affected zone (TMAZ) for a low tool rotation speed of 300 rpm. When the rotation speed exceeds 700 rpm, a good combination interface can form between the WN and the TMAZ. Electron backscatter diffraction (EBSD) results showed that the fraction of the high-angle grain boundary (HAB) was obviously increased after FSP in the WN. The alloys exhibited a more concentrated distribution and higher densities. Transmission electron microscopy (TEM) analysis results showed that the densities of needle-shaped precipitates were reduced in the WN. Some high-density dislocation pile-ups formed at some grains. The ultimate tensile strengths (UTSs) were lower than that of the base material (BM) at lower tool rotation speeds for both single- and two-pass FSP. With increasing speed, the UTSs increased gradually and then became higher than that of the BM. The strain values were all lower than that of the BM.