Fabrication of large-bulk ultrafine grained 6061 aluminum alloy by rolling and low-heat-input friction stir welding

被引：44
作者：
Liu, C. Y. [1 ,2 ]
Qu, B. [2 ]
Xue, P. [1 ]
Ma, Z. Y. [1 ]
Luo, K. [3 ]
Ma, M. Z. [4 ]
Liu, R. P. [4 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
[2] Guilin Univ Technol, Minist Educ, Key Lab New Proc Technol Nonferrous Met & Mat, Guilin 541004, Peoples R China
[3] Guilin Univ Technol, Guangxi Key Lab Univ Clean Met & Comprehens Utili, Guilin 541004, Peoples R China
[4] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2018年 / 34卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Aluminum alloys; Ultrafine grained material; Friction stir welding; Mechanical properties; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; MG ALLOY; MICROSTRUCTURE; STRENGTH; SHEETS; JOINTS; COMPOSITE; PRECIPITATION; FEATURES;
D O I：
10.1016/j.jmst.2017.02.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, the ultrafine grained (UFG) 6061 Al alloys fabricated by cold rolling were friction stir welded (FSW) with different rotation rates under both air cooling and rapid cooling in water. Low-heat-input parameters of 400 rpm rotation rate in water (400-Water) could effectively inhibit the coarsening of recrystallized grains, reduce the precipitation rate, and retain more dislocations of the UFG 6061 Al parent metal. 400-Water joint showed high lowest-hardness value, narrow low-hardness zone, and high tensile strength, attributing to the effect of dislocation, grain boundary, solid-solution, and precipitation hardening. This work provides an effective strategy to fabricate large-sized bulk UFG Al alloy by cold rolling with large deformation and low-heat-input FSW. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码：112 / 118
页数：7
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