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材料工程  2018, Vol. 46 Issue (10): 55-59    DOI: 10.11868/j.issn.1001-4381.2017.001011
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
6082铝合金搅拌摩擦焊焊接过程中晶粒取向演化
张亮亮1, 王希靖1,2, 刘骁1
1. 兰州理工大学 省部共建有色金属先进加工与 再利用国家重点实验室, 兰州 730050;
2. 兰州理工大学 材料科学与工程学院, 兰州 730050
Crystal Orientation Evolution During Friction Stir Welding of 6082 Aluminum Alloys
ZHANG Liang-liang1, WANG Xi-jing1,2, LIU Xiao1
1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;
2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China
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摘要 采用电子背散射衍射(EBSD)技术,研究6082-T6铝合金搅拌摩擦焊焊核区及母材上表面晶粒形貌、晶界特征、织构组分的演化。结果表明:在焊接过程中,母材发生塑性变形以及动态回复再结晶,晶粒被细化;基于搅拌针后方所形成的汤普森四面体,邻近匙孔焊核区首先形成(110)[001]高斯织构和(114)[221]织构,且这两种织构晶粒沿〈110〉晶向旋转一定角度,进一步形成(112)[111]铜织构、(111)[112]织构;距匙孔40mm处焊核区,经历了轴肩的挤压,塑性变形程度更大,使得[110]丝织构占主导地位。
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张亮亮
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刘骁
关键词 6082-T6铝合金搅拌摩擦焊晶粒取向演化电子背散射衍射    
Abstract:The evolution of grain morphology, grain boundary characterization, misorientation distribution and texture in upper part of base metal and nugget zone during friction stir welding of 6082-T6 aluminum alloys was investigated by the electron backscattered diffraction (EBSD) technique. The results show that the grains of the base metal are refined due to the experienced plastic deformation and dynamic recrystallization; based on the Thompson tetrahedrons that are formed behind the pin, the (110)[001] Goss texture and (114)[221] texture are formed firstly in nugget zone adjacent to keyhole. Those grains rotate along 〈110〉 crystallographic direction due to the stress introduced by the shoulder, leading subsequently to the formation of the (112)[111] copper texture and (111)[112] texture; the nugget zone located at a distance of 40mm from the keyhole experiences shoulder extrusion, thus, the plastic deformation degree becomes bigger and the[110] fiber texture consequently dominates in this region.
Key words6082-T6 aluminum alloy    friction stir welding    crystal orientation evolution    EBSD
收稿日期: 2017-08-10      出版日期: 2018-10-17
中图分类号:  TG453  
通讯作者: 王希靖(1956-),男,教授,研究方向:焊接设备及其自动化,搅拌摩擦焊技术及焊接质量控制,联系地址:甘肃省兰州市七里河区兰工坪287号兰州理工大学材料科学与工程学院(730050),E-mail:wangxj@lut.cn     E-mail: wangxj@lut.cn
引用本文:   
张亮亮, 王希靖, 刘骁. 6082铝合金搅拌摩擦焊焊接过程中晶粒取向演化[J]. 材料工程, 2018, 46(10): 55-59.
ZHANG Liang-liang, WANG Xi-jing, LIU Xiao. Crystal Orientation Evolution During Friction Stir Welding of 6082 Aluminum Alloys. Journal of Materials Engineering, 2018, 46(10): 55-59.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2017.001011      或      http://jme.biam.ac.cn/CN/Y2018/V46/I10/55
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