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《材料导报》期刊社  2017, Vol. 31 Issue (8): 62-65    https://doi.org/10.11896/j.issn.1005-023X.2017.08.013
  材料研究 |
焊后时效处理对6082-T6铝合金搅拌摩擦焊接头的影响*
王希靖, 魏学玲, 张亮亮
兰州理工大学材料科学与工程学院,兰州理工大学有色金属先进加工与再利用省部共建国家重点实验室, 兰州 730050
Effects of Post-weld Aging Treatment on Friction Stir Welding Joint of 6082-T6 Aluminum Alloy
WANG Xijing, WEI Xueling, ZHANG Liangliang
State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050
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摘要 对6082-T6铝合金搅拌摩擦焊接头进行自然时效和人工时效处理, 通过透射电子显微镜、 扫描电子显微镜、 拉伸实验机和显微硬度计对组织演变和力学性能进行研究。结果表明:人工时效处理后显微硬度比焊态和自然时效高10~25HV,提高焊核区和热机影响区硬度效果明显好于自然时效。经过焊后自然时效、人工时效的焊接接头力学性能得到一定程度的提升, 人工时效析出相比自然时效析出相抗拉强度提高12%,延伸率降低9%,人工时效提高拉伸强度效果更明显。人工时效处理后,焊核区组织发生显著变化,NZ主要为GP区, 经过人工时效后NZ强化效应随团簇和GP区尺寸增大及数量增多而加强。HAZ主要为粗大的β′, 经过人工时效后变化不大, 硬度基本保持不变。通过对微观组织进行研究发现析出物的形状由界面能和应变能决定。
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王希靖
魏学玲
张亮亮
关键词:  6082-T6铝合金  搅拌摩擦焊  透射电镜  组织演变  力学性能    
Abstract: Microstructure evolution and mechanical properties of friction stir welded 6082-T6 aluminum alloy during post-weld natural and artificial aging treatment were investigated by means of transmission electron microscope(TEM), scanning electron microscope (SEM), tensile test machine and Vickers hardness tester. The results show that microhardness of the joint after artificial aging treatment was about 10-25HV higher than welded and naturally aged alloy. Artificial aging was superior to natural aging on improving the microhardness of the nugget zone and heat affected zone. After post-weld natural aging or artificial aging treatment, the mechanical properties of welded joint was improved to certain extents.The tensile strength increased by 12% and elongation decreased by 9% after artificial aging, compared to natural aging. Artificial aging was more effective for tensile strength improvement. After artificial aging, the microstructure of the nugget had significant changes. NZ was mainly GP zone and the microhardness increased with the increase of the cluster size and the GP region after artificial aging treatment. HAZ was mainly coarse β′, but microhardness had little change after artificial aging treatment.It is found that the shape of precipitates can be determined by the interface energy and strain energy via microstructure analysis.
Key words:  6082-T6 aluminum alloy    friction stir welding (FSW)    transmission electron microscope (TEM)    microstructure evolution    mechanical property
               出版日期:  2017-04-25      发布日期:  2018-05-02
ZTFLH:  TG453  
基金资助: 国家科技重大专项(2012ZX04008011)
作者简介:  王希靖:男,1956年生,教授,博士研究生导师,主要从事焊接设备及其自动化、搅拌摩擦焊技术及焊接质量控制的研究 E-mail:wangxj@lut.cn
引用本文:    
王希靖, 魏学玲, 张亮亮. 焊后时效处理对6082-T6铝合金搅拌摩擦焊接头的影响*[J]. 《材料导报》期刊社, 2017, 31(8): 62-65.
WANG Xijing, WEI Xueling, ZHANG Liangliang. Effects of Post-weld Aging Treatment on Friction Stir Welding Joint of 6082-T6 Aluminum Alloy. Materials Reports, 2017, 31(8): 62-65.
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http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2017.08.013  或          http://www.mater-rep.com/CN/Y2017/V31/I8/62
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