Journal of South China University of Technology(Natural Science) >

2010 , Vol. 38 >Issue 11: 12 - 16

DOI: https://doi.org/10.3969/j.issn.1000-565X.2010.11.003

Materials Science & Technology

Microstructures and Mechanical Properties of Welding Zone of 7022 Aluminium Alloy After Friction Stir Welding

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  • 1.College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,China;2.Beijing Aeronautical Manufacturing Technology Research Institute,Beijing 100024,China
汪洪峰（1978-），男，博士生，主要从事智能加工技术研究．

Received date: 2010-02-25

  Revised date: 2010-05-28

  Online published: 2010-11-25

Supported by

国家自然科学基金资助项目（50675104）; 江苏省研究生创新基金资助项目（CX09B_073Z）

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Abstract

7022 aluminium alloy with a thickness of 10 mm was welded via the friction stir welding,and the influences of welding parameters on the microstructures and mechanical properties of the welded joint were investigated.The results show that,at a rotating speed of 400 r/min and a welding speed of 100 mm/min,the tensile strength and yield strength of the welded joint of 7022 aluminium alloy reach 615 MPa and 533 MPa,respectively,which are both greater than those of the base material,and that the microhardness of the welded joint is slightly lower than that of the base material.Moreover,it is found from the fracture surface analyses,it is found that the tensile fracture of the welded joint of 7022 aluminium alloy is ductile.

Key words： friction stir welding; 7022 aluminium alloy; microstructure; mechanical property; fracture morphology

Cite this article

Wang Hong-feng Zuo Dun-wen Wang Min Li Guang Dong Chun-lin . Microstructures and Mechanical Properties of Welding Zone of 7022 Aluminium Alloy After Friction Stir Welding[J]. Journal of South China University of Technology(Natural Science), 2010 , 38(11) : 12 -16 . DOI: 10.3969/j.issn.1000-565X.2010.11.003

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