Effect of 7050 Aluminium Alloy Microstructure on Residual Stress by Laser Shock Processing

Abstract:

The solution treatment and solution and aging treatment (T6) were disposed on 7050 aluminium alloy, then local processed by laser shock processing (LSP) with high-rate neodymium glass laser. The microhardness and residual stress on the surface of 7050 aluminium alloy were tested, then how the microstructure influences the residual stress on the surface of 7050 aluminium alloy by laser shock processing was analysed. The results show that the microhardness and residual compressive stress on the surface of 7050 aluminium alloy treated by solution and aging treatment was higher, and decreased obviously treated by solution treatment; the microhardness and residual compressive stress on the surface of 7050 aluminium alloy increased obviously by solution treatment and solution and aging treatment after laser shock processing; treated by solution treatment and solution and aging treatment, the microhardness and residual compressive stress of the material with uniform original structure was higher than the material with nonuniform original structure.

• Periodical: Advanced Materials Research (Volumes 463-464)
• Pages: 1363-1367
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.463-464.1363
• Online since: February 2012
• Authors: M.L. Zhang, J.M. Wang, Y.F. Jiang, Q.L. Zhang, Q.L. Zhou
• Keywords: 7050 Aluminium Alloy, Laser Shock Processing (LSP), Microstructure, Residual Stress

References

[1] Song Renguo. Current Status and Trends in High Strength Aluminium Alloy Research[J]. Material Review, 2000, 1:86~94.

[2] P.Peyre, R. Fabbro. Laser shock processing: a review of the physics and applications [J].Opt. Quantum Elecron ,1995, 27(12):1213~1229.

DOI: 10.1007/bf00326477

[3] Zhang Yongkang, Zhou Jianzhong. Zuo Dunwen,et. Study on technology of flexible forming of sheet metal based on laser shock waves[J].Materials Science Forum,2004,471~472:453~456.

DOI: 10.4028/www.scientific.net/msf.471-472.453

[4] Zhou Jianzhong, Yang Jichang. Zhang Yongkang. A study on super-speed forming of metal sheet by laser shock waves[J].Journal of Materials Processing Technology, 2002, 129(1~3):241~244.

DOI: 10.1016/s0924-0136(02)00609-x

[5] Wu Xianqian, Huang Chenguang, Song Hongwei. Parameters Analysis of Residual Stress Induced by Laser Shock Processing [J].CHINESE JOURNAL OF LASERS,2010,37(10):2632~2637.

DOI: 10.3788/cjl20103710.2632

[6] Guan Haibing, Ye Yunxia, Lu Jinzhong, Zhang Yongkang, Qian Xiaoming, Wu Zhong. Effect of Amplified Spontaneous Emission on Residual Stress of 7050 Aluminium Alloy by Laser Shock Processing [J].CHINESE JOURNAL OF LASERS, 2010, 37(8):2121~2125.

DOI: 10.3788/cjl20103708.2121

[7] WANG Qing-ming, SUN Yuan.Research development on the test methods of residual stress [J].Journal of Mechanical & Electrical Engineering, 2011,28(1):11~15.

[8] Kong Dejun,Zhu Wei,Lu Jinzhong.Effects of Laser Shock Processing on Residual Stress of Aluminum Alloy LY12CZ[J].RARE METAL MATERIALS AND ENGINEERING,2009,30:30 8~311.

[9] Xiao Daihong,Chen Kanghua,Luo Weihong.Effect of Solution Heat Treatment on Mircostucture and Properties of AA7085 Aluminum Alloys[J].RARE METAL MATERIALS AND ENGINERING,2010,39:494~497.

[10] HOU Xian-zhi,LIU Xian-dong,FENG Zheng-hai,CHI Fu-quan.Research about heat treatment and microstructure of 7050 aluminum alloy[J].Light Alloy Fabrication Technology, 2007, 11:47~49.

[11] SUN Cai,DONG Lixin,LIU Liling.Effect of Solution Treatment on Microstucture and Mechanical Properties of 7075 Al Alloy[J].Materials & Heat Treatment,2010,39(24):249~256.

[12] Charles S.Montross,Tao Wei,Lin Ye,Graham Clark,Yiu-Wing Mai.Laser shock processing and its effects on mircostructure and properties of metal alloys:a review[J].International Journal of Fatigue,24(2002):1021-1036.

DOI: 10.1016/s0142-1123(02)00022-1

[13] WANG Qiu-cheng,KE Ying-lin.Control and relief of residual stresses in high-strength aluminum alloy parts for aerospace industry[J].JOURNAL OF AERONAUTICAL MATERIALS,2001,22(3):59~62.