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Laser & Optoelectronics Progress, Volume. 55, Issue 1, 11413(2018)

Effect of Laser Shock Peening on Microstructure and Residual Stress of Wire-Arc Additive Manufactured 2319 Aluminum Alloy

Sun Rujian, Zhu Ying, Li Liuhe, Guo Wei*, and Peng Peng
Author Affiliations
  • School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (9)
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    References (29)
    Cited By (2)
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    Figures & Tables(9)
    (a) Schematic of WAAM; (b) specimen by WAAM

    Fig. 1. (a) Schematic of WAAM; (b) specimen by WAAM

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    LSP experiment. (a) Impact path; (b) specimen after LSP

    Fig. 2. LSP experiment. (a) Impact path; (b) specimen after LSP

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    Microstructures of grains. (a) Before LSP; (b) after LSP

    Fig. 3. Microstructures of grains. (a) Before LSP; (b) after LSP

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    Analysis results by grain size software. (a) Grain size; (b) grain size distribution before LSP; (c) grain size distribution after LSP

    Fig. 4. Analysis results by grain size software. (a) Grain size; (b) grain size distribution before LSP; (c) grain size distribution after LSP

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    TEM images of 2319 aluminum alloys by WAAM. (a) Before LSP; (b) after LSP

    Fig. 5. TEM images of 2319 aluminum alloys by WAAM. (a) Before LSP; (b) after LSP

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    Microhardness of 2319 aluminum alloys by WAAM

    Fig. 6. Microhardness of 2319 aluminum alloys by WAAM

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    Residual stress in depth direction of 2319 aluminum alloys by WAAM

    Fig. 7. Residual stress in depth direction of 2319 aluminum alloys by WAAM

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    • Table 1. Main chemical compositions of 2A12 substrate and 2319 welding wire (mass fraction, %)

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      Table 1. Main chemical compositions of 2A12 substrate and 2319 welding wire (mass fraction, %)

      MaterialCuMnZrSiMgZnTiAl
      2A12 substrate3.9-4.80.3-0.9≤0.3≤0.51.2-1.8≤0.3≤0.15Bal.
      2319 welding wire5.960.30.120.04-0.10.17Bal.

    • Table 2. Process parameters of WAAM

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      Table 2. Process parameters of WAAM

      ParameterWeldertypeTungstenelectrodediameter /mmWirediameter /mmWire feedingspeed /(m·min-1)ShieldinggasFlow rate ofshielding gas /(L·min-1)Travel speed /(m·min-1)
      ContentTungsten inertgas welding31.21.5Ar150.3
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    Sun Rujian, Zhu Ying, Li Liuhe, Guo Wei, Peng Peng. Effect of Laser Shock Peening on Microstructure and Residual Stress of Wire-Arc Additive Manufactured 2319 Aluminum Alloy[J]. Laser & Optoelectronics Progress, 2018, 55(1): 11413

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    Paper Information

    Category: Lasers and Laser Optics

    Received: Aug. 15, 2017

    Accepted: --

    Published Online: Sep. 10, 2018

    The Author Email: Guo Wei (gwei@buaa.edu.cn)

    DOI:10.3788/LOP55.011413

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology