Effect of Laser Shock Peening on Microstructure and Properties of Laser Additive Manufactured TC4 Titanium Alloy

Xuepeng Chen; Lingfeng Zhang; Yi Xiong; Gaoli Luo; Yongli Wu

doi:10.3788/CJL202249.1602017

Chinese Journal of Lasers, Volume. 49, Issue 16, 1602017(2022)

Effect of Laser Shock Peening on Microstructure and Properties of Laser Additive Manufactured TC4 Titanium Alloy

Xuepeng Chen¹, Lingfeng Zhang^1,2、*, Yi Xiong^1,2, Gaoli Luo¹, and Yongli Wu¹

Author Affiliations

¹School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, Henan, China

²Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Luoyang 471023, Henan, China

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Figures & Tables(11)

Fig. 1. Dimension of plate sample

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Fig. 2. Dimension of tensile sample

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Fig. 3. Hardness trajectory diagram

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Fig. 4. OM microstructure morphologies of LAM-TC4 titanium alloy before and after LSP. (a) Before LSP; (b) after LSP

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Fig. 5. TEM microstructure morphologies of LAM-TC4 titanium alloy before and after LSP. (a) Before LSP; (b)(f) after LSP

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Fig. 6. XRD patterns of LAM-TC4 titanium alloy before and after LSP. (a) 30°90°；(b) 34°42°

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Fig. 7. Residual stress at different depths of LAM-TC4 titanium alloy before and after LSP

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Fig. 8. Microhardness distribution in depth direction of LAM-TC4 titanium alloy before and after LSP

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Fig. 9. Tensile properties of LAM-TC4 titanium alloy before and after LSP

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$Tensile fracture morphologies of LAM-TC4 titanium alloy before and after LSP. (a) Surface fracture morphology of sample before LSP; (b) heart fracture morphology of sample before LSP; (c) surface fracture morphology of sample after LSP; (d) heart fracture morphology of sample after LSP$

Fig. 10. Tensile fracture morphologies of LAM-TC4 titanium alloy before and after LSP. (a) Surface fracture morphology of sample before LSP; (b) heart fracture morphology of sample before LSP; (c) surface fracture morphology of sample after LSP; (d) heart fracture morphology of sample after LSP

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Table 1. Chemical compositions of LAM-TC4 alloy
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Table 1. Chemical compositions of LAM-TC4 alloy
Element Al V Fe C Ti
Mass fraction /% 6.25 4.12 0.05 0.01 Bal.

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Xuepeng Chen, Lingfeng Zhang, Yi Xiong, Gaoli Luo, Yongli Wu. Effect of Laser Shock Peening on Microstructure and Properties of Laser Additive Manufactured TC4 Titanium Alloy[J]. Chinese Journal of Lasers, 2022, 49(16): 1602017

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