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Article

Impact on Mechanical Properties and Microstructural Response of Nickel-Based Superalloy GH4169 Subjected to Warm Laser Shock Peening

by 1,2, 3,*, 1,2,*, 1,2, 1,2, 1,2, 1,2 and 1,2
1
Shenyang Institute of Automation, Chinese Academy of Science, Shenyang 110016, China
2
Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110169, China
3
College of Science, Northeastern University, Shenyang 110819, China
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(22), 5172; https://doi.org/10.3390/ma13225172
Received: 8 September 2020 / Revised: 3 November 2020 / Accepted: 5 November 2020 / Published: 16 November 2020
(This article belongs to the Special Issue Advances in Laser Assisted Processing and Manufacturing)
Laser shock peening (LSP), as an innovative surface treatment technology, can effectively improve fatigue life, surface hardness, corrosion resistance, and residual compressive stress. Compared with laser shock peening, warm laser shock peening (WLSP) is a newer surface treatment technology used to improve materials’ surface performances, which takes advantage of thermal mechanical effects on stress strengthening and microstructure strengthening, resulting in a more stable distribution of residual compressive stress under the heating and cyclic loading process. In this paper, the microstructure of the GH4169 nickel superalloy processed by WLSP technology with different laser parameters was investigated. The proliferation and tangling of dislocations in GH4169 were observed, and the dislocation density increased after WLSP treatment. The influences of different treatments by LSP and WLSP on the microhardness distribution of the surface and along the cross-sectional depth were investigated. The microstructure evolution of the GH4169 alloy being shocked with WLSP was studied by TEM. The effect of temperature on the stability of the high-temperature microstructure and properties of the GH4169 alloy shocked by WLSP was investigated. View Full-Text
Keywords: warm laser shock peening (WLSP); GH4169 nickel-based superalloy; microstructure; residual stress warm laser shock peening (WLSP); GH4169 nickel-based superalloy; microstructure; residual stress
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MDPI and ACS Style

Lu, Y.; Yang, Y.; Zhao, J.; Yang, Y.; Qiao, H.; Hu, X.; Wu, J.; Sun, B. Impact on Mechanical Properties and Microstructural Response of Nickel-Based Superalloy GH4169 Subjected to Warm Laser Shock Peening. Materials 2020, 13, 5172. https://doi.org/10.3390/ma13225172

AMA Style

Lu Y, Yang Y, Zhao J, Yang Y, Qiao H, Hu X, Wu J, Sun B. Impact on Mechanical Properties and Microstructural Response of Nickel-Based Superalloy GH4169 Subjected to Warm Laser Shock Peening. Materials. 2020; 13(22):5172. https://doi.org/10.3390/ma13225172

Chicago/Turabian Style

Lu, Ying, Yuling Yang, Jibin Zhao, Yuqi Yang, Hongchao Qiao, Xianliang Hu, Jiajun Wu, and Boyu Sun. 2020. "Impact on Mechanical Properties and Microstructural Response of Nickel-Based Superalloy GH4169 Subjected to Warm Laser Shock Peening" Materials 13, no. 22: 5172. https://doi.org/10.3390/ma13225172

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