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Effect of interlayer laser shock peening on residual stress induced by selective laser melting

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Abstract

Laser shock peening (LSP) is a surface-strengthening technique that reduces residual stress in metallic parts. However, there is little literature on interlayer LSP strengthening during selective laser melting (SLM). To systematically investigate the effect of LSP on SLM residual stress, we established the removable LSP impact model based on the SLM multiple deposition layers. The mechanism by which the LSP parameters affect the residual stress of SLM is revealed. The results show that the residual tensile stress of SLM transferred to residual compressive stress due to LSP. The peak pressure of LSP is the most crucial factor for determining the residual stress field. The overlap has the second highest effect on the residual stress field due to the higher overlap causing the LSP to be repeatedly impacted at the same location. The effect of LSP diameter and full width at half maximum (FWHM) on residual stress is not as prominent as the first two. However, the appropriate LSP diameter and FWHM can reduce the residual stress hole phenomenon. This work is instructive for eliminating and controlling residual stress in metallic parts manufactured by SLM.

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Availability of data and materials

The data that support the findings of this study are available from the corresponding author upon reasonable request.

Code Availability

The code that supports the findings of this study is available from the corresponding author upon reasonable request.

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Funding

The present work was supported by the National Science Foundation of China (no. 51871012, 52071021) and Fundamental Research Funds for the Central Universities (no. FRF-GF-20-20B).

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Authors and Affiliations

  1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China

    Xianlong Li, Laiqi Zhang & Xu Wei

  2. Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Laiqi Zhang

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  1. Xianlong Li
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Contributions

Xianlong Li: methodology, formal analysis, writing—original draft preparation, data curation, visualization. Laiqi Zhang: conceptualization, funding acquisition, writing—review and editing. Xu Wei: visualization, investigation.

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Correspondence to Laiqi Zhang.

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Laiqi Zhang and Xu Wei contributed equally to this work.

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Li, X., Zhang, L. & Wei, X. Effect of interlayer laser shock peening on residual stress induced by selective laser melting. Int J Adv Manuf Technol 129, 611–628 (2023). https://doi.org/10.1007/s00170-023-12278-0

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