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Scanning strategy in selective laser melting (SLM): a review

  • Critical Review
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Abstract

During the additive manufacturing (AM) process, energy is transferred from the energy beam to the processed material. The high-energy input and uneven temperature distribution result in the high-temperature gradient, large thermal stress, and warping deformation. The scanning strategy, one of the representative AM processing parameters, plays an important role in the microstructures, mechanical properties, and residual stresses of 3D printed parts. It is necessary to review the current state of research about scanning strategy in additive manufacturing, and this paper seeks to address this need. This review mainly focuses on the scanning strategies in selective laser melting process. Various scanning strategies and their effects on mechanical properties, microstructures, and residual stresses of selective laser melted parts are summarized. Finally, some suggestions on the optimization of scanning strategy for better performance are provided based on the above analysis.

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Funding

This work is financially supported by the National Key Research and Development Program of China (2016YFB1100103), National Natural Science Foundation of China (52075327 and 52004160), Science and Technology Commission of Shanghai Municipality (“Sailing Program”, 20YF1419200), Natural Science Foundation of Shanghai (20ZR1427500), and SJTU Global Strategic Partnership Fund (2020 SJTU-KTH).

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  1. Haolin Jia and Hua Sun contributed equally to this work.

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  1. State Key Laboratory of Metal Matrix Composites, School of Materials Science & Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai, 200240, China

    Haolin Jia, Hua Sun, Hongze Wang, Yi Wu & Haowei Wang

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  1. Haolin Jia
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  2. Hua Sun
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  3. Hongze Wang
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Hongze Wang and Yi Wu conceived the idea of the review. Haolin Jia and Hua Sun wrote the initial draft of the paper. All authors contributed to refining the ideas, carrying out additional analyses and finalizing this paper.

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Jia, H., Sun, H., Wang, H. et al. Scanning strategy in selective laser melting (SLM): a review. Int J Adv Manuf Technol 113, 2413–2435 (2021). https://doi.org/10.1007/s00170-021-06810-3

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