激光熔化沉积稀释率对重熔行为与致密度的影响

doi:10.11896/cldb.21090124

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Abstract The fatigue properties of the laser melting deposition (LMD) parts is generally inferior to those made by traditional technologies due to the inherent defects of parts fabricated by the LMD, such as porosity, lack of fusion, microcracks and impurities. In order to alleviate the defects in the LMD parts, it is necessary to study the formation and control mechanism of the defects induced by the LMD process. In this study, the effects of single-track dilution rate on the remelting behaviors and density of the deposited parts were analyzed by the 3D finite element simulation and microscopic investigation. Firstly, the density of the LMD parts fabricated by different process parameters was measured, and the fitting curve between the surface energy density of the single-track deposition and the density of the LMD parts was established. Then the effects of process parameters on the geometric characteristics of the single-track deposition and the effects of dilution rate of the single-track deposition on the remelting behaviors of parts were studied. Finally, the fitting curve between the dilution rate of the single-track deposition and the density of the LMD parts was established and its fitting degree was higher. This research has a certain guiding significance for the density control of parts in the LMD process.

Key words： density laser melting deposition (LMD) dilution remelting behavior

Published: Online: 2023-03-27

CLC number:

TG142

Fund:National Key Research and Development Program of China (2016YFB1100202-1).

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	Articles by authors
	DUAN Chenghong
	CHI Hanlin
	LUO Xiangpeng
	GONG Pengjie

Cite this article:

DUAN Chenghong,CHI Hanlin,LUO Xiangpeng, et al. Effects of Dilution Rate of Laser Melting Deposition on Remelting Behaviors and Density[J]. Materials Reports, 2023, 37(6): 21090124-8.

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http://www.mater-rep.com/EN/10.11896/cldb.21090124 OR http://www.mater-rep.com/EN/Y2023/V37/I6/21090124

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