基于边缘梯度搜索的激光定向能量沉积熔池尺寸提取方法

doi:10.11896/cldb.22070278

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Abstract Aiming at the problem of being difficult in melt pool width extraction in laser directed energy deposition due to the interference of weak edges, a method for extracting the edge based on edge gradient search was presented based on the difference of gray gradient change of melt pool edge. In order to extract accurate melt pool edge size. First, the melt pool roughly edge was obtained by preprocessing the melt pool image based on mathematical morphology. Then the weak edge gradient threshold was determined through experiments. Finally, the edge gradient search model was adopted to further segmentation the melt pool roughly edge to obtain the precise segmentation edge, and the ellipse fitting method was used to fit the edge of fine segmentation to obtain the weld pool width. Experiment results indicate that the melt pool width can be detected accurately.

Key words： laser directed energy deposition edge extraction edge gradient search ellipse fitting

Published: 25 January 2024 Online: 2024-01-26

CLC number:

TN205

Fund:National Science and Technology Major Project (2019-Ⅶ-0004-0144), the Liaoning BaiQianWan Talents Program (LNBQW 2020B0050), and the Liaoning Revitalization Talents Program(XLYC1902022).

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	Articles by authors
	MIAO Liguo
	XING Fei
	SHI Jianjun
	CHAI Yuanxin
	YAN Chengxin
	BIAN Hongyou
	SUN Haijiang

Cite this article:

MIAO Liguo,XING Fei,SHI Jianjun, et al. Melt Pool Size Extraction Method in Laser Directed Energy Deposition Based on Edge Gradient Search[J]. Materials Reports, 2024, 38(2): 22070278-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22070278 OR http://www.mater-rep.com/EN/Y2024/V38/I2/22070278

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