Effects of Combination of Powders with Different Particle Sizes on Surface Roughness and Internal Defects of IN738 Alloy Formed by Selective Laser Melting

doi:10.3788/LOP202158.0114003

	Effects of Combination of Powders with Different Particle Sizes on Surface Roughness and Internal Defects of IN738 Alloy Formed by Selective Laser Melting
	Hu Yong 1,2; Yang Xiaokang 1,2; Kang Wenjiang 1,2; Ding Yutian 1,2; Xu Jiayu 1,2; Zhang Huiying 1,2
刊名	LASER & OPTOELECTRONICS PROGRESS
	2021-01
卷号	58 期号:1
关键词	laser optics powder particle size selective laser melting surface roughness density internal defects
ISSN号	1006-4125
DOI	10.3788/LOP202158.0114003
英文摘要	The combination of powders with different particle sizes plays a vital role in the quality of samples formed by selective laser melting. In this paper,the effect of IN738 alloy with different particle size powders on the powder characteristics and the quality of the shaped parts have been systematically studied. The results show that the powder fluidity increases with the increase of the volume fraction of the large particle size powder. When powders with large and small particle sizes(50% particle size of 31 mu m to 53 mu m and 50% particle size of 15 mu m to 30 mu m)are matched with each other,the particle size distribution shows that D10 is 15. 1 mu m, D50 is 27. 9 mu m,and D90 is 52. 9 mu m,the apparent density and tap density of the powder are higher. And the density of shaped part reaches 99. 3%,with the better surface roughness and the lower porosity and crack density. The study exhibits that the cracks of the printed parts are solidification cracks,and the cracks are mainly distributed and propagated along the epitaxially grown 001 oriented columnar grain boundaries.
WOS研究方向	Engineering ; Optics
语种	英语
出版者	SHANGHAI INST OPTICS & FINE MECHANICS, CHINESE ACAD SCIENCE
WOS记录号	WOS:000686474300022
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148556]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China;
推荐引用方式 GB/T 7714	Hu Yong,Yang Xiaokang,Kang Wenjiang,et al. Effects of Combination of Powders with Different Particle Sizes on Surface Roughness and Internal Defects of IN738 Alloy Formed by Selective Laser Melting[J]. LASER & OPTOELECTRONICS PROGRESS,2021,58(1).
APA	Hu Yong,Yang Xiaokang,Kang Wenjiang,Ding Yutian,Xu Jiayu,&Zhang Huiying.(2021).Effects of Combination of Powders with Different Particle Sizes on Surface Roughness and Internal Defects of IN738 Alloy Formed by Selective Laser Melting.LASER & OPTOELECTRONICS PROGRESS,58(1).
MLA	Hu Yong,et al."Effects of Combination of Powders with Different Particle Sizes on Surface Roughness and Internal Defects of IN738 Alloy Formed by Selective Laser Melting".LASER & OPTOELECTRONICS PROGRESS 58.1(2021).