Microstructure and Property of Inconel 738 Alloy by Selective Laser Melting Forming

	Microstructure and Property of Inconel 738 Alloy by Selective Laser Melting Forming
	Xu Jiayu; Ding Yutian; Hu Yong; Gao Yubi; Chen Jianjun; Yang Qian
刊名	RARE METAL MATERIALS AND ENGINEERING
	2019-11
卷号	48 期号:11 页码:3727-3734
关键词	selective laser melting (SLM) Inconel 738 alloy laser volume energy density density microstructure and property
ISSN号	1002-185X
英文摘要	Effect of volume energy density on the relative density, microstructure and microhardness of Inconel 738 alloy fabricated by selective laser melting (SLM) was investigated by SEM, EBSD and OM. The results show that volume energy density plays a decisive role in the SLM forming process. With the increase of the volume energy density, the relative density increases first and then decreases. The highest relative density (99.4%) can be achieved at 65.2 J/mm(3). During solidification, the microstructure of Inconel 738 alloy formed by 2.44x105 K/s SLM has obvious anisotropy in vertical direction and parallel direction. The microstructure parallel to the building direction is "chess board", the vertical to building direction is "fish scale", and overlap zone between adjacent layers and neighbor tracks is the refined cellar grains. The microstructure shows obvious texture. With the increase of the laser volume energy density, the texture in the <100> direction increases gradually. The hardness of the sample increases with the increase of the laser volume energy density. When the laser volume density is higher than 65.2 J/mm(3), the hardness (HV) value of Inconel 738 alloy is higher than that of precision casting specimen (4100 MPa).
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	中文
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000500083600044
状态	已发表
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/64218]
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
通讯作者	Ding Yutian
作者单位	Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Xu Jiayu,Ding Yutian,Hu Yong,et al. Microstructure and Property of Inconel 738 Alloy by Selective Laser Melting Forming[J]. RARE METAL MATERIALS AND ENGINEERING,2019,48(11):3727-3734.
APA	Xu Jiayu,Ding Yutian,Hu Yong,Gao Yubi,Chen Jianjun,&Yang Qian.(2019).Microstructure and Property of Inconel 738 Alloy by Selective Laser Melting Forming.RARE METAL MATERIALS AND ENGINEERING,48(11),3727-3734.
MLA	Xu Jiayu,et al."Microstructure and Property of Inconel 738 Alloy by Selective Laser Melting Forming".RARE METAL MATERIALS AND ENGINEERING 48.11(2019):3727-3734.