Microstructure and mechanical property comparison of Inconel alloys fabricated using micro and conventional laser powder bed fusion

doi:10.1016/j.matdes.2023.112534

IMR OpenIR

	Microstructure and mechanical property comparison of Inconel alloys fabricated using micro and conventional laser powder bed fusion
	Chen, Yixuan 1; Wang, Weihao 1; Ou, Yao 1; Chang, Hai 1; Wu, Yingna 1; Yang, Rui 1,2; Zhai, Zirong 1; Li, Kefei 3; Shen, Liyaowei 3
通讯作者	Zhai, Zirong(zhaizr@shanghaitech.edu.cn)
	2024
发表期刊	MATERIALS & DESIGN
ISSN	0264-1275
卷号	237 页码:13
摘要	Compared to conventional laser powder bed fusion (c-LPBF), micro laser powder bed fusion (mu-LPBF) offers enhanced capabilities for fabricating complex components with exceptional accuracy. This is achieved through the utilization of a finer laser beam and smaller metal powder, leading to distinct differences in microstructure when compared to c-LPBF. Despite promising outcomes, a comprehensive understanding of these distinctions remains incomplete. One notable observation in the mu-LPBF samples in this study was the presence of a weaker 100 texture along the build direction. Additionally, these samples exhibited smaller grain sizes, a higher density of low-angle grain boundaries, and the presence of geometrically necessary dislocations. Significantly, mu-LPBF demonstrates the potential to produce IN718 with exceptional isotropic mechanical properties, primarily attributed to its capacity to generate refined microstructures and facilitate distinct solidification behaviors. Of particular significance was the remarkable 39.1 % increase in yield strength observed along the building direction by mu-LPBF. Furthermore, the differences in yield strength and ultimate tensile strength between various directions are notably reduced to 7 and 41 MPa, respectively, with a minimal total elongation variation of only 1.8 %. To gain deeper insights into the solidification behavior, Computational fluid dynamics were conducted in conjunction with the discrete element method.
关键词	Micro laser powder bed fusion Microstructure Isotropic mechanical properties Computational fluid dynamics
资助者	Double First-Class Initiative fund ; ShanghaiTech University ; CAS Interdisciplinary Innovation Team Project
DOI	10.1016/j.matdes.2023.112534
收录类别	SCI
语种	英语
资助项目	Double First-Class Initiative fund ; ShanghaiTech University ; CAS Interdisciplinary Innovation Team Project[JCTD-2020-10]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001138200400001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/183617
专题	中国科学院金属研究所
通讯作者	Zhai, Zirong
作者单位	1.ShanghaiTech Univ, Ctr Adapt Syst Engn, 393 Huaxia Middle Rd, Shanghai 201210, Peoples R China 2.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.Aixway3d Jiangsu Technol Co Ltd, Taicang 215400, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yixuan,Wang, Weihao,Ou, Yao,et al. Microstructure and mechanical property comparison of Inconel alloys fabricated using micro and conventional laser powder bed fusion[J]. MATERIALS & DESIGN,2024,237:13.
APA	Chen, Yixuan.,Wang, Weihao.,Ou, Yao.,Chang, Hai.,Wu, Yingna.,...&Shen, Liyaowei.(2024).Microstructure and mechanical property comparison of Inconel alloys fabricated using micro and conventional laser powder bed fusion.MATERIALS & DESIGN,237,13.
MLA	Chen, Yixuan,et al."Microstructure and mechanical property comparison of Inconel alloys fabricated using micro and conventional laser powder bed fusion".MATERIALS & DESIGN 237(2024):13.