Microstructural evolution and its influence on the wear resistance of a laser directed energy deposited Ni-based single crystal superalloy

doi:10.1016/j.jmst.2024.03.048

IMR OpenIR

	Microstructural evolution and its influence on the wear resistance of a laser directed energy deposited Ni-based single crystal superalloy
	Ren, Chenyu 1; Chen, Kai 1; Liang, Jingjing 2; Narayan, R. Lakshmi 3; Ramamurty, Upadrasta 4; Li, Jinguo 2
通讯作者	Chen, Kai(kchenlbl@gmail.com) ; Liang, Jingjing(jjliang@imr.ac.cn) ; Li, Jinguo(jgli@imr.ac.cn)
	2025-01-10
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	205 页码:127-138
摘要	The wear behavior of Ni-based single crystal (NBSC) superalloy SRR99 fabricated by laser-directed energy deposition (LDED) is investigated and compared with that of its cast counterpart. While gamma' precipitate size in the latter is > 400 nm, that in the former is an order of magnitude lower. Dry sliding wear tests reveal that the wear rate and coefficient of friction of the LDED alloy are 75 % and 20 % lower than that of its cast counterpart, respectively. Detailed transmission electron microscopy investigation of the wear-tested cast alloy indicates that there is orientation change and formation of nanoscale grains only at the top layer of the worn surface, whereas regions below undergo moderate plastic deformation via dislocation slip. In contrast, the sub-surface of the worn LDED alloy has a graded microstructure, with a composite of NiO/gamma-Ni on the top, gamma' free nano-grains in the middle, and a highly deformed nanoscale layer at the bottom. The improved wear behavior of the LDED alloy is attributed to its higher dislocation density, finer gamma' precipitates, and the formation of this graded microstructure. Finally, a detailed description of mechanisms that lead to the formation of this unique graded microstructure is provided. (c) 2025 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	In-situ formed gradient nanostructure Enhanced wear resistance Laser-directed energy deposition additive manufacturing Ni-based single crystal superalloys Plastic deformation
资助者	National Key R&D Program of China ; National Natural Science Foundation of China ; National Science and Technology Major Project
DOI	10.1016/j.jmst.2024.03.048
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2023YFB3712002] ; National Key R&D Program of China[2021YFB3702503] ; National Natural Science Foundation of China[51927801] ; National Natural Science Foundation of China[U2032205] ; National Science and Technology Major Project[Y2019-VII-0011-0151] ; National Science and Technology Major Project[2019-VII-0019-0161]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001363140700001
出版者	ELSEVIER
引用统计	被引频次：3[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/321006/191778
专题	中国科学院金属研究所
通讯作者	Chen, Kai; Liang, Jingjing; Li, Jinguo
作者单位	1.Xi An Jiao Tong Univ, Ctr Adv Mat Performance Nanoscale CAMP Nano, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China 3.Indian Inst Technol, Dept Mat Sci & Engn, New Delhi 110016, India 4.Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore
推荐引用方式 GB/T 7714	Ren, Chenyu,Chen, Kai,Liang, Jingjing,et al. Microstructural evolution and its influence on the wear resistance of a laser directed energy deposited Ni-based single crystal superalloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2025,205:127-138.
APA	Ren, Chenyu,Chen, Kai,Liang, Jingjing,Narayan, R. Lakshmi,Ramamurty, Upadrasta,&Li, Jinguo.(2025).Microstructural evolution and its influence on the wear resistance of a laser directed energy deposited Ni-based single crystal superalloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,205,127-138.
MLA	Ren, Chenyu,et al."Microstructural evolution and its influence on the wear resistance of a laser directed energy deposited Ni-based single crystal superalloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 205(2025):127-138.