Small punch creep performance of heterogeneous microstructure dominated Inconel 718 fabricated by selective laser melting

doi:10.1016/j.matdes.2020.109042

IMR OpenIR

	Small punch creep performance of heterogeneous microstructure dominated Inconel 718 fabricated by selective laser melting
	Wang, L. Y.1,2; Wang, Y. C.1,2; Zhou, Z. J.3; Wan, H. Y.1,2; Li, C. P.3; Chen, G. F.3; Zhang, G. P.1
通讯作者	Zhang, G. P.(gpzhang@imr.ac.cn)
	2020-10-01
发表期刊	MATERIALS & DESIGN
ISSN	0264-1275
卷号	195 页码:15
摘要	Creep performance of additively-manufactured components is strongly related to additive manufacturing process-induced microstructures and loading direction. Here, the creep life and the cracking behavior of Inconel 718 fabricated by selective laser melting were investigated systematically at 650 degrees C and 400 N by means of the small punch creep testing method. The results show that the periodic and spatially heterogeneous microstructures composed of V-shaped grains and columnar grains are produced, and play an important role in the creep performance. Under the same heat-treatment condition, the creep resistance of the specimens loaded along the scanning direction is much higher than that of the ones loaded along the building direction. While under the same loading direction, homogenization/aging-treated specimens have the longest creep life and the solution/aging-treated specimens are of the shortest creep life. The creep cracking mechanism of the alloy associated with the spatially heterogeneous microstructures was elucidated. The theoretical calculation suggests that the higher energy input or the larger overlap ratio of the melting pools may decrease the area fraction of the V-shaped grains to enhance the creep life. The finding provides a potential strategy to design microstructures for the high creep performance of selective laser melting-fabricated Inconel 718. (c) 2020 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
关键词	Inconel 718 Small punch creep test Selective laser melting Cracking
资助者	National Natural Science Foundation of China (NSFC) ; project of 'Manufacturing the swirl nozzles of the high-pressure turbine by selective laserMelting' ; Fundamental Research Project of Shenyang National Laboratory for Materials Science
DOI	10.1016/j.matdes.2020.109042
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[51771207] ; project of 'Manufacturing the swirl nozzles of the high-pressure turbine by selective laserMelting' ; Fundamental Research Project of Shenyang National Laboratory for Materials Science[L2019R18]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000576531100011
出版者	ELSEVIER SCI LTD
引用统计	被引频次：28[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/321006/140883
专题	中国科学院金属研究所
通讯作者	Zhang, G. P.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Siemens Ltd, Corp Technol, Mat & Mfg Qualificat Grp, Beijing 100102, Peoples R China
推荐引用方式 GB/T 7714	Wang, L. Y.,Wang, Y. C.,Zhou, Z. J.,et al. Small punch creep performance of heterogeneous microstructure dominated Inconel 718 fabricated by selective laser melting[J]. MATERIALS & DESIGN,2020,195:15.
APA	Wang, L. Y..,Wang, Y. C..,Zhou, Z. J..,Wan, H. Y..,Li, C. P..,...&Zhang, G. P..(2020).Small punch creep performance of heterogeneous microstructure dominated Inconel 718 fabricated by selective laser melting.MATERIALS & DESIGN,195,15.
MLA	Wang, L. Y.,et al."Small punch creep performance of heterogeneous microstructure dominated Inconel 718 fabricated by selective laser melting".MATERIALS & DESIGN 195(2020):15.