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

doi:10.1016/j.matdes.2020.109042

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	Small punch creep performance of heterogeneous microstructure dominated Inconel 718 fabricated by selective laser melting
	Wang, L. Y.1,3; Wang, Y. C.1,3; Zhou, Z. J.2; Wan, H. Y.1,3; Li, C. P.2; Chen, G. F.2; Zhang, G. P.1
刊名	MATERIALS & DESIGN
	2020-10-01
卷号	195 页码:15
关键词	Inconel 718 Small punch creep test Selective laser melting Cracking
ISSN号	0264-1275
DOI	10.1016/j.matdes.2020.109042
通讯作者	Zhang, G. P.(gpzhang@imr.ac.cn)
英文摘要	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/).
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
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000576531100011
资助机构	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
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/140882]
专题	金属研究所_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.Siemens Ltd, Corp Technol, Mat & Mfg Qualificat Grp, Beijing 100102, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, 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.