| Toward qualification of additively manufactured metal parts: Tensile and fatigue properties of selective laser melted Inconel 718 evaluated using miniature specimens | |
| Wan, H. Y.1; Yang, W. K.1,2; Wang, L. Y.1,2; Zhou, Z. J.3; Li, C. P.3; Chen, G. F.3; Lei, L. M.4; Zhang, G. P.1 | |
| Corresponding Author | Zhang, G. P.(gpzhang@imr.ac.cn) |
| 2022-01-20 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| ISSN | 1005-0302 |
| Volume | 97Pages:239-253 |
| Abstract | Combined with the topology optimization, additive manufacturing can be used to fabricate metal parts with complex shapes. However, due to the geometrical variations and microstructure heterogeneities of the additively manufactured metal parts, new standards with the use of miniature specimens are required for the evalutation of the spatial distribution of mechanical properties throughout the parts. Here, we conduct a systematic investigation on tensile and fatigue properties of selective laser melted Inconel 718 specimens with different thicknesses ranging from 0.1 mm to 1 mm. A "microstructure unit" that can well reflect the microstructure characteristic of selective laser melted materials is defined. The results reveal that premature necking with a dramatic drop in uniform elongation occurs if the ratio ( t/d ) of specimen thickness ( t ) to the "microstructure unit" size ( d ) is less than one. Premature necking is mainly attributed to the transition of strain localization behavior. We also propose a probabilistic statistical model for fatigue limit prediction based on the available fatigue data. It is recommended that the criterion of t/d >= 4 should be satisfied to ensure that the yield strength, the uniform elongation, and the fatigue limit determined by the miniature specimens are comparable with those determined by standard specimens. The findings may provdie a guide to the establishment of miniature specimen-based standards toward the qualification of additively manufactured metal parts. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| Keyword | Selective laser melting Inconel 718 Miniature specimen Microstructure unit Thickness effect |
| Funding Organization | National Natural Science Foundation of China (NSFC) ; Fundamental Research Project of Shenyang National Laboratory for Materials Science |
| DOI | 10.1016/j.jmst.2021.04.049 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China (NSFC)[51771207] ; Fundamental Research Project of Shenyang National Laboratory for Materials Science[L2019R18] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000737281400004 |
| Publisher | JOURNAL MATER SCI TECHNOL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/173797 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhang, G. P. |
| Affiliation | 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 4.AECC Shanghai Commercial Aircraft Engine Mfg Co L, Shanghai 201306, Peoples R China |
| Recommended Citation GB/T 7714 | Wan, H. Y.,Yang, W. K.,Wang, L. Y.,et al. Toward qualification of additively manufactured metal parts: Tensile and fatigue properties of selective laser melted Inconel 718 evaluated using miniature specimens[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,97:239-253. |
| APA | Wan, H. Y..,Yang, W. K..,Wang, L. Y..,Zhou, Z. J..,Li, C. P..,...&Zhang, G. P..(2022).Toward qualification of additively manufactured metal parts: Tensile and fatigue properties of selective laser melted Inconel 718 evaluated using miniature specimens.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,97,239-253. |
| MLA | Wan, H. Y.,et al."Toward qualification of additively manufactured metal parts: Tensile and fatigue properties of selective laser melted Inconel 718 evaluated using miniature specimens".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 97(2022):239-253. |
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