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Study on the microstructure, mechanical property and residual stress of SLM Inconel-718 alloy manufactured by differing island scanning strategy
Lu, Yanjin; Wu, Songquan; Gan, Yiliang; Huang, Tingting; Yang, Chuanguang; Lin Junjie; Lin, Jinxin; franklin@fjirsm.ac.cn
2015
Source PublicationOPTICS AND LASER TECHNOLOGY
ISSN0030-3992
Volume75Pages:197-206
AbstractInconel-718 has received an extensive using in mold industry. The selective laser melting (SLM) is providing an ideal means for manufacturing mold insert with complex geometrical features and internal architecture. During the manufacturing of high quality mold inserts with conformal cooling channel, the parameters play a vital role in the SLM process. In the study, the Inconel-718 alloys were manufactured by SLM with 2 x 2 mm(2), 3 x 3 mm(2), 5 x 5 mm(2), and 7 x 7 mm(2) island scanning strategies. The microstructure, mechanical property, and residual stress were investigated by optical microscope, tensile test and Vickers micro-indentation, respectively. It can be found that the relative density increased with enlarging the island size; the results on the microstructure indicated that the cracks and more pores were detected in the 22-specimen; whilst the microstructures of all specimens were composed of fine dendritic grains, cellular, and columnar structures; the tensile testing suggested that the ultimate tensile strength and yield strength of all samples was similar; while the outcome of the residual stress showed that the value of residual stress was ranked in the following sequence: 22-specimen < 55-specimen < 77-specimen < 33-specimen. Although the 22-specimen had lower residual stress compared with the other groups, the occurrence of cracks limited its processing application in SLM. Through integrated into account, the 55-scanning strategy is a promising candidate for manufacturing of mold inserts. (C) 2015 Elsevier Ltd. All rights reserved.
description.department[lu, yanjin ; wu, songquan ; gan, yiliang ; huang, tingting ; lin junjie ; lin, jinxin] chinese acad sci, fujian inst res struct matter, key lab optoelect mat chem & phys, fuzhou 350002, peoples r china ; [yang, chuanguang] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordIsland Scanning Strategy Inconnel-718 Selective Laser Melting Residual Stress Mechanical Property
Funding OrganizationFujian Major Project [2013HZ0003-2]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75146
Collection中国科学院金属研究所
Corresponding Authorfranklin@fjirsm.ac.cn
Recommended Citation
GB/T 7714
Lu, Yanjin,Wu, Songquan,Gan, Yiliang,et al. Study on the microstructure, mechanical property and residual stress of SLM Inconel-718 alloy manufactured by differing island scanning strategy[J]. OPTICS AND LASER TECHNOLOGY,2015,75:197-206.
APA Lu, Yanjin.,Wu, Songquan.,Gan, Yiliang.,Huang, Tingting.,Yang, Chuanguang.,...&franklin@fjirsm.ac.cn.(2015).Study on the microstructure, mechanical property and residual stress of SLM Inconel-718 alloy manufactured by differing island scanning strategy.OPTICS AND LASER TECHNOLOGY,75,197-206.
MLA Lu, Yanjin,et al."Study on the microstructure, mechanical property and residual stress of SLM Inconel-718 alloy manufactured by differing island scanning strategy".OPTICS AND LASER TECHNOLOGY 75(2015):197-206.
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