Microstructure, defects and mechanical behavior of beta-type titanium porous structures manufactured by electron beam melting and selective laser melting

IMR OpenIR

	Microstructure, defects and mechanical behavior of beta-type titanium porous structures manufactured by electron beam melting and selective laser melting
	Liu, Y. J.; Li, S. J.; Wang, H. L.; Hou, W. T.; Hao, Y. L.; Yang, R.; Sercombe, T. B.; Zhang, L. C.; Zhang, LC (reprint author), Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia.; Li, SJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
	2016-07-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	113 页码:56-67
摘要	This study investigates the differences in the microstructure, defects and mechanical behavior of porous structures from a beta-type Ti-24Nb-4Zr-8Sn manufactured by electron beam melting (EBM) and selective laser melting (SLM). The phases, size and shape of melt pool, volume and distribution of defects are analyzed and correlated to the compressive mechanical and fatigue properties. Due to different powder bed temperatures, the microstructure of EBM and SLM samples consists of alpha+beta phases and a single phase, respectively. The faster cooling rate during SLM promotes the formation of fine beta dendrites, which leads to a higher compressive strength (50 +/- 0.9 MPa) and lower Young's Modulus (0.95 +/- 0.05 GPa) in comparison to the EBM parts (45 +/- 1.1 MPa and 1.34 +/- 0.04 GPa respectively). The large defects present within solid strut are likely a result of tin vaporization. The tin vapor is more easily trapped during the SLM process due to a smaller laser spot size and a faster cooling rate. This results in a 10 times increase in the number of defects. These defects have a limited influence on both the static properties and low stresses level fatigue strength, but it causes a reduced and variable fatigue life at high stresses level. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[liu, y. j. ; zhang, l. c.] edith cowan univ, sch engn, 270 joondalup dr, perth, wa 6027, australia ; [liu, y. j. ; li, s. j. ; wang, h. l. ; hou, w. t. ; hao, y. l. ; yang, r.] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china ; [sercombe, t. b.] univ western australia, sch mech & chem engn, 35 stirling highway, perth, wa 6009, australia
关键词	Selective Laser Melting Electron Beam Melting Titanium Alloys Mechanical Properties Porous Structures
学科领域	Materials Science ; Metallurgy & Metallurgical Engineering
资助者	863 Project [2015AA033702]; National Basic Research Program of China [2012CB619103, 2012CB933901]; National Natural Science Foundation of China [51271182, 51271180]; Australian Research Council [DP110101653, DP130103592]; ECU-IPRS Scholarship
收录类别	sci
语种	英语
WOS记录号	WOS:000378670300007
引用统计	被引频次：476[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/321006/75804
专题	中国科学院金属研究所
通讯作者	Zhang, LC (reprint author), Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia.; Li, SJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
推荐引用方式 GB/T 7714	Liu, Y. J.,Li, S. J.,Wang, H. L.,et al. Microstructure, defects and mechanical behavior of beta-type titanium porous structures manufactured by electron beam melting and selective laser melting[J]. ACTA MATERIALIA,2016,113:56-67.
APA	Liu, Y. J..,Li, S. J..,Wang, H. L..,Hou, W. T..,Hao, Y. L..,...&Li, SJ .(2016).Microstructure, defects and mechanical behavior of beta-type titanium porous structures manufactured by electron beam melting and selective laser melting.ACTA MATERIALIA,113,56-67.
MLA	Liu, Y. J.,et al."Microstructure, defects and mechanical behavior of beta-type titanium porous structures manufactured by electron beam melting and selective laser melting".ACTA MATERIALIA 113(2016):56-67.