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Comparison of the microstructures and mechanical properties of Ti-6Al-4V fabricated by selective laser melting and electron beam melting
Zhao, Xiaoli; Li, Shujun; Zhang, Man; Liu, Yandong; Sercombe, Timothy B.; Wang, Shaogang; Hao, Yulin; Yang, Rui; Murr, Lawrence E.; shjli@imr.ac.cn
2016
Source PublicationMATERIALS & DESIGN
ISSN0261-3069
Volume95Pages:21-31
AbstractThe microstructure and mechanical properties of SLM and EBM Ti-6Al-4V samples have been compared. The effect of part size and orientation on the defects, microstructure and their contribution to the tensile and fatigue properties were elucidated. As-fabricated SLM and EBM samples mainly consisted of alpha' and alpha + beta phases, respectively. Pores were the main defects in SLM and EBM samples, and closely related to scanning strategies and energy input. The porosity of SLM samples was higher compared to EBM samples. The part size had an obvious influence on the microstructure and mechanical properties of EBM samples but less so for SLM samples. Both SLM and EBM samples possessed higher strength and better ductility in the vertical orientation than those in the horizontal orientation. The tensile strength of SLM samples was significantly greater than that of EBM samples whereas the ductility was much lower. Due to the pores contained in samples, fatigue strength of both EBM and SLM samples was lower than those of cast and annealed alloys. However, hot isostatic pressing (HIP) significantly increased the fatigue limits of both SLM and EBM samples to above 550 MPa by closing of the pores. (C) 2015 Published by Elsevier Ltd.
description.department[zhao, xiaoli ; zhang, man ; liu, yandong] northeastern univ, sch met & mat, minist educ, key lab anisotropy & texture mat, shenyang 110819, peoples r china ; [li, shujun ; wang, shaogang ; hao, yulin ; yang, rui] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [sercombe, timothy b.] univ western australia, sch mech & chem engn, crawley, wa 6009, australia ; [murr, lawrence e.] univ texas el paso, dept met & mat engn, el paso, tx 79968 usa
KeywordSlm Ebm Ti-6al-4v Microstructure Mechanical Properties Comparison
Funding Organization863 Project [2015AA033702]; National Basic Research Program of China [2012CB619103, 2012CB933901, 2012CB933902]; National Natural Science Foundation of China [51271182, 51271180, 51401048]; Fundamental Research Funds for the Central Universities [N140204004]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74677
Collection中国科学院金属研究所
Corresponding Authorshjli@imr.ac.cn
Recommended Citation
GB/T 7714
Zhao, Xiaoli,Li, Shujun,Zhang, Man,et al. Comparison of the microstructures and mechanical properties of Ti-6Al-4V fabricated by selective laser melting and electron beam melting[J]. MATERIALS & DESIGN,2016,95:21-31.
APA Zhao, Xiaoli.,Li, Shujun.,Zhang, Man.,Liu, Yandong.,Sercombe, Timothy B..,...&shjli@imr.ac.cn.(2016).Comparison of the microstructures and mechanical properties of Ti-6Al-4V fabricated by selective laser melting and electron beam melting.MATERIALS & DESIGN,95,21-31.
MLA Zhao, Xiaoli,et al."Comparison of the microstructures and mechanical properties of Ti-6Al-4V fabricated by selective laser melting and electron beam melting".MATERIALS & DESIGN 95(2016):21-31.
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