Defect, Microstructure, and Mechanical Property of Ti-6Al-4V Alloy Fabricated by High-Power Selective Laser Melting

被引：115
作者：
Cao, Sheng [1 ,3 ]
Chen, Zhuoer [1 ,2 ]
Lim, Chao Voon Samuel [1 ]
Yang, Kun [1 ,3 ]
Jia, Qingbo [1 ,3 ]
Jarvis, Tom [1 ,3 ]
Tomus, Dacian [4 ]
Wu, Xinhua [1 ,3 ]
机构：
[1] Monash Ctr Addit Mfg, Notting Hill, Vic 3168, Australia
[2] Monash Univ, Dept Mech & Aerosp Engn, Clayton, Vic 3800, Australia
[3] Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia
[4] Amaero Engn, Notting Hill, Vic 3168, Australia
来源：
JOM | 2017年 / 69卷 / 12期
关键词：
BEHAVIOR; EVOLUTION; MODE;
D O I：
10.1007/s11837-017-2581-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To improve the selective laser melting (SLM) productivity, a high laser power and accordingly adjusted parameters are employed to facilitate a high build rate. Three distinct processing strategies with incremental build rate are developed for SLM Ti-6Al-4V. Various types of defects are investigated. Further studies were carried out by heat-treatment and hot isostatic pressing to evaluate the influence of microstructure and porosity on mechanical properties. The anisotropic mechanical property in horizontally and vertically build samples were observed, which was attributable to the columnar grains and spatial arrangement of defects. Regardless of anisotropy, a post-SLM heat-treatment at 800A degrees C for 2 h produces a combined high strength and ductility.
引用
收藏
页码：2684 / 2692
页数：9
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