期刊
JOM
卷 69, 期 12, 页码 2684-2692出版社
SPRINGER
DOI: 10.1007/s11837-017-2581-6
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资金
- Monash Centre for Additive Manufacturing (MCAM)
- Australia Research Council [IH130100008]
- Australian Postgraduate Awards (APA)
- International Postgraduate Research Scholarship (IPRS)
- Monash Centre of Electron Microscopy
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.
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