Additive manufacturing of a novel Ti-Al-V-Fe alloy using selective laser melting

作者：Azizi Hamid; Zurob Hatem; Bose Bipasha; Ghiaasiaan S Reza; Wang Xiang; Coulson Simon; Duz Vlad; Phillion A B^*

来源：Additive Manufacturing, 2018, 21: 529-535.

DOI：10.1016/j.addma.2018.04.006

• Rapid solidification
• Selective laser melting
• Powder processing
• Titanium alloys
• Solidification microstructure

Ti-1Al-8V-5Fe (Ti-185) and other Fe containing beta-Ti alloys are attractive because of their high strength and low cost. These alloys, however, cannot be produced through ingot casting due to strong Fe segregation and the formation of beta flecks. Selective Laser Melting (SLM) was successfully used to produce Ti-185 components starting from elemental Ti and Fe powders, and an Al-V master alloy powder with irregular shape. Microstructure analysis of the as-built components demonstrated that SLM can be used to produce a very fine grain microstructure with nano-scale precipitates and non-detrimental Fe segregation. The findings are interpreted in terms of the rapid solidification conditions during SLM. Compression test results reveal that ultra-high strength and reasonable ductility can be achieved in the as-built as well as heat treated samples.

• 出版日期2018-5