Journal of the Japan Society of Powder and Powder Metallurgy
Online ISSN : 1880-9014
Print ISSN : 0532-8799
ISSN-L : 0532-8799
Paper
Effect of Oxygen Content and Relative Density on the Tensile Properties of Injection Molded Ti-6Al-4V Alloy
Yoshinori ItohToshiaki UematsuKenji SatoHideshi Miura
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JOURNAL OPEN ACCESS

2009 Volume 56 Issue 5 Pages 259-263

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Abstract
The properties of sintered Ti-6Al-4V alloy compacts have been clarified by using various mixed or Ti-6Al-4V alloy powders under the various process conditions. From these studies, there were tendencies that the tensile properties of sintered Ti-6Al-4V alloy compacts were affected by oxygen content and relative density of sintered compacts rather than process conditions. In this study, the properties of injection molded Ti-6Al-4V alloy compacts obtained from previous studies were comprehensively investigated to clarify the effect of oxygen content and relative density on the tensile properties. The tensile strength of injection molded Ti-6Al-4V alloy compacts was significantly increased with increasing the oxygen content of sintered compacts up to 0.5 mass%, and the strength also increased with increasing the relative density of sintered compacts. Although the elongation of injection molded Ti-6Al-4V alloy compacts reduced drastically at above 0.35 mass% of oxygen content, they showed excellent ductility above 10 % of elongation up to 0.35 mass% of oxygen content. Eventually, the tensile strength (σ) of injection molded Ti-6Al-4V alloy compacts were greatly correlating with oxygen content (O) and relative density (ρ) of sintered compacts as shown in the experimental equation: σ (MPa)=700O (mass%)+10ρ (%)-315
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© 2009 by Japan Society of Powder and Powder Metallurgy

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