Optimization of MIM process for Ti-6Al-7Nb alloy powder

Toshiko Osada; Hideshi Miura; Yoshinori Itoh; Makoto Fujita; Nobuhiro Arimoto

doi:10.2497/jjspm.55.726

Optimization of MIM process for Ti-6Al-7Nb alloy powder

Toshiko Osada, Hideshi Miura, Yoshinori Itoh, Makoto Fujita, Nobuhiro Arimoto

Manufacturing Process

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

Ti-6Al-7Nb alloy has been developed for more suitable biomaterial in place of Ti-6Al-4V alloy because of vanadium toxicity to human body. In this study, the metal injection molding process was applied to produce the Ti-6Al-7Nb alloy compacts using alloy powder. For comparison, the mixed elemental powders of Ti, Al and Nb, and pre-alloyed powders of Ti-Al and Al-Nb were also used. The effects of sintering conditions on the microstructures, relative density and mechanical properties of injection molded compacts were investigated. Sintered compacts using alloy powder showed relatively higher mechanical properties than the compacts using mixed powder. Eventually, the compacts using alloy powder were improved to be 900 MPa of tensile strength with 15 % of elongation, which are comparable to the properties of wrought materials.

Original language	English
Pages (from-to)	726-731
Number of pages	6
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	55
Issue number	10
DOIs	https://doi.org/10.2497/jjspm.55.726
Publication status	Published - Oct 2008

All Science Journal Classification (ASJC) codes

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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abstract = "Ti-6Al-7Nb alloy has been developed for more suitable biomaterial in place of Ti-6Al-4V alloy because of vanadium toxicity to human body. In this study, the metal injection molding process was applied to produce the Ti-6Al-7Nb alloy compacts using alloy powder. For comparison, the mixed elemental powders of Ti, Al and Nb, and pre-alloyed powders of Ti-Al and Al-Nb were also used. The effects of sintering conditions on the microstructures, relative density and mechanical properties of injection molded compacts were investigated. Sintered compacts using alloy powder showed relatively higher mechanical properties than the compacts using mixed powder. Eventually, the compacts using alloy powder were improved to be 900 MPa of tensile strength with 15 % of elongation, which are comparable to the properties of wrought materials.",

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AU - Fujita, Makoto

AU - Arimoto, Nobuhiro

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Optimization of MIM process for Ti-6Al-7Nb alloy powder

Abstract

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