Improvement of the properties of Ti-6Al-7Nb alloy by metal injection molding

Yoshinori Itoh, Hideshi Miura, Toshiaki Uematsu, Kenji Sato, Mitsuo Niinomi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Ti-6Al-7Nb alloy has been developed as a more suitable biomaterial to replace Ti-6Al-4V alloy because the vanadium is toxic to the human body. The metal injection molding process was applied to produce the Ti-6Al-7Nb alloy from two types of mixed elemental powders of Ti, Al and Nb. The first type consisted of a fine Al powder, while the second type consisted of a coarse Al powder. The effects of Al particle size and sintering conditions on the microstructure, relative density and mechanical properties of injection molded compacts were investigated. The sintered compacts using fine Al powder showed higher density and improved mechanical properties as compared to the compacts using coarse Al powder. The sintered compacts using coarse Al powder showed many relatively large pores in the microstructure because of the dissolution of Al particles during sintering, but these pores were reduced when using the fine Al powder. Eventually, the compacts using fine Al powder achieved a tensile strength of 770MPa with 12% elongation due to the reduction of large pores in the microstructures.

Original languageEnglish
Title of host publicationAdvances in Powder Metallurgy and Particulate Materials - 2007, Proceedings of the 2007 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2007
Pages481-486
Number of pages6
Publication statusPublished - 2007 Dec 1
Event2007 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2007 - Denver, CO, United States
Duration: 2007 May 132007 May 16

Other

Other2007 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2007
CountryUnited States
CityDenver, CO
Period07/5/1307/5/16

ASJC Scopus subject areas

  • Metals and Alloys
  • Surfaces and Interfaces

Fingerprint Dive into the research topics of 'Improvement of the properties of Ti-6Al-7Nb alloy by metal injection molding'. Together they form a unique fingerprint.

Cite this