Effect of sintering parameters on mechanical properties of injection moulded Ti-6Al-4V alloys

Ergul E., GÜLSOY H. Ö., Gunay V.

POWDER METALLURGY, vol.52, no.1, pp.65-71, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 52 Issue: 1
  • Publication Date: 2009
  • Doi Number: 10.1179/174329008x271691
  • Journal Name: POWDER METALLURGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.65-71
  • Keywords: Powder injection moulding, Ti-6Al-4V alloy, Sintering, Mechanical properties, POWDER
  • Dokuz Eylül University Affiliated: Yes

Abstract

This paper describes the microstructural and mechanical properties of injection moulded Ti-6Al-4V parts. Ti-6Al-4V powder was injection moulded with wax based binder. The critical powder loading for injection moulding was 67.5 vol.-% for feedstock. Binder debinding was performed with solvent and thermal method. After debinding the samples were sintered at different temperatures and times in vacuum atmosphere (10(-4) torr). Metallographic studies were conducted to determine to extend densification and the corresponding microstructural changes. The results show that Ti-6Al-4V powder could be sintered to a maximum 99% of theoretical density. Maximum ultimate tensile strength and hardness were obtained 704 MPa and 38.6 HRC at 1275 degrees C for 10 h.