FATIGUE RESISTANCE OF POWDER METALLURGY Ti-6A1-4V ALLOY

• Published in: Strength of materials Vol. 36; no. 3; pp. 225 - 230
• Main Authors: Ivasishin, O M, Bondareva, K A, Gerasimchuk, V I Bondarchuk~~~ O N, Savvakin, D G, Gryaznov, B A
• Format: Journal Article
• Language: English
• Published: 01-05-2004
• ISSN: 0039-2316

Fatigue-resistance characteristics of Ti-6Al-4V alloy synthesized by the simplest powder metallurgy method involving the processes of pressing and sintering of blended elemental titanium hydride-based powders were studied. Powder materials have a relatively fine-grain (3-phase, which despite the presence of residual pores, makes for quite a high fatigue limit (500 MPa) comparable to that of the corresponding cast alloys. Fatigue cracks in the powder alloys are initiated from such stress raisers as major pores open to the surface of the specimen gauge length. Along with a significant decrease in the production costs of titanium alloys and articles of them, the use of this method provides obtaining materials with satisfactory static and dynamic mechanical characteristics suitable for practical applications.