Beta Titanium Alloys in the 80's

Author:  R. R. Boyer, R. Bajoraitis, D. W. Greenwood, & E.E. Mild
Source:  Publication of The Metallurgical Society of AIME
Doc ID:  1983051
Year of Publication:  1983
Abstract:  
Presently high strength titanium alloy springs are fabricated from Ti-13V-11Cr-3Al. This has been a satisfactory spring material but it is a very difficult alloy to fabricate into wire, from the standpoints of melting and conversion from ingot to billet to hot roll stock to final wire size. This results in limited sources, high cost and, at times, lead time problems. Ti-3Al-8V-6Cr-4Mo-4Zr is an alloy developed by RMI which should present fewer fabrication problems which translates to lower cost, with fatigue properties equivalent or superior to the Ti-13-V-11Cr-3Al alloy. An extensive program was undertaken to evaluate the fatigue characteristics as a function of processing, Data will be presented correlating fatigue properties to the amount of cold work, grain size, surface finish, tensile strength and shot-peening intensity. Comparisons to Ti-13V-11Cr-3Al processed in accordance with AMS 4959 will be made.