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Title: Effect Of Shot Peening On Fatigue Performance Of Two Titanium Alloys
Author: H. Bae, B. Flinn, M. Ramulu, G. Weber and H. Diep
Source: Conf Proc: ICSP-10 Tokyo, Japan 2008
Publication year 2008
Document number: 2008100
Number of pages: 6
Abstract:
ABSTRACT
The aerospace industry has taken interest in Ti 5Al-5Mo-5V-3Cr (Ti5553) for use in fatigue critical applications. To more fully understand the underlying fatigue mechanisms,
Ti5553 was compared to the baseline alloy Ti 6Al-4V (Ti64) under cyclic loading conditions. This paper addresses the performance of as-machined and as-peened smooth round
fatigue specimens of both alloys, including fatigue data, surface roughness, fractography and metallography. Surface topography of asmachined samples showed higher roughness
values for Ti-5553 than Ti64, and the Ti5553 exhibited higher S-N plot scatter than Ti64. However, consistent fatigue behavior was demonstrated for the as-peened specimens.
Fracture surfaces indicated standard fatigue and ductile failure modes. Shot peening process increased fatigue life of Ti5553 and Ti64 with increasing surface hardening and
surface roughness.
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This page last revised: 03/22/2010