Shakedown of deep cold rolling residual stresses in titanium alloys

This paper presents measurements of the shakedown of the compressive residual stresses produced by deep cold rolling caused by low cycle fatigue of the titanium alloys Ti-6Al-4V and IMI679 at room temperature and elevated temperature, respectively. The loads and temperatures were designed to replicate the most extreme conditions expected in the compression stages of a gas turbine engine. Measurements were made using a technique combining XRD and hole drilling.