Crystal plasticity analysis on microscopic deformation behavior of Ti-6Al-4V alloy with cyclic loading

Abstract

Fatigue failure is considered to involve the accumulation of atomic vacancies, but its behavior is still unknown. In this study, we investigate the accumulation of atomic vacancies in α-titanium alloy single crystal specimens with microscopic cracks during fatigue deformation by using a crystal plasticity analysis code. Results show that slip in the forward and backward direction take place almost constantly and repeatedly in narrow regions near the crack tip. This activity causes the accumulation of atomic vacancies at the crack tip.