Abstract
This paper discusses the investigation of residual stresses
developed as a result of mechanical and laser forming
processes in commercially pure grade 2 Titanium alloy plates
as well as the concept of total fatigue stress. The intention of
the study was to bend the plates using the respective processes
to a final radius of 120mm using both processes. The hole
drilling method was used to measure residual strains in all the
plates. High stress gradients were witnessed in the current
research and possible cases analyzed and investigated. The
effects of processing speeds and powers used also played a
significant role in the residual stress distribution in all the
formed plates. A change in laser power resulted in changes to
residual stress distribution in the plates evaluated. This study
also dwells into how the loads that are not normally
incorporated in fatigue testing influence fatigue life of
commercially pure grade 2 Titanium alloy plates...