Test Results for Wrought and AM In718 Treated by Shot Peening and Laser Peening Plus Thermal Microstructure Engineering

Abstract

Fatigue improvement by shot peening and laser peening on additive manufacturing. Fatigue life improvement by shot peening (SP) and laser peening (LP) on metals is already well known. However, we are short of information about results on manufacturing (AM) parts, which are characterized by bad surface finishing, micro-porosities and structural defects. This paperstudies the effects of SP and LP on AM In718. Residual stress profiles, fractures surface, fatigue results will be detailed. Different thermal microstructure and surface preparations are compared: raw AM, SP, LP, polished.