|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Late News Poster Session
||NOW ON-DEMAND ONLY: F-42: Study of the Sub-surface Thermal and Plastic Strain Distribution during Laser Shock Peening of Aerospace Grade Alloys – Simulation and Experiments
||Ayan Bhowmik, Varad Vijendra Choudhari, Niroj Maharjan
|On-Site Speaker (Planned)
Laser shock peening produces compressive stresses deep below the metallic surface thereby improving fatigue and corrosion lives of structural components. Laser shock peening, is essentially a mechanical peening process and by the virtue being carried out in a submerged medium with protective overlay, does not induce significant thermal effects on specimens. However, high strain rates due to laser impingement could be accompanied by a temperature rise in sub-surface regions. In this work we conduct combined experimental and simulation-based investigation to understand the individual effect of plastic strain due to shock wave-deformation and any possible accompanying sub-surface thermal effects We choose Ti- and Ni-based alloys, both of which are used extensively in the aerospace sector. The distribution and effect of thermal field would be assessed using physics-based model simulations and the microstructural signature of the thermal and strain fields is validated through experimental characterisation of the structure at appropriate length scales.
||Characterization, Surface Modification and Coatings, Modeling and Simulation