Fatigue peculiarity of metals treated by laser shock impact

The work is devoted to experimental investigation of laser shock peening (LSP) effect on the thermo-mechanical properties of metals. ARMCO-iron and Titanium Grade 2 are chosen for the study. Samples were subjected to laser shock peening. After that, investigation of residual stress on heat generation during fatigue loading was performed. To study the damage-induced heating the fatigue tests were coupled with infrared thermography measurements. The results of the study have shown that LSP procedure qualitatively changes temperature evolution in both materials under cyclic loading. The heating (energy dissipation) of specimens after LSP was several times higher than in initial state. (C) 2022 The Authors. Published by Elsevier B.V.

Automated summary

This work focuses on investigating the impact of laser shock peening (LSP) on the thermo-mechanical properties of metals. ARMCO-iron and Titanium Grade 2 were used as the materials of interest. After undergoing LSP, the residual stress and heat generation during fatigue loading were examined. The results showed that LSP qualitatively altered the temperature evolution under cyclic loading in both materials, with significantly increased heating (energy dissipation) compared to the initial state.