Modeling Residual Stresses Arising during Hybrid Shot and Laser Shock Peening of Ti–6Al–4V Titanium Alloy

Abstract

A hybrid surface treatment, combining shot and laser shock peening, can produce high compressive residual stresses in the near-surface region. This article develops a finite element model to study the hybrid surface hardening technology for Ti–6Al–4V biomedical titanium alloy and its effect on residual stresses. A comparison of the finite element modeling results with known experimental data is provided, demonstrating good agreement. It is shown that, compared to using either technology alone, the hybrid technology can increase the maximum depth and magnitude of compressive residual stresses by 1060 µm and 50–80 MPa, respectively.