Abstract The aim of this study is to improve the properties of titanium aluminide alloys as one of the materials whose application is growing rapidly due to its excellent mechanical properties. Laser Shock Peening is one of the best effective technologies to improve the mechanical properties and fatigue of materials. This makes it more effective and cheaper by theoretically evaluating the factors influencing the occurrence of the practical process. In this regard, ABAQUS software is used to investigate the effect of the type and thickness of the adsorbent layer on the penetration depth and strength of the shock wave generated in the material. It is found that graphite is a suitable adsorbent layer in the laser shock process due to its higher density and better mechanical properties for transmitting shock waves and also having a higher absorption coefficient. In addition, the optimal thickness of the adsorbent layer in the titanium aluminide laser shock process is obtained using the Vogel model and measuring the radius of the plasmasphere. The optimum thickness for graphite material at energy density of 1.6 GW.cm?2 is equal to 20?μm. Accordingly, if the thickness of the adsorbent layer is less than this value, the produced plasma will damage the surface of the material, and due to the incomplete formation of the plasmasphere, the strength of the shock wave will be reduced.
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