14th International Conference on Shot Peening

Crystal Plasticity Evaluation of Laser Peening Strengthening Effects on High-Cycle Fatigue Properties of AA2195-T6 Friction Stir Welded Joints

Maziar Toursangsaraki, Yongxiang Hu

State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China – huyx@sjtu.edu.cn

Introduction

To optimize surface treatment procedures, their strengthening mechanisms need to be evaluated on the material mechanical properties. This way, material surface modification methods can be better functionalized in high-strength lightweight structures.

Objectives

Microstructure-sensitive investigations can be conducted to understand the mechanism behind the strengthening effects of evolutions in material microstructure under the surface modification processes. For this purpose, physics-based relations are employed with crystal plasticity constitutive equations to quantify the strengthening effects of material microstructural attributes on its elastic/plastic deformation behavior. This study incorporates physics-based material modeling methods and experimental approaches under the crystal plasticity finite element framework to evaluate the mechanisms behind improvements in high-cycle fatigue properties of the AA2195-T6 friction stir welded joints after applying multiple laser peening layers.