Abstract

Surface mechanical attrition treatment (SMAT) is a method that enhances the mechanical properties of metallic materials by generating a thin nanostructured layer on the top surface. In this study, single-shot impact behavior was modeled for the 7075-T6 aluminum alloy to reach maximum values of equivalent stress, plastic strain, deformation depth, residual stress depth, and residual stress. Finite element simulations have been carried out to analyze the effect of selected parameters on stress and strains in the component. For simulating the SMAT process, a rigid sphere on a rectangular component is modeled using ANSYS/AUTODYN explicit dynamic solver. The plastic deformation process during SMAT was analyzed according to shot velocity and diameter with a dynamic explicit finite element method (FEM). The response surface methodology was used to evaluate the parametric results for the SMAT process. In addition, deformation behavior was evaluated after a single-shot impact according to the restitution coefficient.

Graphical abstract

中文翻译：

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SMAT工艺对7075-T6铝合金单冲击塑性变形行为的动态有限元分析

摘要

表面机械磨损处理（SMAT）是通过在顶面上生成薄的纳米结构层来增强金属材料的机械性能的方法。在这项研究中，对7075-T6铝合金的单发冲击行为进行了建模，以达到等效应力，塑性应变，变形深度，残余应力深度和残余应力的最大值。已经进行了有限元模拟，以分析所选参数对部件中应力和应变的影响。为了模拟SMAT过程，使用ANSYS / AUTODYN显式动态求解器对矩形组件上的刚性球建模。根据弹丸速度和直径，采用动态显式有限元方法（FEM）分析了SMAT的塑性变形过程。响应面方法用于评估SMAT过程的参数结果。此外，根据恢复系数对单次冲击后的变形行为进行了评估。

图形概要