Effect of Vibration Stress Relief on the Shape Stability of Aluminum Alloy 7075 Thin-Walled Parts

Hai Gong,Yunxin Wu,Yanjie Sun,Minghai Zhang,Xiaoliang Sun,Yipeng He,Yaoqiong Liu

doi:10.3390/met9010027

Abstract

Aluminum alloy 7075 is one of the materials widely used in the manufacture of structural components used by aviation industries. High precision is required in producing the shapes of such components due to shape stability and dimensional accuracy being difficult to maintain throughout the different stages of manufacturing. In this work, an experimental study of the effect of VSR (Vibratory Stress Relief) on the deformation and residual stresses of aluminum alloy 7075 thin-walled components is presented. It was concluded that VSR improved the shape and size stability of the material to a significant level by relieving induced residual stresses in the thin-walled parts. Finally, more uniform residual stress distribution was obtained after the VSR treatment, compared to before the VSR treatment. This proved that VSR has a significant influence on improving the shape stability of the thin-walled aluminum alloy 7075 components.

Highlights

Aluminum alloy materials are widely used in the manufacture of aerospace components such as frameworks, wings, etc
Research on the theshape shapeand andsize size thin‐walled parts a foundation forexploration the exploration of Research on of of thin-walled parts layslays a foundation for the of large large aircraft components, which provides a mean for exploring vibration stress relief method to aircraft components, which provides a mean for exploring vibration stress relief method to improve improve shape of stability aircraft components
There will be no residual stress to be generated if such slippage can be accomplished on the slip surface

Summary

Introduction

Aluminum alloy materials are widely used in the manufacture of aerospace components such as frameworks, wings, etc. These parts are usually manufactured from heat treated, thick aluminum alloy plates which are processed through milling and other manufacturing procedures. The influence of heat treatment temperature fields, clamping method, heat generated during machining and the stresses developed during the milling process, result in the inevitable development of residual stress in the manufactured parts, which may accelerate fatigue failure, cause stress corrosion and deformation of construction. With the development of high-speed milling technology, proper attention has been given to the study of induced stresses and processing parameters of aeronautical aluminum alloy thin-walled parts instead of their dimensional deformation. Dong [3,4] studied the effect of clamping position and clamping method on the developed stresses in thin-walled parts during machining; the clamping method of the workpiece was optimized by using simulation method

Results

Discussion

Conclusion