Abstract
High-performance manufacturing is an integrated manufacturing of surface integrity and anti-fatigue surface strengthening to improve the service performance of key components. The stress concentration, fatigue failure and poor reliability cause by traditional processing have become technical bottlenecks restricting the development of industry. In order to research the influence of high performance manufacturing on the fatigue performance of workpieces, the residual stress distribution of 7050 aluminum alloy high performance manufacturing was studied by simulation. The stress layer on the surface of the workpiece was mainly tensile stress which was formed during cutting process, and it implied that the fatigue resistance of the workpiece was not effectively improved. The ultrasonic rolling strengthening treatment can effectively eliminate the residual tool marks and stress concentration. It was noted that stress layer of ultrasonic rolling was deeper than the cutting process, and the stress layer was mainly composed of residual compressive stress. The residual stress increased first and then decreased with the increased of depth, which can significantly improve the fatigue performance and service life of the workpiece.
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