Abstract: In the aerospace industry, titanium and nickel-based alloys are important metal materials for aircraft structures and engine components. These critical structural components are manufactured to meet high reliability requirements, and surface integrity is one of the most relevant parameters for evaluating the quality of finished surfaces. The residual stresses and surface changes produced by titanium and nickel-based alloys during processing are critical to their safety and sustainability. This paper reviews the research progress on the surface integrity of titanium alloys and nickel-based alloys, and reports on many different types of surface integrity problems, including the study of surface residual stress, white layer and work hardened layer, and microstructure changes to improve the final surface quality of the product. Many parameters affect the surface qua-lity of the workpiece, where cutting speed, feed rate, depth of cut, tool geometry and machining process, tool wear and workpiece performance are among the most worthwhile issues. In order to better understand the surface integrity introduced by processing, experimental and empirical studies as well as methods based on analysis and finite element modeling are required. However, at the current state of the art, there is still a lack of a comprehensive, systematic approach based on physical process that is suitable for industrial processes. The results show that while explaining the effects of various parameters on the processing of titanium alloys and nickel-based alloys, it is necessary to establish a predictive physical model consistent with reliable experiments.
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