METALS AND METAL MATRIX COMPOSITES |
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Surface Integrity for Machining Aerospace Parts |
CHU Mingqiang1, DING Rengen1, ZHANG Shuyan1,2, ZHENG Jiangpeng1, ZHANG Nan1
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1 Centre of Excellence for Advanced Materials, Dongguan 523808, China 2 Materials Laboratory of Songshan Lake, Dongguan 523808, China |
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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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Published: 22 April 2021
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Fund:Program for Guangdong Introducing Innovative and Enterpreneurial Teams (2016ZT06G025) and Guangdong Natural Science Foundation (2017B030306014) |
About author:: Mingqiang Chu, a distinguish research fellow, gradua-ted from Tongji University in Shanghai in 1987, and later obtained her Ph.D. from University of Birmingham UK. She has worked in metallurgy & material field in UK for nearly 20 years, mainly engaged in material research and development, microstructure characterization, process performance verification, etc., and published more than 40 papers. In 2013, she was back to China and appointed as an overseas talent of COMAC, gain Shanghai Pujiang Talent Program and Shanghai Major Talent Project. She is currently the deputy director of Material Institute in Dongguan Center of Excellence for Advanced Materials. She hosted and participated in more than 20 scientific research projects and industrial projects. As chief editor published a book of Aircraft Material and Structure Testing Technology. Shuyan Zhang, received her Ph.D. degree in enginee-ring science from University of Oxford in 2008, then worked as the principal scientist at ISIS Engineering Laboratory for many years. In 2016, she founded the Center of Excellence for Advanced Materials (CEAM) in Dongguan China, as the director of CEAM. She is a visiting professor at the Open University UK, consultant for STFC, member of MECASENS International Science & Technology Advisory Board and of National Residual Stress Academic Committee of China, the editor of The European Physical Journal Plus. She has been working on the residual stress analysis and micromechanical properties of engineering materials by neutron and X-ray diffraction for many years. She presided over the design, technical improvement and construction of a neutron spectrometer at China Spallation Neutron Source and UK Spallation Neutron Source respectively. |
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