The surface performance of shot peened and ion implanted NiTi shape memory alloy |
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| Affiliation: | 1. Baylor College of Medicine, Houston, Texas 77002, United States;2. Stanford University, California, United States;3. The University of Houston Clear Lake, Houston, Texas 77057, United States;1. Chair of Applied Laser Technologies, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany;2. Institute for Materials, Ruhr-Universität Bochum, Universitätsstr. 150, 44801 Bochum, Germany;3. Evonik Chair of Organic Chemistry, Ruhr-Universität Bochum, ZEMOS, Universitätsstr. 150, 44801 Bochum, Germany;4. Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China;1. School of Mechanical Engineering, Shandong University of Technology, Zibo, 255000, China;2. Center of Testing and Analysis, Shandong University of Technology, Zibo, 255000, China;1. Vanderbilt Children''s Hospital, Vanderbilt University, Nashville, TN, USA;2. West Virginia University School of Medicine, Charleston Division, Charleston, WV, USA;3. Department of Pediatrics, CAMC Women and Children''s Hospital, Charleston, WV, USA;4. Department of Pediatric Pulmonology, CAMC Women and Children''s Hospital, Charleston, WV, USA;5. Department of Pediatric Nephrology, CAMC Women and Children''s Hospital, Charleston, WV, USA;1. School of Materials Science and Engineering, Anhui University of Technology, Maanshan, 243032, China;2. Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Ministry of Education, Anhui University of Technology, Maanshan, 243032, China;3. Jiangxi Key Laboratory of Advanced Copper and Tungsten Materials, Jiangxi Academy of Sciences, Nanchang, 330029, China;4. Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing Institute of Technology, Nanjing, Jiangsu, 211167, China;1. State Key Laboratory of Advanced Special Steels, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;2. Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;3. Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, 85 Wujin Road, Shanghai 200080, China;4. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jingshi Road 17923, Jinan, 250061, China;5. Trinity College Dublin, the University of Dublin, Department of Mechanical and Manufacturing Engineering, Parsons Building, Dublin 2, Ireland |
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| Abstract: | Equiatomic NiTi shape memory alloy in austenitic and martensitic forms has been modified by shot peening with glass media and by N+ ion implantation. The effect upon microstructure, surface hardness and coefficient of friction was measured, along with the effect of the two treatments upon the shape memory behaviour. Examination using transmission electron microscopy (TEM) showed amorphous regions within the surfaces treated by both peening and ion implantation. In addition, peened and ion implanted samples showed similar increases in surface hardness and reduced surface friction coefficient. Differential scanning calorimetry showed that both surface treatments had no effect upon the bulk shape memory phase transformation behaviour. |
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