Effect of lapping on the fatigue strength of a hardened 13Cr-0.34C stainless steel |
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| Affiliation: | 1. University of Brasília, Department of Mechanical Engineering, Brasília CEP 70910-900, Brazil;2. Ghent University, Dept. EEMMeCS, Soete Laboratory, Technologiepark Zwijnaarde 903, 9052 Zwijnaarde, Belgium;1. School of Railway Tracks and Transportation, Wuyi University, Jiangmen 529020, China;2. Tribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China;3. Sichuan University of Science & Engineering, School of Materials Science and Engineering, Zigong 643000, China;4. School of Mechanical and Electric Engineering, Guangzhou University, Guangzhou 510006, China;1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;3. Department of Civil and Structural Engineering, the University of Sheffield, Sheffield S1 3JD, UK |
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| Abstract: | Reversed plane-bending fatigue tests were carried out on 13Cr-0.34C stainless steels, heated treated to two hardness levels. Their surfaces were prepared by grinding and lapping according to the procedure actually used in the production of compressor valves. It was found that the larger compressive residual stresses in the subsurfaces produced by lapping raised the fatigue strength in spite of the increased surface roughness and the embedding of lapping particles, the latter being effective in reducing wear. |
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