Effect of partial replacement of carbon by nitrogen on intergranular corrosion behavior of high nitrogen martensitic stainless steels |
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| Affiliation: | 1. School of Metallurgy, Northeastern University, Shenyang 110819, China;2. Corrosion and Protection Division, Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang, 110819, China;1. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Scholl of Naval Architecture & Ocean Engineering, Jiangsu Maritime Institute, Nanjing 211170, China;3. Zhejiang Provincial Key Laboratory for Cutting Tools, Taizhou Unniversity, Taizhou 318000, China;4. Primary School of Education, Chongqing Normal University, Chongqing 400700, China;5. Monash Centre for Additive Manufacturing (MCAM), Monash University, Clayton, VIC 3800, Australia;6. Jiangxi Province Engineering Research Center of Materials Surface Enhancing & Remanufacturing, School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China;1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China;2. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China;3. Department of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, 116001, China;1. College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China;2. School of Materials Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China;1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China;2. Department of Materials Science and Engineering, KTH Royal Institute of Technology, Stockholm, 10044, Sweden;3. Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing, 400044, China;1. Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;2. Department of Materials Physics and Chemistry, Harbin Institute of Technology, Harbin 150001, China;3. State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;4. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;5. School of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China;1. College of Forestry, Henan Agricultural University, Zhengzhou, 450002, China;2. Environmental Corrosion Centre of Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China;3. Electric Power Test and Research Institute, Guangzhou Power Supply Co. Ltd. (GZPS), Guangzhou, 510410, China;4. School of Metallurgy, Northeastern University, Shenyang, 110819, China |
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| Abstract: | The microstructure evolution and intergranular corrosion (IGC) behavior of high nitrogen martensitic stainless steels (MSSs) by partial replacing C by N were investigated by using microscopy, X-ray diffraction, nitric acid tests and double-loop electrochemical potentiokinetic reactivation (DL-EPR) tests. The results show that the partial replacement of C by N first reduces and then increases the size and content of precipitates in high nitrogen MSSs, and converts the dominant precipitates from M23C6 to M2N, furthermore first improves and then deteriorates the IGC resistance. The high nitrogen MSS containing medium C and N contents provides good combination of mechanical properties and IGC resistance. |
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| Keywords: | High nitrogen martensitic stainless steels Precipitation Intergranular corrosion DL-EPR |
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