Warm negative incremental forming of magnesium alloy AZ31 Sheet: New lubricating method |
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| Authors: | Qinglai Zhang Fugui Xiao Hailing Guo Changsheng Li Lin Gao Xingwu Guo Weidong Han AB Bondarev |
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| Affiliation: | 1. School of Materials Science and Engineering, Jiangsu University, 301 Xue Fu Street, Zhenjiang 212013, PR China;2. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, PR China;3. School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China;4. Bao Ji Boxin Metal Materials Co. Ltd., Baoji 721013, PR China;5. Industrial Center MATEKS Ltd., Moscow 121596, Russia;1. School of Mechanical Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK;2. Department of Mechanical Engineering, University of Aveiro, Campus de Santiago, 3810-183 Aveiro, Portugal;3. Department of Industrial and Digital Innovation, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy;4. Department of Industrial Machinery and Equipment, Lucian Blaga University of Sibiu, 10 Victoriei Bd, Sibiu 550024, Romania;1. University of Calabria, Department of Mechanical, Energy and Management Engineering, Italy;2. University of Padua, Department of Industrial Engineering, Italy;1. Department of Plasticity Technology, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai, 200030, China;2. Department of Mechanical Engineering, University of Sheffield, Western Bank, Sheffield S10 2TN, UK;3. Department of Mechanical Engineering, Northwestern Univsersity, Evanston, IL 60208-3111, USA;1. School of Automation, Xi’an University of Posts & Telecommunications, Xi’an 710121, PR China;2. MOE Key Laboratory of the Thermo-Fluid Science & Engineering, Xi’an Jiaotong University, Xi’an 710049, PR China |
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| Abstract: | The present study has been undertaken in order to investigate the suitable lubricants and lubricating methods, which can be employed to form a magnesium alloy AZ31 sheet by warm negative incremental forming (NIF). For the intended purpose, Nano-K2Ti4O9 whisker and organic binder were employed to improve the bonding strength at lubrication coating/sheet interface and lubricating properties at elevated temperatures. The Nano-K2Ti4O9 whisker enhanced solid lubrication film and the solid graphite or MoS2 powder-coated porous ceramic coatings by pulsed anodic oxidation (PAO) almost have the same coefficient of the initial friction about 0.07–0.1 at room and elevated temperatures, which was satisfied with friction and lubrication condition of warm incremental forming (IF) of the metal sheet. Solid graphite or MoS2 powder-coated ceramic coatings possessed the remarkable lubrication and self-lubrication effect. These suggested lubricating methods gave an excellent solid lubrication performance and good surface quality of the formed parts in warm IF process of the metal sheet. |
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