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Fe/Mg/Fe Multilayer Composite Sheet Fabricated by Roll Cladding |
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| Authors: | Daxin Ren Yanhua Ma Rencheng Zheng |
| Institution: | 1.School of Automotive Engineering, Dalian University of Technology, Dalian 116024, China;2.Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, Tianjin 300072, China;3.School of Microelectronics, Dalian University of Technology, Dalian 116024, China;4.School of Mechanical Engineering, Tianjin University, Tianjin 300072, China |
| Abstract: | A new multilayer composite sheet consisting of Fe/Mg/Fe was fabricated from galvanized steels and Mg alloy sheets via roll cladding. The clad steel improved the Mg surface hardness from HV 65 to HV 132. Bonding occurred as the reduction ratios increased up to over 10%. Investigation of the microstructure of the Mg/steel interface revealed a 5 μm- to 10 μm-thick transition layer between Mg and each steel sheet, consisting of Zn and an intermetallic compound (0.97Mg–0.03Zn). Zinc coating from the galvanized steel sheet improved the metallurgical bonding between Mg and Fe by forming new intermetallic phases. |
| Keywords: | cladding magnesium steel microstructure composites hardness |