Influence of Al-Si additions on mechanical properties and corrosion resistance of Mg-8Li dual-phase alloys |
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| Authors: | Zi-long Zhao Xue-gang Xing Yi Luo Yi-de Wang Wei Liang |
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| Affiliation: | 1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan 030024, Shanxi, China;2. Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;3. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China |
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| Abstract: | Sheet samples of Mg-8Li, Mg-8Li-3Al, Mg-8Li-3AlSi and Mg-8Li-5AlSi alloys were obtained by hot roll-ing.Optical microscope, microhardness tester, nanoindentor, X-ray diffractometer and electrochemical analyzer were adopted to investigate the microstructures, micro-mechanical properties and corrosion re-sistance.Roller was preheated to 150°C before rolling process, and rolling reduction designed was about 20% per pass with a total rolling reduction of 84%.The rolled plates were annealed at 200°C for 120 min. The tensile tests were performed at room temperature.Experimental results showed that both the strength and corrosion resistance of theα+βdual-phase of Mg-Li alloy were significantly improved with adding Al-Si elements.The strength enhancement was attributed to the solid solution of Al into theα-Mg matrix and into theβ-Li matrix as well as to the precipitation strengthening of Mg2 Si particles.Besides, the dendrite grains ofα-Mg transformed to equiaxed ones with addition of Al into alloy Mg-Li. |
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| Keywords: | Mg-8Li dual-phase alloy Mechanical property Corrosion resistance Hardness Rolling |
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