Microstructure and mechanical properties of AM31 magnesium alloys processed by differential speed rolling |
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Authors: | LL Chang JH ChoSB Kang |
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Affiliation: | a Korea Institute of Materials Science, 66 Sangnam-dong, Changwon 641010, Republic of Korea b School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China |
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Abstract: | Ingot casted AM31 alloys were rolled at a warm temperature of 350 °C and subsequently rolled at 300 °C using equal speed rolling (ESR) and differential speed rolling (DSR) with speed ratios of top roll to bottom roll, 1.2 and 1.5, respectively. Microstructures, textures and mechanical properties of the as-rolled AM31 sheets were examined. Ductility was improved by DSR due to inclination of basal poles and weakened texture. The sheets produced by DSR with a speed ratio of 1.2 showed highest strength and ductility at room temperature, which can be attributed to homogeneous fine grain distribution and tilted basal texture. |
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Keywords: | Differential speed rolling Magnesium alloy Texture Microstructures Plasticity |
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