Effect of grain size on the tensile deformation of wrought Mg-MM-Al-Zn-Sn alloy |
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| Authors: | Hyun Kyu Lim |
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| Affiliation: | a Center for Noncrystalline Materials/Department of Metallurgical Eng. Yonsei University, Seoul, South Korea
b Applied Science Division, Cheongju University, Cheongju, Chongbuk, South Korea |
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| Abstract: | The effect of grain size on the tensile deformation of Mg-MM-Al-Zn-Sn (EAZT211) alloy sheet has been investigated. Specimens with grain size varying from ~ 10 to ~ 20 μm have been obtained by altering the annealing conditions after rolling. The yield strength of EAZT211 sheet exhibits grain size dependence according to Hall-Petch relationship from room temperature to 200 °C. Occurrence of yield phenomenon and decrease of Hall-Petch slope (k) with increasing strain suggest that non-basal slip system operates during deformation. In addition, deformation mechanism changes from slip mechanism to grain boundary sliding mechanism at ~ 150 °C. |
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| Keywords: | Wrought magnesium alloy Tensile deformation Hall-Petch relationship Grain boundary sliding |
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