Refinement Role of Electromagnetic Stirring and Calcium in AZ91 Magnesium Alloy

Refinement Role of Electromagnetic Stirring and Calcium in AZ91 Magnesium Alloy

Effects of calcium addition and electromagnetic stirring on the microstructure of AZ91 magnesium alloy and refinement mechanism were investigated. The results show that calcium addition ranging from 0.1wt% to 0.3 wt% does not lead to formation of any new phases but cause the refinement of ascast mic...

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Veröffentlicht in:Journal of Wuhan University of Technology. Materials science edition 2008-04, Vol.23 (2), p.194-197
Hauptverfasser: Han, Hui, Liu, Shengfa, Kang, Liugen, Liu, Linyan
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Sprache:eng
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Alloys
AZ91镁合金
Chemistry and Materials Science
Materials Science
Metallurgy
微观结构
电磁活性
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container_title Journal of Wuhan University of Technology. Materials science edition
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creator Han, Hui
Liu, Shengfa
Kang, Liugen
Liu, Linyan
description Effects of calcium addition and electromagnetic stirring on the microstructure of AZ91 magnesium alloy and refinement mechanism were investigated. The results show that calcium addition ranging from 0.1wt% to 0.3 wt% does not lead to formation of any new phases but cause the refinement of ascast microstructure.However, combined calcium alloying and electromagnetic stirring significantly decrease the grain size, change the morphologies of the β-Mg17Al12 phases,and reduce their volume percentage. The minimum grain size of AZ91 alloy is obtained in the case of the addition of 0.2 wt%Ca with exciting voltage of 100 V. The microstructural refinement is attributed to the increase of the degree of undercooling and nucleation temperature of primary α-Mg phases on the basis of DTA analysis results.
doi_str_mv 10.1007/s11595-006-2194-3
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source SpringerNature Journals; Alma/SFX Local Collection
subjects Alloys
AZ91镁合金
Chemistry and Materials Science
Materials Science
Metallurgy
微观结构
电磁活性
title Refinement Role of Electromagnetic Stirring and Calcium in AZ91 Magnesium Alloy
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