UM
Effect of strontium on the microstructure and mechanical properties of AZ31 magnesium alloy
Wang Y.2; Zeng X.2; Ding W.2; Luo A.A.1; Sachdev A.K.1
2005-09-26
Source PublicationMagnesium Technology
Pages85-90
AbstractThe effect of strontium on the microstructure and mechanical properties of AZ31 magnesium alloy, and its sensitivity to casting section thickness are investigated. Three phases, block-shaped MgAl, acicular MgAlMnSr and insular Mg (Al,Zn)Sr, are identified in the Sr-containing AZ31 alloys. Although decreasing casting thickness decreases the grain size due to an increase in cooling rate, the Sr addition provides a greater effect for additions less than 0.5%. Higher levels of Sr lead to the formation of the Mg(Al,Zn)Sr phase which consumes the Sr and precludes its effect on refining the grain size. The mechanical properties of as-cast AZ31 magnesium alloy are improved by the Sr grain refinement, although the elongation decreases with the formation of the Mg(Al,Zn) Sr phase. An optimum Sr addition between 0.01 and 0.1% is recommended.
KeywordAZ31 Grain refinement Magnesium alloy Mechanical properties Microstructure
URLView the original
Language英語
Fulltext Access
Document TypeConference paper
CollectionUniversity of Macau
Affiliation1.General Motors
2.Shanghai Jiao Tong University
Recommended Citation
GB/T 7714
Wang Y.,Zeng X.,Ding W.,et al. Effect of strontium on the microstructure and mechanical properties of AZ31 magnesium alloy[C],2005:85-90.
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