UM
Effect of strontium on the microstructure, mechanical properties, and fracture behavior of AZ31 magnesium alloy
Zeng X.2; Wang Y.2; Ding W.2; Luo A.A.1; Sachdev A.K.1
2006
Source PublicationMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
ISSN10735623
Volume37Issue:4Pages:1333-1341
AbstractThe effect of strontium (Sr) on the microstructure, mechanical properties, and fracture behavior of AZ31 magnesium alloy and its sensitivity to cooling rate are investigated. Three phases - blocky-shaped Mg Al, acicular MgA lMnSr, and insular Mg(Al, Zn)Sr - are identified in the Sr-containing AZ31 alloys. With increasing cooling rate, the blocky-shaped MgA l phase increases, the acicular MgA lMnSr phase diminishes, and the insular Mg (Al,Zn)Sr phase is refined and granulated. The study suggests that the grain size decreases with increasing cooling rate for a given composition. However, the grain size decreases first, then increases, and finally decreases again with increasing Sr for a given cooling rate. The yield strength (σ) of AZ31 magnesium alloy can be improved by grain refinement and expressed as σ = 35.88 + 279.13d according to the Hall-Petch relationship. The elongation increases when Sr is added up to 0.01 pct and then decreases with increasing Sr addition. Grain refinement changes the fracture behavior from quasicleavage failure for the original AZ31 alloy to mixed features of quasicleavage and microvoid coalescence fracture.
DOI10.1007/s11661-006-1085-8
URLView the original
Language英語
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Cited Times [WOS]:100   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.General Motors
2.Shanghai Jiao Tong University
Recommended Citation
GB/T 7714
Zeng X.,Wang Y.,Ding W.,et al. Effect of strontium on the microstructure, mechanical properties, and fracture behavior of AZ31 magnesium alloy[J]. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science,2006,37(4):1333-1341.
APA Zeng X.,Wang Y.,Ding W.,Luo A.A.,&Sachdev A.K..(2006).Effect of strontium on the microstructure, mechanical properties, and fracture behavior of AZ31 magnesium alloy.Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science,37(4),1333-1341.
MLA Zeng X.,et al."Effect of strontium on the microstructure, mechanical properties, and fracture behavior of AZ31 magnesium alloy".Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 37.4(2006):1333-1341.
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