Effects of Strontium Addition on Microstructure and Properties of AE42 Magnesium Alloy

Yong Jiang; Wei Dong Xie; Xiao Dong Peng; Qun Yi Wei; Yan Bing Feng; Shou Cheng Wang

doi:10.4028/www.scientific.net/MSF.610-613.771

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HomeMaterials Science ForumMaterials Science Forum Vols. 610-613Effects of Strontium Addition on Microstructure...

Effects of Strontium Addition on Microstructure and Properties of AE42 Magnesium Alloy

Abstract:

The samples with different strontium contents of AE42 magnesium alloy were prepared. The metalloscope and electronic microscope and XRD were used to characterize the microstructure and composition of the samples. The elevated temperature mechanical properties of the samples were tested and the strontium phases in the AE42 and their influence to the mechanical properties analyzed. The results showed that the main strontium phase in the AE42 was Al4Sr. Al4Sr pinned the crystal boundary of magnesium matrix and hindered dislocation climbing and sliding through the crystal boundary effectively. As a result, the crystal axial range was reduced and the crystal grain refined, and hence the creep resistance increased.