EFFECT OF YTTRIUM ADDITION ON TEXTURE DEVELOPMENT IN A CAST Mg-Al-Y MAGNESIUM ALLOY DURING COMPRESSION

摘要

Magnesium is increasingly used in the automotive and aerospaceindustries to reduce vehicle weight and fuel consumption.Alloying with rare-earth (RE) elements is considered as animportant tool for magnesium to achieve superior properties viatexture randomization. The present study was aimed to identifythe inter-relationship among the texture evolution, yttrium contentand deformation behavior in a cast Mg-Al-Y alloy incompression. A weak and random texture was present in the Ycontainingcast magnesium alloy. Increasing Y content reducedthe extent of twinning and enhanced the slip deformation mode.Despite a slight decrease in the yield strength and ultimatecompressive strength, increasing Y content by 0.3% and loweringAl content by 2% resulted in a significantly increased fracturestrain. The compression deformation led to the formation of {1 210}<0001> and {011 0}<0001> texture components.