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《Special Casting & Nonferrous Alloys》 2018-09
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Effects of Yttrium Content and Temperature on Mechanical Anisotropy of Mg-Y Magnesium Alloys

Zhang Shichang;Zhang Jian;Tian Shuang;Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education;School of Materials and Metallurgy,Wuhan University of Science and Technology;  
The wrought Mg-Y magnesium alloys with varied yttrium content were fabricated by permanent mold casting and plain compressing.The effects of yttrium content and temperature on mechanical anisotropy of Mg-Y alloys were investigated.The results reveal that the alloy containing Y presents the apparent mechanical anisotropy with compressed along radial(TD)and axial(ED)of cylinder samples of Mg-Y alloys.However,the anisotropy is decreased with increasing in yttrium content and temperature.At room temperature,the difference of strength between TD and ED directions is decreased from 82 MPa to 34 MPa when yttrium content is increased from zero to 3.02%.At 300℃,the two curves of the stress-strain diagram compressed along TD and ED direction almost completely coincide,showing the disappearance of mechanical anisotropy.The decrease of the mechanical anisotropy is attributed to the weakened{0002}basal texture and the activation of non-basal slips with increasing in yttrium and temperature.
【Fund】: 武汉科技大学国防预研基金资助项目(2018)
【CateGory Index】: TG146.22
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