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《Chinese Journal of Materials Research》 2012-02
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Effects of Y on Elevated Temperature Mechanical Properties of Mg-8Al-2Sr Alloy

FAN Jinping~(1,2,3) XU Bingshe~(1,2,3**) WANG Shebin~(1,2,3) LIU Lu~3 1.Key laboratory of interface science and engineering in advanced materials,ministry of education,Taiyuan 030024 2.Shanxi research center of advanced materials science and technology,Taiyuan 030024 3.Taiyuan university of technology,college of material science and technology,Taiyuan 030024  
The effects of Y on mechanical properties of Mg-8AI-2Sr-xY alloys at elevated-temperature were investigated by optical microscopy(OM),scanning electron microscopy(SEM) and energy dispersive spectroscopy(EDS),high resolution transmission electron microscopy(HRTEM),X-ray diffraction(XRD) and tensile testing.Results show that adequate Y addition can refine the grains of Mg- 8AI-2Sr alloy distinctly,change phase composing,restraineβ-Mg_(17)Al_(12) effectively and heat-resistant Al_2Y and Al_2Sr came forth as a result and improve the elevated temperature mechanical properties.But superabundant Y addition results in uneven microstructure and composition and the decrease of the mechanical properties.
【Fund】: 国家自然基金2010jc13;; 山西省归国留学人员科学研究基金2008-39资助项目~~
【CateGory Index】: TG146.22
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