کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1577128 1514792 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimization of the Mg-Al-Zn-Ca-Sr alloy composition based on the parameter A′ in the constitutive equation for the climb-controlled dislocation creep including the stacking fault energy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Optimization of the Mg-Al-Zn-Ca-Sr alloy composition based on the parameter A′ in the constitutive equation for the climb-controlled dislocation creep including the stacking fault energy
چکیده انگلیسی
In this study, calcium, Ca-, and strontium, Sr-added AZ91 magnesium alloys, which were composed of magnesium, Mg-9 wt.% aluminum, Al-0.8 wt.% zinc, Zn-x wt.% Ca-y wt.% Sr, were formulated and designated as AZXJ91xy alloys. The optimum composition of die-cast AZXJ alloys has been studied by micro-structural analysis and through the application of the constitutive equation of deformation behavior at elevated temperatures that includes the stacking fault energy. The normalized plots of the tensile test results of AZXJ alloys at 448 K by the constitutive equation of deformation behavior indicated that the deformation mechanism of the alloys was climb-controlled dislocation creep. The value of the constant A′ in the constitutive equation differs in the different AZXJ alloys, even though the effect of the solid solution of added elements, which is considered in the stacking fault energy term, was eliminated from A′. Using A′ as an indicator parameter of the creep resistance with the tensile strength at ambient temperature, the optimum composition of the creep-resistant Mg-Al-Zn-Ca-Sr alloy has been determined, and its creep resistance was comparable to those of known heat-resistant magnesium alloys.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 551, 15 August 2012, Pages 19-24
نویسندگان
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