کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1580250 | 1514834 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Constitutive equations in creep of wrought Mg-Zn alloys
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The creep behaviour between 100 and 150 °C of Mg-Zn-RE wrought extruded alloys was investigated in the present study by taking into account both solid solution and particle-strengthening mechanisms. Constitutive equations correlating minimum creep rate, applied stress and temperature were thus preliminarily derived for dilute Mg-Zn solid solutions; the role of secondary phase particles, that form when the solubility limit of the alloying elements is exceeded, was then expressed by introducing a threshold stress representing particle-dislocation interaction. The model was applied to both the ZEK200 and to a reference commercial alloy ZM21; in both cases the description of experimental data was excellent, and the variation of threshold stress with temperature was found to agree with the available information on the thermal stability of the different families of precipitates, i.e. Mg-Zn and Mg-RE particles in ZM21 and ZEK200 respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 527, Issues 1â2, 15 December 2009, Pages 126-131
Journal: Materials Science and Engineering: A - Volume 527, Issues 1â2, 15 December 2009, Pages 126-131
نویسندگان
Stefano Spigarelli, Mohamad El Mehtedi,