کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
831228 1470365 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of thermal treatment on precipitate shape and mechanical properties of Mg–8Gd–4Y–Nd–Zr alloy
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Effects of thermal treatment on precipitate shape and mechanical properties of Mg–8Gd–4Y–Nd–Zr alloy
چکیده انگلیسی

Precipitation reactions in a Mg–8Gd–4Y–Nd–Zr alloy have been investigated using TEM, HREM, hardness measurements and tensile testing. Globular β′ precipitates, which were different from the typical plate-shaped β′ precipitates usually observed in Mg–Gd-based alloys, were detected in the 160 °C/192 h-aged sample. Instead of dissolution and then precipitating as plate-shaped β′ precipitates, the formed globular β′ precipitates grew up when further aged at 215 °C, which resulted in the decrease in strength comparing with that of the 215 °C single-stage aged samples. Two-stage ageing treatments on the alloy demonstrated that ageing 192 h at 150 °C plus 16 h at 215 °C made the ultimate strength and the yield strength improved 17 MPa and 13 MPa, respectively.


► We observed the globular β′ precipitates in Mg–8Gd–4Y–Nd–Zr alloy.
► We investigated the effect of globular precipitates on mechanical properties of Mg–8Gd–4Y–Nd–Zr alloy.
► Pre-aged at 150 °C can improve the strength of the alloy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design - Volume 32, Issue 10, December 2011, Pages 4994–4998
نویسندگان
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