کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1611491 1516294 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Role of Yb and Si on the precipitation hardening and recrystallization of dilute Al-Zr alloys
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Role of Yb and Si on the precipitation hardening and recrystallization of dilute Al-Zr alloys
چکیده انگلیسی
The effect of Yb and Si on precipitation hardening and recrystallization of Al-Zr alloys have been investigated. The results show that Yb is more effective than Si to accelerate the precipitation kinetics and stimulate the precipitation of Al-Zr alloy. The peak hardness values for the Al-Yb-Si-0.08Zr are 510 MPa and 515 MPa after isochronal aging to 425 °C and isothermal at 350 °C for 200 h, respectively, which are significantly larger than that of the Al-Yb-Zr and Al-Si-Zr alloys. The precipitates in alloys with addition of Zr are more thermally stable than that of the Al-Yb alloy. The recrystallization temperatures of Al-Zr, Al-Si-Zr, Al-Yb-Zr and Al-Yb-Si-Zr alloys are 250, 400, 425 and 450 °C, respectively, increase with the increase of the corresponding peak aging hardness. The recrystallization temperature of Al-Yb alloy is 325 °C, which is much lower than that of the Al-Yb-Zr alloy due to the coarsening of the Al3Yb at temperature larger than 300 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 599, 25 June 2014, Pages 65-70
نویسندگان
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