کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7977657 | 1514704 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A study of precipitation strengthening and recrystallization behavior in dilute Al-Er-Hf-Zr alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A study on the precipitation hardening and recrystallization behavior of dilute Al-Er-Hf and Al-Er-Hf-Zr alloys has been carried out. The results show that both Al-0.045Er-0.18Hf and Al-0.045Er-0.08Zr-0.1Hf alloys can obtain remarkable age strengthening effect and recrystallization resistance. The precipitation hardening rate of Al-0.045Er-0.08Zr-0.1Hf is accelerated compared with that of the Al-0.045Er-0.18Hf alloy due to substituting 0.08 at% Zr for Hf, which can be ascribed to the sequential precipitation of solute elements on the basis of the disparity in their intrinsic diffusivities (DEr>DZr>DHf). The peak hardness values for the Al-0.045Er-0.08Zr-0.1Hf are 644 MPa and 662 MPa after isochronal aging to 450 °C and isothermal aging at 350 °C for 84 h, respectively, which are higher than those of the Al-0.045Er-0.18Hf alloy. The recrystallization temperature of Al-Er-Hf-Zr alloy is 450 °C, about 25 °C higher than that of the Al-Er-Hf alloy due to the larger f/r ratio of precipitates in Al-Er-Hf-Zr alloys.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 639, 15 July 2015, Pages 307-313
Journal: Materials Science and Engineering: A - Volume 639, 15 July 2015, Pages 307-313
نویسندگان
H. Wu, S.P. Wen, X.L. Wu, K.Y. Gao, H. Huang, W. Wang, Z.R. Nie,