کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5455021 | 1514366 | 2016 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural and compositional evolution of Al3(Zr,Y) precipitates in Al-Zr-Y alloy
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Structural and compositional evolution of Al3(Zr,Y) precipitates in Al-Zr-Y alloy Structural and compositional evolution of Al3(Zr,Y) precipitates in Al-Zr-Y alloy](/preview/png/5455021.png)
چکیده انگلیسی
Structural and compositional evolution of Al3(Zr,Y) precipitates in aged Al-Zr-Y alloy was investigated through atom probe tomography (APT) and transmission electron microscope (TEM) analysis and first principles calculations. The results show that short-bar-shaped D019-Al3Y with some Zr atoms dissolved in precipitated at the very beginning of decomposition and worked as heterogeneous nuclei for L12-Al3Zr with spherical morphology after being aged at 400 °C for 2 h. Quasi-static coarsening happened as the aging treatment lasted from 2 h to 200 h. However, distribution of Zr and Y atoms in Al3(Zr,Y) is nearly uniform and Al3(Zr,Y) do not have the typical “Al3RE core-Al3Zr shell” structure which observed in other RE containing Al-Zr-RE alloys with L12-Al3RE as nuclei. First principles calculations revealed that binding energy between Y and Zr is strong during the growth of Al3(Zr,Y), which led to the co-precipitation of Y and Zr atoms and attribute to the evolution of Al3(Zr,Y).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 121, November 2016, Pages 195-198
Journal: Materials Characterization - Volume 121, November 2016, Pages 195-198
نویسندگان
Haiyan Gao, Wuqiang Feng, Yufei Wang, Jing Gu, Yongzhi Zhang, Jun Wang, Baode Sun,