کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5455903 | 1514652 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Precipitation in an Al-Zn-Mg-Cu alloy during isothermal aging: Atomic-scale HAADF-STEM investigation
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The present study, using advanced Cs-corrected high-angle annular dark field - scanning transmission electron microscopy (HAADF-STEM), reports on a comprehensive investigation into the precipitate structures in an Al-Zn-Mg-Cu alloy aged at 150 â, including GP zones, η' and η precipitates. In the nucleation stage, Zn atoms enrich on the {111}Al-planes abutting spherical Mg clusters that are approximately 3-6 nm in diameter. In the subsequent growth, the as-nucleated structures extend with an increasing diameter and a constant width along [111]Al and grow into platelet precipitates. η' is proved to be a group of metastable structures existing in the transition from FCC Al to HCP MgZn2 (η). Some metastable structures are assembled by local-ordered rhombohedral units and orthorhombic units as building blocks. Subsequently, the precipitates evolve into η phases with stacking faults.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 691, 13 April 2017, Pages 60-70
Journal: Materials Science and Engineering: A - Volume 691, 13 April 2017, Pages 60-70
نویسندگان
Xuesong Xu, Jingxu Zheng, Zhi Li, Ruichun Luo, Bin Chen,