کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7990163 1516127 2018 26 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The multiple orientation relationships and morphology of β' phase in Al-Mg-Si-Cu alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
The multiple orientation relationships and morphology of β' phase in Al-Mg-Si-Cu alloy
چکیده انگلیسی
The orientation relationships (ORs), segregation behavior and morphologies of β' precipitate in an over-aged Al-Mg-Si-Cu alloy are systematically characterized by atomic resolution high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). Six different ORs and two morphologies, i.e. rod- and lath-like are revealed for β' precipitates, and Cu segregation at the β′/α-Al interface is observed in all these precipitates. The rod-like β' precipitate has multiple β'-angles ranging from 6.1° to 14.1° and non-uniform Cu segregation at the β′/α-Al interface, while the lath-like β' precipitate has a constant β'-angle of 0° and a periodic Cu segregation. These different ORs are explained to be attributable to the rotation of QP lattice, a near-hexagonal network of Si columns formed within β' precipitates, which causes different lattice matching of β′ with α-Al lattice. These findings provide new insights in controlling the precipitation hardening and mechanical properties of this type of alloys.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 767, 30 October 2018, Pages 81-89
نویسندگان
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