کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10655772 1005243 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural stability of NiAl with the L10 structure and local lattice distortion in the Ni3Al alloy around excess Al atoms
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Structural stability of NiAl with the L10 structure and local lattice distortion in the Ni3Al alloy around excess Al atoms
چکیده انگلیسی
For explaining asymmetry in the flow stress of Ni3Al alloy as a function of aluminum content, the structural energy of ordered NiAl alloy with the L10 structure is obtained with the electronic structure calculations based on the density functional theory. Quite a large distortion in the c-direction is found at the equilibrium, which means an L10-like local structure appearing in the Al-rich region of the Ni3Al phase undergoes a large tetragonal strain. This tetragonal strain will give an explanation for the strengthening mechanism using the framework of Cochardt et al. The effect of the Al concentration on the structural stability of L10 in terms of the DOS is also discussed to explain the concentration dependence of the B2-L10 martensitic transition temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 13, Issue 11, November 2005, Pages 1137-1140
نویسندگان
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