کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1449208 988694 2008 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Lattice study of ω phase formation involving volume change
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Lattice study of ω phase formation involving volume change
چکیده انگلیسی

The incommensurate structure of the ω phase, which has been observed as the pre-transition phenomena of ω phase transformation, was studied by focusing on the elastic strain energy in a domain model using the microscopic theory of elasticity. The convolution theorem was applied to simplify the mathematics of describing an incommensurate ellipsoidal droplet with an internal structure consisting of alternate lamellae of ω and β phases. It was clear that the decomposition into the two-phase structure yielded much less elastic strain energy than the single ω phase. The interface of the ω and β lamellae in the incommensurate structure should be (1 1 1)β when formed by the simple ω wave k(qω) of Burgers displacement, but the deviation of the interface orientation from the (1 1 1)β plane occurs due to the additional volume change by Bain distortion. It was also found that there is no interaction in the elastic strain energy originated by the Burgers displacement and the Bain distortion.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 56, Issue 2, January 2008, Pages 299–311
نویسندگان
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