کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10621115 | 988775 | 2005 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Heterophase fluctuations of incommensurate omega phase in Cu-Zn system
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Heterophase fluctuations of incommensurate omega phase in Cu-Zn system Heterophase fluctuations of incommensurate omega phase in Cu-Zn system](/preview/png/10621115.png)
چکیده انگلیسی
A heterophase fluctuation of omega (Ï) phase in the body-centered cubic matrix is studied by evaluating the reciprocal free energy modulus which includes the properties of coherent strain energy and the bulk free energy change. As a consequence, analytical expressions are obtained for the concentration, dimensions and distribution of heterophase Ï clusters. The incommensurate Ï cluster having a dual phase (Ï and β) structure is suggested to form in the heterophase fluctuation. On the basis of the theoretical analysis of the distribution of Ï clusters, quantitative calculation of diffuse intensity of X-ray diffraction was carried out for the Cu-Zn system. The estimated diffuse intensities I(h)/I0 are in good agreement with the experimental results: the offset of the diffuse intensity peak and ellipsoidal shape of the intensity having streaks towards the nearest fundamental spot. The diffuse peak of X-ray diffraction is manifested to behave like a central phonon peak of heterophase fluctuation as T/(T â T0) where T0 is the coherent transformation temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 53, Issue 6, April 2005, Pages 1693-1709
Journal: Acta Materialia - Volume 53, Issue 6, April 2005, Pages 1693-1709
نویسندگان
Susan Farjami, Hiroshi Kubo,