کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1562097 999579 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The energetic and structural properties of bcc NiCu, FeCu alloys: A first-principles study
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
The energetic and structural properties of bcc NiCu, FeCu alloys: A first-principles study
چکیده انگلیسی

Using special quasirandom structures (SQS’s), we perform first-principles calculations studying the metastable bcc NiCu and FeCu alloys which occur in Fe–Cu–Ni alloy steels as precipitated second phase. The mixing enthalpies, density of states, and equilibrium lattice parameters of these alloys are reported. The results show that quasi-chemical approach and vegard rule can satisfactorily predict the energetic and structural properties of FeCu alloys but fail to accurately yield that of NiCu. The reason rests with the difference of bond energy variation with composition between NiCu and FeCu alloys induced by competition between ferromagnetic and paramagnetic state. Furthermore, the results show that the energetic and structural properties of these alloys can explain the element distribution of the Cu-rich precipitates in ferrite steels.


► Construct 32-atom SQS’s for bcc AxB1−x (x = 0.25, 0.5, 0.75) alloys.
► The energetic and structural properties of bcc NiCu and FeCu are reported.
► The electronic structure is presented to understand these properties.
► To explain element distribution of Cu-rich precipitates in ferritic steels.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 50, Issue 9, July 2011, Pages 2586–2591
نویسندگان
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