کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5459388 1516168 2017 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of solute concentration on the stacking fault energy in copper alloys at finite temperatures
ترجمه فارسی عنوان
اثر غلظت محلول بر روی انرژی خطای انباشته در آلیاژهای مس در دماهای کم
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی
Stacking-fault energy (SFE) is a critical parameter that influences plastic deformation of Cu alloys. Here, the SFEs of Cu solid solutions at various temperatures and solute concentrations were studied by using first-principles calculations. The interaction energies of 18 substitutional atoms and 5 interstitial atoms with stacking fault (SF) in Cu were obtained for the first time. The results show that the interactions can extend to the second layer with respect to the SF. Substitutional atoms Sn, Al, Zn, P, Si, Ge as well as interstitial atoms Be, C, N, O, H have large attraction energies with the SF; whereas, substitutional atoms Ti, Mn, Cr are repelled by the SF, and the rest of the atoms have small interaction energies. Then, the effects of uniform and Fermi-Dirac distribution of solute atoms on the SFE of Cu alloys were further investigated based on these interaction energies. It is found that the SFE of Cu can be drastically reduced by Sn, Al, Zn, P, Si, Ge, C, N and O atoms with relatively high concentration at low temperatures. Our research suggests that it is possible to obtain twins in bulk Cu by adding alloying elements at circumstances, since the SFEs can be significantly lowered.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 726, 5 December 2017, Pages 601-607
نویسندگان
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