کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7988397 | 1515818 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructures and thermodynamic properties of high-entropy alloys CoCrCuFeNi
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The high entropy alloys (HEAs) is a kind of innovative alloy design conception. However, seldom quantitative thermodynamics descriptions were reported in the past. In this paper, as a demonstration, the microstructures and thermodynamic properties of CoCrCuFeNi HEA were studied by combining experimental approaches with computational simulations. The CoCrCuFeNi alloy shows duplex FCC structure with Cu-lean and Cu-rich phase. With the increase of heat treatment temperature from 773 K to 1273 K, the predicted total configurational entropy changes from 6.13 to 7.83 J·molâ1·Kâ1, which is far less than the common-believed Boltzmann's hypothesis value (13.38 J·molâ1·Kâ1) due to the ordering behavior of element occupying on the sublattices. Cu atoms tend to enrich in liquid phase, which segregates as interdendritic microstructure during solidification process. The experimental results are highly consistent with the calculated results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 93, February 2018, Pages 40-46
Journal: Intermetallics - Volume 93, February 2018, Pages 40-46
نویسندگان
Bo Wu, Zheyu Xie, Jinchang Huang, Jinwei Lin, Yixu Yang, Linqiao Jiang, Jianglin Huang, Guoxin Ye, Chunfeng Zhao, Shangjin Yang, Baisheng Sa,