arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1508.00935cond-mat.mtrl-sci
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原子尺寸和价电子浓度对高熵合金fcc或bcc固溶体形成的影响

Effect of Atomic Size and Valence Electron Concentration on the Formation of fcc or bcc Solid Solid Solutions in High Entropy Alloys

Oscar Coreno Alonso, Juan Coreno Alonso

摘要:

采用先前报道的规则,计算了高熵合金(HEAs)中四到七种元素的合金形成固溶体的可能性。包括30种元素:周期表第四、第五和第六周期的过渡元素和铝。共分析了2,799,486个系统。当元素的数量从四个增加到七个时,在HEAs中形成的固溶体的百分比从35.9%下降到26.4%。已经使用先前报道的观察结果预测了将形成的固溶体的结构,fcc,bcc或fcc和bcc的混合物。随着元素数目从4增加到7,具有fcc或bcc结构的系统的百分比降低。计算了具有fcc、bcc或fcc和bcc的混合物的固溶体的百分比,对于具有4至7个元素但保持一个恒定元素的合金。其中恒定元素具有价电子浓度的系统,VEC,从3到4,将在大约50%的系统中具有bcc结构。当系统中的常量元素具有10到12个VEC时,大约75%的系统将呈现fcc结构。

英文摘要:

The possibility of solid solution formation in high entropy alloys (HEAs) has been calculated for alloys with four to seven elements, using a rule previously reported. Thirty elements were included: transition elements of the fourth, fifth and sixth periods of the periodic table, and aluminum. A total of 2,799,486 systems were analyzed. The percentage of solid solutions that would be formed in HEAs decreases from 35.9% to 26.4%, as the number of elements increases from four to seven. The structure of the solid solutions, fcc, bcc or a mixture of fcc and bcc, that would be formed, has been predicted using a previously reported observation. The percentage of systems with fcc or bcc structure decreases as the number of elements increases from four to seven. The percentages of solid solutions with fcc, bcc or a mixture of fcc and bcc were calculated, for alloys with four to seven elements, but maintaining one constant element. Systems in which the constant element has valence electron concentration, VEC, from three to four, would have bcc structure in around 50% of the systems. Systems in which the constant element has VEC from ten to twelve, around 75% of systems would present fcc structure.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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