铸造2026，Vol.75Issue(8)：835-840,6.DOI:10.27014/j.cnki.zhuzao.2026.0107
微量稀土Y对AlCrMo0.5NbV体系难熔高熵合金组织和性能的影响
The Influence of Trace Rare Earth Y on the Microstructure and Properties of Refractory High-Entropy Alloy AlCrMo0.5NbV System
摘要
Abstract
A series of refractory high-entropy alloys(AlCrNbMo0.5V)100-xYx containing trace rare earth Y were prepared via vacuum arc melting,and the effects of Y on the microstructure and properties of(AlCrNbMo0.5V)100-xYx alloys were systematically investigated.The results show that all of the alloys have a single body-centered cubic(BCC)structure,and the variation of Y content does not affect the phase composition of the(AlCrNbMo0.5V)100-xYx alloys.When the Y content is relatively low(≤0.3at.%),each element distributes uniformly;when the Y content increases to 0.45at.%,the element Y generates segregation and precipitation because it exceeds the solid solubility limit of the alloy.The high-temperature compression test under 1 273 K shows that when the Y content is 0.15at.%,the yield strength and peak strength of the alloy reach the maximum values(632 MPa,716 MPa),which are 30.4%and 10.8%higher than those of the alloy without Y,respectively,however,the fracture strain decreases from>50%to 45.8%.Analysis shows that an appropriate amount of Y enhances the strength through solid solution strengthening caused by lattice distortion,but it inhibits the dislocation slip,resulting in the plasticity decrease;excessive Y content will lead to segregation of Y and form brittle phases,weakening the strengthening effect and resulting in the plasticity decrease.关键词
难熔高熵合金/AlCrMoNbV/稀土元素Y/微观组织/压缩性能/真空电弧熔炼Key words
refractory high-entropy alloy/AlCrMoNbV/rare earth element Y/microstructure/compressive properties/vacuum arc melting分类
矿业与冶金引用本文复制引用
汪天天,蒋文韬,姜博,王晔,朱冬冬,许红雨,胡茂良..微量稀土Y对AlCrMo0.5NbV体系难熔高熵合金组织和性能的影响[J].铸造,2026,75(8):835-840,6.基金项目
国家自然科学基金资助项目(52071188). （52071188）
