...
首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Titanium alloying enhancement of mechanical properties of NbTaMoW refractory high-Entropy alloy: First-principles and experiments perspective
【24h】

Titanium alloying enhancement of mechanical properties of NbTaMoW refractory high-Entropy alloy: First-principles and experiments perspective

机译:钛合金加强了NBTAMOW耐火材料高熵合金的力学性能:第一原理和实验透视

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

Poor ductility of Refractory high entropy alloys (RHEAs) at room temperature (RT) is the main problem restricting their practical applications. Alloying is an effective method to improve the mechanical properties of RHEAs. Here, Ti was employed to enhance the RT ductility of NbTaMoW RHEAs by means of alloying. The influence of Ti addition on the mechanical properties of the equiatomic NbTaMoW RHEA was investigated from the perspective of first-principles calculation combining experiments. The phase structure, lattice parameters, densities, elastic properties and electronic structure were calculated, respectively. The results show that NbMoTaW and NbMoTaWTi alloy were single-phase BCC structure. Both alloys were electrically conductive and shown metallic characteristic. Ti alloying effectively enhanced the atomic interaction, strength and ductility of NbMoTaW alloy due to the increasing Ti-Ti metallic bonds and decreasing covalent bonds. The calculated data were well agreed with the experimental results, demonstrating that first-principles calculation was an effective method to predict the alloying performance enhancement of RHEAs. (C) 2020 Elsevier B.V. All rights reserved.
机译:难熔高熵合金室温塑性差是制约其实际应用的主要问题。合金化是改善RHEAs力学性能的有效方法。在这里,Ti被用来通过合金化提高NbTaMoW RHEAs的RT延展性。从第一性原理计算和实验相结合的角度,研究了Ti添加量对等原子NbTaMoW RHEA力学性能的影响。分别计算了其相结构、晶格参数、密度、弹性性质和电子结构。结果表明,NbMoTaW和NbMoTaWTi合金为单相BCC结构。这两种合金都具有导电性,并显示出金属特性。由于钛-钛金属键的增加和共价键的减少,钛合金化有效地增强了NbMoTaW合金的原子相互作用、强度和延展性。计算结果与实验结果吻合良好,表明第一性原理计算是预测RHEAs合金化性能提高的有效方法。(C) 2020爱思唯尔B.V.版权所有。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号