...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Tensile properties of AlCrCoFeCuNi glassy alloys: A molecular dynamics simulation study
【24h】

Tensile properties of AlCrCoFeCuNi glassy alloys: A molecular dynamics simulation study

机译：AlCrCoFeCuNi玻璃态合金的拉伸性能：分子动力学模拟研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

High-entropy alloys (HEAs) are among multi-component alloys with attractive microstructures and mechanical properties. In this study, molecular dynamics simulation was used to determine the tensile behaviour of glassy Al_xCrCoFeCuNi HEAs from 300° K to 1300° K. For this purpose, this alloy with variations in chemical concentration of aluminum were heated and then cooled at a high cooling rate of 21. 1 × 10~(12) K/s. Results from radial distribution functions (RDF) and common neighbor analysis (CNA) indicated that no crystalline structures were formed for these glassy alloys. The deformation behaviour and mechanisms of the glassy alloys at room and high temperatures and various strain rates were investigated and reported. The tensile test results showed that the yield stress decreased markedly as temperature was increased for all the alloys. The alloys exhibited superplastic behaviour for all test conditions. More importantly, by increasing the molar ratio of aluminum from 0.5 to 3.0, the yield stress and elastic modulus decreased considerably. Also, the yield stress increased with increasing the strain rate for all samples with different aluminum concentrations. Free volume content of the alloys as well as shear banding were evaluated for these alloys to aid explanation of these results.
机译：高熵合金（HEA）是具有吸引人的微观结构和机械性能的多组分合金。在这项研究中，使用分子动力学模拟确定玻璃化的Al_xCrCoFeCuNi HEA在300°K至1300°K范围内的拉伸行为。为此，将这种铝化学浓度变化的合金加热，然后以高冷却速率冷却为21. 1×10〜（12）K / s径向分布函数（RDF）和共同邻居分析（CNA）的结果表明，这些玻璃态合金未形成晶体结构。研究并报道了玻璃态合金在室温和高温以及各种应变速率下的变形行为和机理。拉伸试验结果表明，所有合金的屈服应力均随温度升高而显着降低。合金在所有测试条件下均表现出超塑性行为。更重要的是，通过将铝的摩尔比从0.5增加到3.0，屈服应力和弹性模量大大降低。同样，对于具有不同铝浓度的所有样品，屈服应力随着应变率的增加而增加。评估了这些合金的自由体积含量以及剪切带，以帮助解释这些结果。

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