...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Materials >Ultrastrong Medium-Entropy Single-Phase Alloys Designed via Severe Lattice Distortion
【24h】

Ultrastrong Medium-Entropy Single-Phase Alloys Designed via Severe Lattice Distortion

机译：通过严重晶格畸变设计的超强中熵单相合金

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

Severe lattice distortion is a core effect in the design of multiprincipal element alloys with the aim to enhance yield strength, a key indicator in structural engineering. Yet, the yield strength values of medium- and high-entropy alloys investigated so far do not substantially exceed those of conventional alloys owing to the insufficient utilization of lattice distortion. Here it is shown that a simple VCoNi equiatomic medium-entropy alloy exhibits a near 1 GPa yield strength and good ductility, outperforming conventional solid-solution alloys. It is demonstrated that a wide fluctuation of the atomic bond distances in such alloys, i.e., severe lattice distortion, improves both yield stress and its sensitivity to grain size. In addition, the dislocation-mediated plasticity effectively enhances the strength-ductility relationship by generating nanosized dislocation substructures due to massive pinning. The results demonstrate that severe lattice distortion is a key property for identifying extra-strong materials for structural engineering applications.
机译：严重的晶格畸变是多原则元素合金设计中的核心作用，旨在增强屈服强度，这是结构工程中的关键指标。然而，由于对晶格畸变的利用不充分，到目前为止研究的中熵和高熵合金的屈服强度值基本上没有超过常规合金的屈服强度值。此处显示了一种简单的VCoNi等原子中熵合金，表现出接近1 GPa的屈服强度和良好的延展性，优于传统的固溶合金。证明了这种合金中原子键距的宽幅波动，即严重的晶格畸变，既改善了屈服应力，又改善了其对晶粒尺寸的敏感性。另外，位错介导的可塑性通过大量钉扎产生纳米级位错亚结构，从而有效地增强了强度-延性关系。结果表明，严重的晶格畸变是确定用于结构工程应用的超强材料的关键特性。

著录项

  • 来源
    《Advanced Materials》 |2019年第8期|1807142.1-1807142.8|共8页
  • 作者

    Sohn Seok Su; da Silva Alisson Kwiatkowski; Ikeda Yuji; Koermann Fritz; Lu Wenjun; Choi Won Seok; Gault Baptiste; Ponge Dirk; Neugebauer Joerg; Raabe Dierk;

  • 作者单位

    Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany;

    Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany;

    Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany|Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan;

    Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany|Delft Univ Technol, Dept Mat Sci & Engn, Mekelweg 2, NL-2628 CD Delft, Netherlands;

    Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany;

    Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Daejeon 34141, South Korea;

    Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany;

    Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany;

    Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany;

    Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ab initio calculation; atomic bond distances; lattice distortion; medium-entropy alloys; tensile properties;

    机译：从头算;原子键距;晶格畸变;中熵合金;拉伸性能;

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