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首页> 外文期刊>Journal of Materials Research >Assessing elastic property and solid-solution strengthening of binary Ni-Co, Ni-Cr, and ternary Ni-Co-Cr alloys from first-principles theory
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Assessing elastic property and solid-solution strengthening of binary Ni-Co, Ni-Cr, and ternary Ni-Co-Cr alloys from first-principles theory

机译：从第一性原理评估二元Ni-Co，Ni-Cr和三元Ni-Co-Cr合金的弹性和固溶强化

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摘要

The elastic properties and solid-solution strengthening (SSS) of the binary Ni-Co and Ni-Cr, and ternary Ni-Co-Cr alloys were investigated by the first-principles method. The results show that both Co and Cr increase lattice parameters of the binary alloys linearly. However, nonlinearity is found in compositional dependence of lattice parameters in the ternary Ni-Co-Cr alloys, that is, Co increases but decreases the lattice parameter at low and high Cr concentrations, respectively. Co increases the bulk, shear, and Young's moduli (B, G, and E), while Cr increases B but decreases G and E in the binary alloys. In the ternary Ni-Co-Cr alloys, G and E have a similar compositional dependence to those in the binary alloys, except for B. Based on the Labusch model, the SSS parameter of Ni-Cr is larger than that of Ni-Co. The SSS effect increases significantly with Cr addition, especially at low Co concentrations in the ternary Ni-Co-Cr alloys. Meanwhile, it increases mildly with Co addition at low Cr concentrations but decreases with Co addition at high Cr concentrations.
机译：采用第一性原理研究了二元Ni-Co和Ni-Cr以及三元Ni-Co-Cr合金的弹性和固溶强化（SSS）。结果表明，Co和Cr均线性增加了二元合金的晶格参数。然而，在三元Ni-Co-Cr合金中发现晶格参数的成分依赖性是非线性的，即，在低和高Cr浓度下，Co分别增加但降低了晶格参数。 Co增加了二元合金的体积模量，剪切模量和杨氏模量（B，G和E），而Cr增加了B但降低了G和E。在三元Ni-Co-Cr合金中，G和E与二元合金具有相似的成分依赖性，但B除外。基于Labusch模型，Ni-Cr的SSS参数大于Ni-Co的SSS参数。 。随Cr的添加，SSS效应显着增加，特别是在三元Ni-Co-Cr合金中的Co浓度较低时。同时，在低Cr浓度下，随着Co的添加，其温和地增加，而在高Cr浓度下，随着Co的添加而降低。

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  • 来源
    《Journal of Materials Research》 |2018年第18期|2763-2774|共12页
  • 作者

    Yang Zhi-biao; Sun Jian; Lu Song; Vitos Levente;

  • 作者单位

    Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai Key Lab Adv High Temp Mat & Precis Formi, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai Key Lab Adv High Temp Mat & Precis Formi, Shanghai 200240, Peoples R China;

    Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden;

    Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    alloy; elastic properties; simulation;

    机译：合金;弹性性能;模拟;

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