The enhancement in intermediate-temperature tensile properties of Ni-26W-6Cr alloy by yttrium addition

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-06-02 DOI:10.1016/j.jallcom.2025.181348

Xiaoyue Li , Chenhao Yang , Yulin Wei , Xiangbin Ding , Renduo Liu , Min Liu

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Abstract

In this work, the impacts of Y contents on the microstructure and mechanical properties of Ni-26W-6Cr-xY alloys at 700 °C were systematically studied. The results indicated that the grain size showed a decreasing trend with the increase of Y content. Meanwhile, the doping of Y element induced the precipitation of Ni₅Y phases and increased the percentage of Σ3 and Σ9 type twin boundaries in the alloy. When 0.27 wt% Y was added, the yield strength (YS) rose from 80.54 MPa to 247.49 MPa. Moreover, the alloy with 0.05 wt% Y exhibited the optimal tensile properties, with elongation (EL) increasing from 7.42 % to 25.07 % and ultimate tensile strength (UTS) growing from 159.32 MPa to 400.39 MPa. The significant improvements of intermediate-temperature tensile properties by Y addition were attributed to the combined effects of grain refinement, formation of fine Ni₅Y precipitates, and an increase of twin boundaries. However, the enhancement of the plasticity was suppressed by the formation of coarse Ni₅Y phases when the excess Y was added.

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添加钇对Ni-26W-6Cr合金中温拉伸性能的增强

本文系统地研究了在700℃时Y含量对Ni-26W-6Cr-xY合金组织和力学性能的影响。结果表明，随着Y含量的增加，晶粒尺寸呈减小趋势。同时，Y元素的掺杂诱导Ni5Y相的析出，增加了合金中Σ3和Σ9型孪晶界的比例。当Y添加量为0.27 wt.%时，屈服强度由80.54 MPa提高到247.49 MPa。当Y含量为0.05 wt.%时，合金的拉伸性能最佳，伸长率（EL）从7.42%提高到25.07%，极限拉伸强度（UTS）从159.32 MPa提高到400.39 MPa。添加Y对合金中温拉伸性能的显著改善是晶粒细化、形成细小Ni5Y相和增加孪晶界的综合作用。然而，当添加过量的Y时，塑性的增强被Ni5Y粗相的形成所抑制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.