Nb合金化Ni<sub>0.6</sub>CoFe<sub>1.4</sub>合金的强塑性协同

吴健; 朱和国; 谢宗翰

doi:10.1007/s12613-022-2567-4

Volume 30 Issue 4

Apr. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(4): 707-714

Jian Wu, Heguo Zhu, and Zonghan Xie, Strength and ductility synergy of Nb-alloyed Ni_0.6CoFe_1.4 alloys, Int. J. Miner. Metall. Mater., 30(2023), No. 4, pp. 707-714. https://doi.org/10.1007/s12613-022-2567-4

Cite this article as:

Jian Wu, Heguo Zhu, and Zonghan Xie, Strength and ductility synergy of Nb-alloyed Ni0.6CoFe1.4 alloys, Int. J. Miner. Metall. Mater., 30(2023), No. 4, pp. 707-714. https://doi.org/10.1007/s12613-022-2567-4

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研究论文

Nb合金化Ni_0.6CoFe_1.4合金的强塑性协同

1)
南京理工大学材料科学与工程学院，南京 210094，中国
2)
School of Mechanical Engineering, University of Adelaide, SA 5005, Australia

通讯作者:
朱和国 E-mail: zhg1200@njust.edu.cn

文章亮点

(1) 系统地研究了Nb含量对Ni_0.6CoFe_1.4Nb_x中熵合金微观组织的影响规律

(2) 详细地讨论了Nb含量对Ni_0.6CoFe_1.4Nb_x中熵合金力学性能的影响

(3) 优化Nb含量可以获得塑韧协同的Ni_0.6CoFe_1.4Nb_x中熵合金

中文摘要

中熵合金具有许多优于传统合金的特殊性能受到了广泛关注。然而设计出具有高强度和可接受塑性的体心立方型中熵合金仍然是一个巨大挑战。本文拟通过在BCC基体中引入面心立方相（FCC）形成双相微观结构来解决体心立方型中熵合金的强度和塑性平衡问题。采用真空感应熔炼法制备了Ni_0.6CoFe_1.4Nb_x（x = 0、0.05、0.08、0.10和0.15）中熵合金，并研究了Nb元素对Ni_0.6CoFe_1.4合金的晶体结构、微观组织和室温力学性能的影响。微观结构表明，该合金由BCC和FCC双相组成，微观形貌为网状结构，其中BCC相是该合金体系中的主要相。随着Nb含量的增加，合金的强度先减小后增大，塑性先增大后减小。此外，Ni_0.6CoFe_1.4Nb_x合金的断裂机制由韧性断裂向脆性断裂转变。Ni_0.6CoFe_1.4Nb_0.10 合金显示出最佳的强度和塑性组合，即相比较于Ni_0.6CoFe_1.4合金，Ni_0.6CoFe_1.4Nb_0.10合金的塑性增加了两倍（11.6%），并展现出最高的极限拉伸强度（869.8 MPa）。合金强度提高归因于固溶强化、沉淀硬化效应和界面强化效应的协同作用。

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Research Article

Strength and ductility synergy of Nb-alloyed Ni_0.6CoFe_1.4 alloys

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Abstract

Abstract

Designing strong, yet ductile, and body-centered cubic (BCC) medium-entropy alloys (MEAs) remains to be a challenge nowadays. In this study, the strength–ductility trade-off of Ni_0.6CoFe_1.4 MEAs was tackled via introducing a BCC + face-centered cubic (FCC) dual-phase microstructure. Ni_0.6CoFe_1.4Nb_x (x = 0, 0.05, 0.08, 0.10, and 0.15, in molar ratio) MEAs were prepared using vacuum induction melting. Results show that the new alloy is composed of BCC plus FCC dual phases featuring a network-like structure, and the BCC phase is the main phase in this alloy system. Moreover, the Nb0.10 MEA shows high strength and respectable tensile ductility, representing the best combination of the strength and fracture elongation among the alloys studied here. The remarkable strength of the Nb0.10 MEA is attributed to the combined effect of the solid solution strengthening, the precipitation hardening effect and the interface strengthening effect.
- medium-entropy alloys;
- alloying;
- microstructure;
- mechanical properties;
- strengthening

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References

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Nb合金化Ni_0.6CoFe_1.4合金的强塑性协同

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Strength and ductility synergy of Nb-alloyed Ni_0.6CoFe_1.4 alloys

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Nb合金化Ni0.6CoFe1.4合金的强塑性协同

文章亮点

中文摘要

Strength and ductility synergy of Nb-alloyed Ni0.6CoFe1.4 alloys

Abstract

References

数据统计

Catalog

Nb合金化Ni_0.6CoFe_1.4合金的强塑性协同

Strength and ductility synergy of Nb-alloyed Ni_0.6CoFe_1.4 alloys