Effects of Y Additions on the Microstructure and Mechanical Properties of CoCr1.7Ni Medium-Entropy Alloys

被引：0

作者：

Zhou, Shaoshuai ^{[1
]}

Shu, Xiaoyong ^{[1
]}

Hu, Linli ^{[2
]}

Yuan, Xunyu ^{[1
]}

Qiu, Panpan ^{[1
]}

Xu, Xiwen ^{[1
]}

机构：

[1] Nanchang Hangkong Univ, Jiangxi Prov Engn Res Ctr Surface Technol Aeronaut, Nanchang 330063, Peoples R China

[2] Jiangxi Vocat Coll Mech & Elect Technol, Sch Mech Engn, Nanchang 330013, Peoples R China

来源：

CRYSTALS | 2025年 / 15卷 / 02期

关键词：

medium-entropy alloys; rare earth element; yttrium addition; microstructure; mechanical properties; SOLID-SOLUTION; PERFORMANCE; ELEMENT;

D O I：

10.3390/cryst15020172

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

In order to improve the room temperature yield strength of X and enhance its engineering applicability, a series of CoCr1.7NiYx (x = 0, 0.01, 0.02, 0.03, 0.04, and 0.1 at.%) medium-entropy alloys were synthesized to investigate the effect of Y addition on the microstructures and mechanical properties of the CoCr1.7Ni-based alloy. The X-ray diffraction results show that the alloys exhibit face-centered cubic (FCC) + body-centered cubic (BCC) + hexagonal close packing (HCP) triphasic structure when the Y is adopted, whereas the CoCr1.7Ni-based alloy has a FCC+BCC biphasic structure. The volume fraction of BCC and HCP phase increased with increasing Y content, which led to alloy grain refinement. As a result, the microhardness and strength of alloys were both enhanced. The addition of Y resulted in dispersion strengthening and solid solution strengthening of CoCr1.7Ni alloy, the appearance of HCP, and an increase in BCC, which improved the room temperature yield strength and hardness of CoCr1.7Ni alloy. In particular, for CoCr1.7NiY0.1 alloy, its microhardness and yield strength, respectively, increased by 98.18% and 260.59% as compared with those of CoCr1.7Ni alloy.

引用

页数：14

共 38 条

[1] Yeh J.W., Chen S.K., Lin S.J., Gan J.Y., Chin T.S., Shun T.T., Tsau C.H., Chang S.Y., Nanostructured high-entropy alloys with multiple principal elements: Novel alloy design concepts and outcomes, Adv. Eng. Mater, 6, pp. 299-303, (2004)
[2] Yu-sheng T., Wen-zhe Z., Qing-biao T., Ming-xu W., Shen Q., Guo-liang Z., Da S., Bao-de S., A review of refractory high-entropy alloys, Trans. Nonferrous Met. Soc. China, 32, pp. 3487-3515, (2022)
[3] Zhuo L., Xie Y., Chen B., A review on recent progress of refractory high entropy alloys: From fundamental research to engineering applications, J. Mater. Res. Technol, 33, pp. 1097-1129, (2024)
[4] Yeh J.W., Recent progress in high-entropy alloys, Ann. Chim. Sci. Des Mater, 31, pp. 633-648, (2006)
[5] Gou X., Cao R., Zhou W., Shen Z., Li Y., Microstructures, mechanical properties, and strengthening mechanisms of the (NbMoTa)100−xCx refractory medium-entropy alloys, J. Mater. Sci. Technol, 214, pp. 105-119, (2024)
[6] Shi C., Tan X., Xiao S., Su C., Guo N., Guo S., AlxHfTaTi (0 ≤ x ≤ 0.5) refractory medium entropy alloys with excellent room-temperature tensile properties, Mater. Sci. Eng. A, 909, (2024)
[7] Zhou Z., Wang M., Li W., Zhao S., Lu Y., A novel Cu-containing TiZrNb-based medium entropy alloy with excellent mechanical properties, antibacterial activity and biocompatibility, Intermetallics, 171, (2024)
[8] Laplanche G., Gadaud P., Horst O., Otto F., Eggeler G., George E.P., Temperature dependencies of the elastic moduli and thermal expansion coefficient of an equiatomic. single-phase CoCrFeMnNi high-entropy alloy, J. Alloys Compd, 623, pp. 348-353, (2015)
[9] Haiping Z., Jingxiang M., Hui J., Hongbin Z., Wenqing W., Shengxue Q., Lv T., Jian X., Effect of rare-earth element Y addition on microstructure and mechanical properties of CrFeNi2 medium entropy alloy, Intermetallics, 163, (2023)
[10] Laplanche G., Kostka A., Reinhart C., Hunfeld J., Eggeler G., George E.P., Reasons for the superior mechanical properties of medium-entropy CrCoNi compared to high-entropy CrMnFeCoNi, Acta Mater, 128, pp. 292-303, (2017)

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