| 激光熔覆FeCoCrNiNb高熵合金涂层组织及力学性能 |
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| 引用本文： | 王石,王琳,尹晓伟.激光熔覆FeCoCrNiNb高熵合金涂层组织及力学性能[J].稀有金属材料与工程,2023,52(4):1483-1489. |
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| 作者姓名： | 王石 王琳 尹晓伟 |
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| 作者单位： | 沈阳工程学院机械学院,沈阳工程学院机械学院,沈阳工程学院机械学院 |
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| 基金项目： | 国家自然科学基金资助(62001312) |
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| 摘 要： | 采用激光熔覆技术在304不锈钢表面制备了FeCoCrNi、FeCoCrNiNb等摩尔比高熵合金熔覆层，研究了Nb元素对熔覆层组织及性能的影响。采用XRD、SEM、EDS、纳米压痕测试和干滑动摩擦磨损实验等方法，详细分析了2种高熵合金熔覆层的相组成、组织演变、纳米硬度及耐磨性能。结果表明：FeCoCrNiNb高熵合金熔覆层相组成为fcc固溶体及富Nb-Laves相。FeCoCrNiNb熔覆层的纳米硬度(H)、弹性模量(E)、H/E和H3/E2分别为6.066 GPa、231.54 GPa、0.0262和0.0042，远高于FeCoCr Ni熔覆层的3.456 GPa、209.48 GPa、0.0165和0.000 94。随着纳米硬度的增加，FeCoCrNiNb熔覆层的摩擦系数和比磨损率也随之降低，分别为0.519和2.54×10-6mm3/(N·m)。综上所述，FeCoCrNiNb高熵合金熔覆层具有良好的纳米硬度和耐磨性。
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| 关 键 词： | 高熵合金 激光熔覆 Laves相 纳米压痕 耐磨性 |
| 收稿时间： | 2022/11/11 0:00:00 |
| 修稿时间： | 2022/12/7 0:00:00 |
Microstructure and mechanical properties of laser cladding FeCoCrNiNb high entropy alloy coating |
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| Wang Shi,Wang Lin and Yin Xiaowei.Microstructure and mechanical properties of laser cladding FeCoCrNiNb high entropy alloy coating[J].Rare Metal Materials and Engineering,2023,52(4):1483-1489. |
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| Authors: | Wang Shi Wang Lin and Yin Xiaowei |
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| Affiliation: | School of Mechanical Engineering,Shenyang Institute of Engineering,School of Mechanical Engineering,Shenyang Institute of Engineering,School of Mechanical Engineering,Shenyang Institute of Engineering |
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| Abstract: | A FeCrCoNiNb high entropy alloy (HEA) coating was deposited by laser cladding, aiming at studying the influence of Nb addition on hardness and wear resistance. The formed phases, microstructural evolution, nano-hardness and wear behavior of the FeCrCoNiNb HEA coating was clarified by using XRD, SEM, nano-hardness measurement and friction-wear measurement. The results showed that the FeCrCoNiNb high-entropy alloy coating were composed by FCC solid solution and Nb-Laves phase. The nano-hardness (H), elastic modulus (H), H/E and H3/E2 of FeCrCoNiNb coating were 6.066GPa, 231.54GPa, 0.0262 and 0.0042, respectively. Which were much higher than FeCrCoNi coating of 3.456GPa, 209.48GPa, 0.0165 and 0.00094. With the increased of nano-hardness, the friction coefficient and specific wear rate of FeCrCoNiNb coating also decreased, which were 0.519 and 2.54×10-6mm3/N.m, respectively. The addition of Nb can effectively improve the nano-hardness and wear resistance of FeCrCoNi high-entropy alloy coating. |
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| Keywords: | High entropy alloy Laser cladding Laves phase Nanoindentation wear |
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