退火温度对Fe35Ni30Cr20Al10Nb5 高熵合金的组织结构和性能的影响

doi:10.11901/1005.3093.2023.255

材料研究学报

2024, Vol. 38

Issue (4): 241-247 DOI: 10.11901/1005.3093.2023.255

研究论文

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退火温度对Fe₃₅Ni₃₀Cr₂₀Al₁₀Nb₅ 高熵合金的组织结构和性能的影响

李云飞¹^,²^,³, 王金贺¹^,³, 张龙¹^,³, 李正坤¹, 付华萌¹^,³(

), 朱正旺¹^,³, 李宏¹, 王爱民¹^,³, 张海峰¹^,³

^1.中国科学院金属研究所中国科学院核用材料与安全评价重点实验室沈阳 110016
^2.中国科学技术大学材料科学与工程学院沈阳 110016
^3.中国科学院金属研究所师昌绪先进材料创新中心沈阳 110016

Effect of Annealing Temperature on Microstructure and Properties of a High-entropy Alloy Fe₃₅Ni₃₀Cr₂₀Al₁₀Nb₅

LI Yunfei¹^,²^,³, WANG Jinhe¹^,³, ZHANG Long¹^,³, LI Zhengkun¹, FU Huameng¹^,³(

), ZHU Zhengwang¹^,³, LI Hong¹, WANG Aimin¹^,³, ZHANG Haifeng¹^,³

^1.CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^2.School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
^3.Shi -Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

引用本文:

李云飞, 王金贺, 张龙, 李正坤, 付华萌, 朱正旺, 李宏, 王爱民, 张海峰. 退火温度对Fe₃₅Ni₃₀Cr₂₀Al₁₀Nb₅ 高熵合金的组织结构和性能的影响[J]. 材料研究学报, 2024, 38(4): 241-247.
Yunfei LI, Jinhe WANG, Long ZHANG, Zhengkun LI, Huameng FU, Zhengwang ZHU, Hong LI, Aimin WANG, Haifeng ZHANG. Effect of Annealing Temperature on Microstructure and Properties of a High-entropy Alloy Fe₃₅Ni₃₀Cr₂₀Al₁₀Nb₅[J]. Chinese Journal of Materials Research, 2024, 38(4): 241-247.

全文: PDF(14630 KB) HTML

摘要:

系统地研究了退火处理温度对低熔点高熵合金Fe₃₅Ni₃₀Cr₂₀Al₁₀Nb₅(摩尔比)的组织结构和性能的影响。结果表明：随着退火温度的提高，铸态Fe₃₅Ni₃₀Cr₂₀Al₁₀Nb₅合金中富Fe-Cr元素的fcc相的体积分数逐渐减少，Laves相和B2-NiAl相的体积分数逐渐增大。准静态压缩实验结果表明，铸态样品的压缩塑性变形能力良好。随着退火处理温度的提高合金的屈服强度先提高后降低，在700℃退火的样品其屈服强度最高(为1247.7 MPa)，但是塑性变形量比铸态有所降低。压缩屈服强度随退火处理温度降低，可归因于基体fcc相在高温下的分解。电化学测试结果表明，这种合金的耐腐蚀能力随退火处理温度的提高而单调提高，在900℃退火的样品其腐蚀电位为-72.02 mV。

关键词 ：金属材料, 高熵合金, 退火处理, 力学性能, 耐腐蚀性能

Abstract：

The effect of annealing-temperature on the microstructure and properties of the low-melting point high-entropy alloy Fe₃₅Ni₃₀Cr₂₀Al₁₀Nb₅ (molar ratio) were systematically investigated. The results show that with the increasing annealing-temperature, the volume fraction of Fe-Cr-rich fcc phase gradually decreases, while the volume fraction of Laves phase and B2-NiAl phase gradually increases for the as-cast alloy. The quasi-static compression test results show that the as-cast alloy has good compressive plastic deformation ability, and the yield strength of the alloy increases and then decreases as the annealing-temperature increases. The decrease in compression yield strength with the rising annealing-temperature is mainly attributed to the decomposition of the fcc phase at higher temperatures. The electrochemical test results show that the corrosion resistance of the alloy increases monotonically with the annealing-temperature, and the free-corrosion potential of the alloy annealed at 900^oC is -72.02 mV.

Key words： metallic materials high entropy alloy annealing treatment mechanical properties corrosion resistance

收稿日期: 2023-05-08

ZTFLH:

TG13

基金资助:国家重点研发计划(2021YFA0716303);中核集团领创科研项目;中国科学院0到1项目

通讯作者: 付华萌，研究员，hmfu@imr.ac.cn，研究方向为非晶合金制备技术

Corresponding author: FU Huameng, Tel: 13654219196, E-mail: hmfu@imr.ac.cn

作者简介: 李云飞，男，1998年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2023.255 或 https://www.cjmr.org/CN/Y2024/V38/I4/241

图1 不同状态Fe35Ni30Cr20Al10Nb5高熵合金的XRD谱

图2 不同状态Fe35Ni30Cr20Al10Nb5高熵合金的微观形貌

图3 不同状态Fe35Ni30Cr20Al10Nb5高熵合金的EDS面分布

表1 不同状态Fe35Ni30Cr20Al10Nb5高熵合金的EDS结果

图4 不同状态Fe35Ni30Cr20Al10Nb5高熵合金的准静态压缩性能

图5 不同状态的Fe35Ni30Cr20Al10Nb5高熵合金的动电位极化曲线

表2 不同状态Fe35Ni30Cr20Al10Nb5高熵合金在3.5%NaCl(质量分数)溶液中的腐蚀参数

表3 Fe、Ni、Cr、Al、Nb二元合金的混合焓[19]

图6 不同状态Fe35Ni30Cr20Al10Nb5高熵合金的准静态压缩断口形貌

图7 不同状态Fe35Ni30Cr20Al10Nb5高熵合金的电化学腐蚀形貌

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