热处理对AlCoCrFeNi2.1共晶高熵合金组织和电化学特性的影响

IF 2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials and Corrosion-werkstoffe Und Korrosion Pub Date : 2025-04-10 DOI:10.1002/maco.202414718

Mohammadreza Hadavi, Saeed Nikabadi

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引用次数: 0

摘要

研究了退火对感应铸造法制备的AlCoCrFeNi2.1共晶高熵合金相结构和电化学性能的影响。在1150℃下进行2和10 h的退火热处理。XRD和FESEM/EDS分析结果表明，该材料具有FCC相和富al （B2）相的双相晶体结构，退火使B2相还原。电位极化调查显示，腐蚀电流密度从1.81 × 10⁻⁷（铸态）下降到9.42 × 10⁻⁷（2小时）和5.71 × 10⁻a /cm²（10小时），表明耐腐蚀性有显著改善。EIS数据证实了这些发现，电荷转移电阻（Rct）从1.01E5（铸态）增加到2.80E5 Ω。cm²（10h）总的来说，减少B2相导致腐蚀表面的腐蚀坑减少。

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The Influence of Heat Annealing on the Microstructural and Electrochemical Characteristics of AlCoCrFeNi2.1 Eutectic High Entropy Alloy

The influence of annealing on the phase structure and electrochemical properties of the AlCoCrFeNi_2.1 eutectic high entropy alloy produced by the induction casting method was investigated. The annealing heat treatment was conducted at 1150°C for 2 and 10 h. XRD and FESEM/EDS results showed a dual-phasic crystal structure with FCC and B2 (Al-rich) phases, with annealing reducing the B2 phase. Potentiodynamic polarization investigations revealed a decrease in corrosion current density from 1.81 × 10⁻⁶ (as-cast) to 9.42 × 10⁻⁷ (2 h) and 5.71 × 10⁻⁷ A/cm² (10 h), indicating significant improvement in corrosion resistance. EIS data corroborated these findings, with charge transfer resistance (Rct) increasing from 1.01E5 (as-cast) to 2.80E5 Ω. cm² (10 h). Overall, reducing the B2 phase leads to a decrease in corrosion pits on the corroded surface.

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来源期刊

Materials and Corrosion-werkstoffe Und Korrosion 工程技术-材料科学：综合

CiteScore

3.70

自引率

11.10%

发文量

199

审稿时长

1.4 months

期刊介绍： Materials and Corrosion is the leading European journal in its field, providing rapid and comprehensive coverage of the subject and specifically highlighting the increasing importance of corrosion research and prevention. Several sections exclusive to Materials and Corrosion bring you closer to the current events in the field of corrosion research and add to the impact this journal can make on your work.