通过工业级原材料形成的碳化物相提高 (CoFeNiMn)100-xCrx (x = 5, 20, 35 at.%) 高熵合金的强度

IF 2.4 4区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Testing Pub Date : 2024-03-13 DOI:10.1515/mt-2023-0363

Gökhan Polat

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引用次数: 0

摘要

(CoFeNiMn)100-xCrx（x = 5、20、35 at.%）HEA 采用真空电弧熔炼法生产，随后使用工业级原材料进行吸铸，并在 1150 °C 下退火 24 小时。由于原材料中存在 C 杂质，铬含量的增加会在催化裂化基体中形成 Cr7C3。由于基体中嵌入了 Cr7C3 相，将铬含量从 5%提高到 35%后，硬度从 206 (±7) HV 提高到 383 (±4) HV，屈服强度从 210 MPa 提高到 350 MPa。铬含量为 20% 的 HEA 是最有发展前景的合金，因为它在强度-电导率之间进行了权衡，抗压屈服强度为 350 兆帕，应变为 10.7%。通过使用工业级低成本原材料提高 HEA 的机械性能，可使其成为更具吸引力的工业应用材料。

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Enhanced strength of (CoFeNiMn)100−xCrx (x = 5, 20, 35 at.%) high entropy alloys via formation of carbide phases produced from industrial-grade raw materials

(CoFeNiMn)100−xCrx (x = 5, 20, 35 at.%) HEAs were produced using vacuum arc melting followed by suction casting using industrial-grade raw materials and subsequent annealing at 1150 °C for 24 h. The increasing Cr content triggered the formation of the Cr7C3 in the FCC matrix due to the presence of C impurity in the raw materials. The increasing Cr content from 5 to 35 at.% raised the hardness from 206 (±7) to 383 (±4) HV and yield strength from 210 to 350 MPa due to the embedded Cr7C3 phases in the matrix. The HEA consists of 20 at.% Cr was found to be the most promising alloy due to the strength-ductility trade-off with the values of 350 MPa compressive yield strength and 10.7 % strain. The enhanced mechanical properties of the HEAs by using industrial-grade low-cost raw materials could make them more attractive materials for industrial applications.

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来源期刊

Materials Testing 工程技术-材料科学：表征与测试

CiteScore

4.20

自引率

36.00%

发文量

165

审稿时长

4-8 weeks

期刊介绍： Materials Testing is a SCI-listed English language journal dealing with all aspects of material and component testing with a special focus on transfer between laboratory research into industrial application. The journal provides first-hand information on non-destructive, destructive, optical, physical and chemical test procedures. It contains exclusive articles which are peer-reviewed applying respectively high international quality criterions.