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 4.7 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials 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

ACS Applied Bio Materials Chemistry-Chemistry (all)

CiteScore

9.40

自引率

2.10%

发文量

464

期刊介绍： ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.