Simultaneous improvement of mechanical properties and corrosion resistance of D019-strengthened high-entropy alloys via tailored microstructures

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-07-16 DOI:10.1016/j.corsci.2025.113193

Xier Luo , Jianyang Zhang , Tzu-hsiu Chou , Jie Gan , Jiang Ju , Yinghao Zhou , Tao Yang

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Abstract

To develop corrosion-resistant alloys with superior mechanical properties, we have successfully designed a novel D0₁₉-strengthened high-entropy alloy (HEA) with tailored microstructures. By introducing dispersive granular D0₁₉ phases, the directional lamellar and granular structured (DLGS) alloy showed improved mechanical properties (from 420 to 870 MPa) and nobler pitting potentials (from 183 to 384 mV_SCE) than the traditional non-directional lamellar structured (NDLS) D0₁₉-strengthened counterpart. We found that the increased localized corrosion resistance of DLGS alloy was attributed to the higher content of Cr₂O₃ and Fe₂O₃ in the passive film and a lower tendency of galvanic corrosion. Meanwhile, the expanded proportion of hydroxides within the passive film and the rapid dissolution kinetics in the transpassive region increased the pitting susceptibility of the NDLS alloy.

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通过定制组织提高d019强化高熵合金的力学性能和耐蚀性

为了开发具有优异力学性能的耐腐蚀合金，我们成功设计了一种具有定制显微组织的新型d019强化高熵合金（HEA）。与传统的非定向片层结构（NDLS） D019强化合金相比，通过引入分散颗粒相D019，定向片层和颗粒结构（DLGS）合金的力学性能得到改善（从420 ~ 870 MPa），点蚀电位从183 ~ 384 mVSCE。结果表明，DLGS合金抗局部腐蚀性能的提高是由于钝化膜中Cr2O3和Fe2O3含量的增加和电偶腐蚀倾向的降低。同时，钝化膜内氢氧化物比例的扩大和通过区的快速溶解动力学增加了NDLS合金的点蚀敏感性。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.