探讨高强度-延性协同双晶Mg-2.5Zn-0.2Ce合金的腐蚀行为

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

Corrosion Science Pub Date : 2025-05-26 DOI:10.1016/j.corsci.2025.113062

Weichao Zhao , Dawei Wang , Xiaorui Dong , Hailong Jia , Yajie Yang , Jin Xu , Xinlong Wang , Min Zha , Huiyuan Wang

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引用次数: 0

摘要

采用ECAP工艺制备了粗晶（基本织构）和细晶（随机织构）相结合的双晶Mg-2.5Zn-0.2Ce合金，实现了强度-塑性-防腐蚀协同作用。与粗晶结构相比，这种结构具有明显细化和均匀分布的第二相，减轻了电偶腐蚀。此外，与细晶组织相比，嵌入的粗晶具有一些不连通的亚晶界，阻碍了沿晶界的连续腐蚀进程，增强了基体的耐腐蚀性。至关重要的是，细晶粒和粗晶粒的独特分布使腐蚀产物比粗晶粒更致密，同时使腐蚀产物在细晶粒上的应力积累消散，保持了腐蚀产物的结构完整性和防护能力。

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Exploring the corrosion behavior of bimodal-grained structured Mg-2.5Zn-0.2Ce alloy with a high strength-ductility synergy

To achieve strength-ductility-anticorrosion synergy, a bimodal-grained Mg-2.5Zn-0.2Ce alloy is prepared via ECAP process, combining coarse grains (basal texture) and fine grains (random texture). This structure features a significantly refined and uniformly distributed second phase, mitigating galvanic corrosion compared to coarse-grained structure. Moreover, the embedding coarse grains with some disconnected sub-boundaries impede the continuous corrosion progression alongside grain boundaries, enhancing matrix resistance compared to fine-grained structure. Crucially, the unique arrangement of interspersed fine and coarse grains densifies the corrosion product over coarse grains, meanwhile dissipates the stress accumulation within corrosion product over fine grains, preserving its structural integrity and protective capabilities.

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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.