引入层状γ′功能强化相是提高Mg-Er-Ni合金降解速率的新策略

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2025-07-01 Epub Date: 2025-03-19 DOI:10.1016/j.corsci.2025.112876

Chaoneng Dai , Zhangkang An , Shengfeng Guo , Jingfeng Wang

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引用次数: 0

摘要

研究了含LPSO和Mg₂Ni共晶的Mg- er -Ni合金的显微组织、腐蚀行为和腐蚀机理，重点研究了低温热处理前后γ′相引入的影响。热处理后，腐蚀速率提高了6.1 ~ 37.7 %，这主要是由于γ′相的高电位导致新的电偶腐蚀对的形成，这也促进了腐蚀的扩展。具有不连续晶间LPSO和高密度晶内片层γ′相的合金具有优异的降解性能。这为设计强度更高、降解速度更快的铸态镁合金压裂工具提供了新的思路。

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A new strategy for enhancement of the degradation rate of Mg-Er-Ni alloys by introducing lamellar γ´-functional strengthening phase

The microstructure, corrosion behavior, and mechanism of Mg-Er-Ni alloys with LPSO and Mg₂Ni eutectic phases are investigated, focusing on the effects of γ' phase introduction before and after low-temperature heat treatment. After heat treatment, the corrosion rate increases by 6.1–37.7 %, primarily due to the formation of new galvanic corrosion pairs caused by the high potential of the γ' phase, which also promotes corrosion propagation. Moreover, alloys with discontinuous intergranular LPSO and a high number density of intracrystalline lamellar γ' phases exhibit excellent degradation properties. This provides new insight for designing as-cast Mg alloys for fracturing tool with higher strength and faster degradation.

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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.