确定2024铝合金在薄电解质层环境下不同热处理应力腐蚀开裂的控制因素

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-05-19 DOI:10.1016/j.matchar.2025.115183

Hao Wu , Liwei Wang , Guixue Bian , Ziyangyang Wei , Huiyun Tian , Zhongyu Cui

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引用次数: 0

摘要

研究了热处理对2024铝合金应力腐蚀开裂（SCC）行为的影响及其控制过程。自然时效（NA）对合金的组织和性能影响不大，而人工时效可以改变Al2CuMg相、晶界沉淀（GBPs）和位错，从而影响SCC的敏感性。峰值时效态（PA）具有最高的SCC敏感性，这是由于连续的GBPs增加了阳极溶解敏感性和高位错密度促进了氢脆。因此，SCC的控制步骤由NA条件下的腐蚀转变为人工时效条件下腐蚀、氢和应力的协同作用。

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Determining the controlling factor of the stress corrosion cracking of 2024 aluminum alloy with different heat treatments in thin electrolyte layer environment

Effect of heat treatment on the stress corrosion cracking (SCC) behavior and its controlling process of 2024 aluminum alloy is investigated. Natural aging (NA) shows little effect on the microstructure and properties of the alloy, while artificial aging can alter the Al₂CuMg phase, grain boundary precipitates (GBPs), and dislocations to affect SCC sensitivity. Peak aging (PA) state has the highest SCC sensitivity, attributed to the continuous GBPs that increase anodic dissolution sensitivity and the high dislocation density that facilitates hydrogen embrittlement. Therefore, the controlling step of SCC changes from corrosion under NA to synergistic effect between corrosion, hydrogen and stress under artificial aging.

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.