{"title":"Evading the strength-corrosion trade-off in high-Li-content Al-Cu-Li alloy through high-pressure heat treatment and artificial aging","authors":"Hui Zhang , Zhe Yu , Ruizhi Wu , Xiaochun Ma , Xiaoyan Feng , Zhikun Ma , Nodir Turakhodjaev , Sergey Betsofen","doi":"10.1016/j.corsci.2025.112720","DOIUrl":null,"url":null,"abstract":"<div><div>Combining high-pressure heat treatment (HPHT) and artificial aging synergistically enhances the mechanical properties and corrosion resistance of high-Li-content Al-Cu-Li alloys. This study demonstrates that HPHT increases the solubility of Cu in the matrix, reducing intermetallic phase volume and promoting the precipitation of nanoprecipitates that strengthen the alloy. Additionally, it decreases micro-galvanic corrosion between intermetallic phases and the matrix, lowering the corrosion current density by three orders of magnitude compared to the T6-tempered sample, while also enhancing intergranular corrosion (IGC) resistance. Applying HPHT and artificial aging to high-Li-content Al-Cu-Li alloys effectively addresses the strength-corrosion trade-off.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"246 ","pages":"Article 112720"},"PeriodicalIF":7.4000,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Corrosion Science","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0010938X25000472","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/20 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Combining high-pressure heat treatment (HPHT) and artificial aging synergistically enhances the mechanical properties and corrosion resistance of high-Li-content Al-Cu-Li alloys. This study demonstrates that HPHT increases the solubility of Cu in the matrix, reducing intermetallic phase volume and promoting the precipitation of nanoprecipitates that strengthen the alloy. Additionally, it decreases micro-galvanic corrosion between intermetallic phases and the matrix, lowering the corrosion current density by three orders of magnitude compared to the T6-tempered sample, while also enhancing intergranular corrosion (IGC) resistance. Applying HPHT and artificial aging to high-Li-content Al-Cu-Li alloys effectively addresses the strength-corrosion trade-off.
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.
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