Mechanism of cryorolling and aging treatment for enhancing corrosion properties of 2195 Al−Li alloy

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING Transactions of Nonferrous Metals Society of China Pub Date : 2025-01-01 Epub Date: 2025-01-23 DOI:10.1016/S1003-6326(24)66662-8

Yue XIAO , Wen-shuai WANG , Waqas FARID , Li-hua ZHANG , Charlie KONG , Hai-liang YU

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Abstract

The impact of cryorolling (CR) and room temperature rolling (RTR) followed by artificial aging on the corrosion characteristics of 2195 Al−Li alloy (AA2195) was studied. Transmission electron microscope, scanning electron microscope, optical microscope, intergranular corrosion experiment, and electrochemical experiment were used. Throughout different stages of aging treatment, the corrosion behavior of both CR and RTR samples exhibited a sequential progression of pitting corrosion, followed by intergranular corrosion, and then pitting corrosion again. The corrosion rates of both samples initially showed an increase, followed by a gradual stabilization over time. The size and density of T₁ phase significantly influenced the corrosion performance of the alloy. During the peak aging and over-aging stages, the CR sample exhibited superior corrosion resistance to the RTR sample, attributed to its finer T₁ phase.

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冷滚时效处理提高2195 Al−Li合金腐蚀性能的机理

研究了低温轧制（CR）和室温轧制（RTR）再人工时效对2195 Al−Li合金（AA2195）腐蚀特性的影响。采用透射电镜、扫描电镜、光学显微镜、晶间腐蚀实验和电化学实验。在时效处理的不同阶段，CR和RTR试样的腐蚀行为均表现为点蚀→晶间腐蚀→再→点蚀的顺序。两种样品的腐蚀速率最初都表现为增加，随后随着时间的推移逐渐稳定。T1相的尺寸和密度对合金的腐蚀性能有显著影响。在峰值时效和过时效阶段，CR样品表现出优于RTR样品的耐蚀性，这是由于CR样品具有更细的T1相。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.