Effect of annealing on the hot salt corrosion resistance of the fine-grained titanium α-alloy Ti–2.5Al–2.6Zr obtained via cold rotary swaging

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2025-02-19 DOI:10.1007/s10853-025-10684-1

V. N. Chuvil’deev, A. V. Nokhrin, C. V. Likhnitskii, A. A. Murashov, N. V. Melekhin, K. A. Rubtsova, V. I. Kopylov, A. M. Bakmetyev, P. V. Tryaev, R. A. Vlasov, D. A. Zotov, A. I. Malkin

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引用次数: 0

Abstract

A hot salt corrosion (HSC) test was performed on the titanium α-alloy Ti–2.5Al–2.6Zr (Russian industrial alloy PT–7M). The ultrafine-grained (UFG) microstructure in the titanium α-alloy was formed via cold rotary swaging. The grain size and volume fraction of the recrystallized microstructure in the alloy were varied by choosing appropriate annealing temperatures and times. The microstructure and corrosion resistance of UFG alloys were studied after 30 min of annealing at 500–700 °C and after 1000 h of annealing at 250 °C. Metallographic studies were carried out to investigate the effects of annealing on the nature and extent of corrosive damage in the titanium α-alloy Ti–2.5Al–2.6Zr. After HSC tests, surface analyses of the titanium α-alloy samples were conducted using X-ray diffraction and electron microscopy. During the HSC testing of the titanium α-alloy Ti–2.5Al–2.6Zr, a competitive interaction between intergranular corrosion (IGC) and pitting corrosion was observed. To the best of our knowledge, it was shown for the first time that annealing affects the relationship among the IGC, pitting corrosion and uniform corrosion rates of the titanium alloy. Prolonged low-temperature annealing at 250 °C resulted in a more pronounced increase in the uniform corrosion rate than short-term high-temperature annealing for 30 min at 500–700 °C. An in-depth analysis of the effect of the structure and phase composition of the grain boundaries on the susceptibility of the α-alloy Ti–2.5Al–2.6Zr to HSC was conducted.

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.