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

被引：0

作者：

Chuvil'deev, V. N. ^{[1
]}

Nokhrin, A. V. ^{[1
]}

Likhnitskii, C. V. ^{[1
]}

Murashov, A. A. ^{[1
]}

Melekhin, N. V. ^{[1
]}

Rubtsova, K. A. ^{[1
]}

Kopylov, V. I. ^{[1
]}

Bakmetyev, A. M. ^{[2
]}

Tryaev, P. V. ^{[2
]}

Vlasov, R. A. ^{[2
]}

Zotov, D. A. ^{[1
]}

Malkin, A. I. ^{[3
]}

机构：

[1] Lobachevsky Univ, Nizhnii Novgorod 603022, Russia

[2] Afrikantov Expt Design Bur Mech Engn, Nizhnii Novgorod 603074, Russia

[3] Russian Acad Sci, AN Frumkin Inst Phys Chem & Electrochem, Moscow 119071, Russia

来源：

JOURNAL OF MATERIALS SCIENCE | 2025年 / 60卷 / 09期

基金：

俄罗斯科学基金会;

关键词：

STRESS-CORROSION; MECHANICAL-PROPERTIES; ZIRCONIUM CONTENT; PURE TITANIUM; BEHAVIOR; TI; CRACKING; MICROSTRUCTURE; DIFFUSION; MODEL;

D O I：

10.1007/s10853-025-10684-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A hot salt corrosion (HSC) test was performed on the titanium alpha-alloy Ti-2.5Al-2.6Zr (Russian industrial alloy PT-7M). The ultrafine-grained (UFG) microstructure in the titanium alpha-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 degrees C and after 1000 h of annealing at 250 degrees C. Metallographic studies were carried out to investigate the effects of annealing on the nature and extent of corrosive damage in the titanium alpha-alloy Ti-2.5Al-2.6Zr. After HSC tests, surface analyses of the titanium alpha-alloy samples were conducted using X-ray diffraction and electron microscopy. During the HSC testing of the titanium alpha-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 degrees C resulted in a more pronounced increase in the uniform corrosion rate than short-term high-temperature annealing for 30 min at 500-700 degrees C. An in-depth analysis of the effect of the structure and phase composition of the grain boundaries on the susceptibility of the alpha-alloy Ti-2.5Al-2.6Zr to HSC was conducted.

引用

页码：4389 / 4411

页数：23

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