Study of mechanical properties and corrosive resistance of ultrafine-grained α-titanium alloy Ti-5Al-2V

被引：39

作者：

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

Kopylov, V. I. ^{[1
,2
]}

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

Tryaev, P. V. ^{[3
]}

Kozlova, N. A. ^{[1
]}

Tabachkova, N. Yu. ^{[4
]}

Lopatin, Yu G. ^{[1
]}

Ershova, A. V. ^{[3
]}

Mikhaylov, A. S. ^{[3
]}

Gryaznov, M. Yu. ^{[1
]}

Chegurov, M. K. ^{[1
]}

机构：

[1] Natl Res Univ, Lobachevsky State Univ Nizhny Novgorod, Nizhnii Novgorod 603950, Russia

[2] Natl Acad Sci Belarus, Inst Phys & Technol, Minsk 220141, BELARUS

[3] Afrikantov OKBM JSC, Afrikantov Expt Design Bur Mech Engn JSC, Nizhnii Novgorod 603074, Russia

[4] Natl Univ Sci & Technol MISIS, Moscow 119049, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 723卷

基金：

俄罗斯科学基金会;

关键词：

Titanium alloys; Equal channel angular pressing; Grain boundary segregations; Corrosion resistance; Strength; Plasticity; SALT STRESS-CORROSION; SEVERE PLASTIC-DEFORMATION; HOT; BEHAVIOR; TEMPERATURE; CRACKING; RECRYSTALLIZATION; MICROSTRUCTURE; EVOLUTION; STRENGTH;

D O I：

10.1016/j.jallcom.2017.06.220

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The research has been conducted into the impact that structural-phase state of grain boundaries in alpha-titanium alloy Ti-5Al-2V has on strength, plasticity and susceptibility to intercrystalline corrosion (ICC). It is found that during Equal Channel Angular Pressing (ECAP) performed at elevated temperatures there is a change in local concentration of alloying elements (aluminum, vanadium) along alpha-Ti grain boundaries. The current study proves that by controlling the structure of a-titanium alloy Ti-5Al-2V through ECAP it is possible to enhance its strength and resistance to hot salt intercrystalline corrosion. Plasticity of ultrafine-grained (UFG) alloy samples at room temperature is comparable with plasticity of a coarse-grained material, while plasticity of an UFG alloy at elevated temperatures is 2-3 times bigger than plasticity of a coarse-grained material. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：354 / 367

页数：14

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