Effect of severe plastic deformation realized by rotary swaging on the mechanical properties and corrosion resistance of near-α-titanium alloy Ti-2.5Al-2.6Zr

JOURNAL OF ALLOYS AND COMPOUNDS

卷:785

Article

Chuvil'deev, V. N.¹  Kopylov, V., I^1,2  Nokhrin, A., V¹  Tryaev, P., V³  Tabachkova, N. Yu⁴  Chegurov, M. K.¹  Kozlova, N. A.¹  Mikhaylov, A. S.³  Ershova, A., V³  Grayznov, M. Yu¹  Shadrina, I. S.¹  Likhnitskii, C., V¹ 

[1] Lobachevsky State Univ Nizhny Novgorod, 23 Gagarina Ave, Nizhnii Novgorod 603950, Russia

[2] Natl Acad Sci Belarus, Phys & Technol Inst, 10 Kuprevich St, Minsk 220141, BELARUS

[3] Russian Nucl Corp ROSATOM, Afrikantov OKBM JSC, 15 Burnakovsky Proezd, Nizhnii Novgorod 603074, Russia

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

关键词: Titanium alloys;    Fine-grained structure;    Rotary swaging;    Strength;    Hot salt corrosion;    Grain boundary;    Diffusion;   

DOI  :  10.1016/j.jallcom.2019.01.268

来源: Elsevier

【 摘 要 】

The research aims to analyze the impact that severe plastic deformation arising during Rotary Swaging has on mechanical properties and corrosion resistance of a near-alpha-titanium alloy Ti-2.5Al-2.6Zr (Russian industrial name PT7M). The nature of corrosion decay in fine-grained alloys caused by hot salt corrosion is known to vary from pit corrosion to intercrystalline corrosion at the onset of recrystallization processes. Resistance to hot salt corrosion in a fine-grained titanium alloy Ti-2.5Al-2.6Zr is shown to depend on the structural-phase state of grain boundaries that varies during their migration as a result of covering corrosive doping elements (aluminum, zirconium) distributed in the crystal lattice of a titanium alloy. (C) 2019 Elsevier B.V. All rights reserved.

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