Open AccessStudying Corrosion Resistance of Weld Joints of Ultrafine-Grained Titanium Alloys
Author(s) -
А. В. Нохрин,
П. В. Андреев,
C.V. Likhnitskii,
M. M. Vostokov,
В. И. Копылов,
В. Н. Чувильдеев,
D. A. Gudz,
М. К. Чегуров,
А. А. Мурашов
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1014/1/012037
Subject(s) - materials science , corrosion , metallurgy , welding , pitting corrosion , vanadium , titanium , alloy , spark plasma sintering , grain boundary , microstructure
Ultrafine-grained (UFG) samples of PT-3V near-α titanium alloy were subjected to diffusion welding using the Spark Plasma Sintering system. It has been shown that the destruction of welded UFG samples under hot salt corrosion (HSC) is two-staged – first, intercrystalline corrosion is manifested, which then graduates to pitting corrosion. It has been established that the corrosion resistance of weld joints is determined by vanadium concentration at the grain boundaries, the size and volume ratio of β-phase particles and the presence of pores in the weld joints. It has been shown that welded UFG samples possess higher hardness and corrosion resistance than coarse-grained samples.