Open AccessCorrosion resistance of ultrafine-grained pseudo-α titanium alloy PT-3V
Author(s) -
А. В. Нохрин,
В. И. Копылов,
П. В. Андреев,
В. Н. Чувильдеев,
C V Likhnitsckii,
М. К. Чегуров,
А. А. Мурашов,
D. A. Gudz
Publication year - 2020
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/1008/1/012024
Subject(s) - materials science , metallurgy , corrosion , spark plasma sintering , alloy , welding , vanadium , titanium , pitting corrosion , grain boundary , microstructure
Ultrafine-grained (UFG) samples of PT-3V pseudo-α titanium alloy were subjected to diffusion welding through spark plasma sintering. It has been shown that the destruction of welded UFG samples under hot salt corrosion (HSC) is two-staged: first, intercrystalline corrosion (ICC) is manifested, which then graduates to pitting corrosion. It has been established that the corrosion resistance of the weld joints is determined by the concentration of vanadium at the grain boundaries, the size and volume ratio of the β-phase particles, and the presence of pores in the weld joints. It has been shown that welded UFG samples possess a higher hardness and resistance to ICC than coarse-grained samples.