Corrosion resistance of ultrafine-grained pseudo-α titanium alloy PT-3V

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...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2020-12, Vol.1008 (1), p.12024
Main Authors: Nokhrin, A V, Kopylov, V I, Andreev, P V, Chuvil'deev, V N, Likhnitsckii, C V, Chegurov, M K, Murashov, A A, Gudz', D A
Format: Article
Language:English
Subjects:
Beta phase
Corrosion resistance
Corrosion resistant alloys
Grain boundaries
Pitting (corrosion)
Plasma sintering
Sintering (powder metallurgy)
Spark plasma sintering
Titanium alloys
Titanium base alloys
Ultrafines
Welded joints
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Summary: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.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/1008/1/012024