Corrosion Resistance of Welded Joints in the Ultrafine-Grained Pseudo-α-Titanium Ti–5Al–2V Alloy

Corrosion Resistance of Welded Joints in the Ultrafine-Grained Pseudo-α-Titanium Ti–5Al–2V Alloy

Abstrac t—The diffusion welding of ultrafine-grained pseudo-α-titanium Ti–4.73% Al–1.88% V alloy specimens has been performed by spark plasma sintering. It has been shown that the destruction of welded joints in the ultrafine-grained (UFG) specimens under hot salt corrosion (HSC) conditions has a tw...

Full description

Saved in:
Bibliographic Details
Published in:Physics of metals and metallography Vol. 122; no. 8; pp. 761 - 767
Main Authors: Chuvil’deev, V. N., Nokhrin, A. V., Andreev, P. V., Sandler, N. G., Bakmetyev, A. M., Vostokov, M. M., Likhnitskii, K. V., Kopylov, V. I., Boldin, M. S., Gudz’, D. A., Tabachkova, N. Yu
Format: Journal Article
Language:English
Published: Moscow Pleiades Publishing 01-08-2021
Springer Nature B.V
Subjects:
Beta phase
Chemistry and Materials Science
Corrosion
Corrosion resistance
Diffusion
Grain boundaries
Materials Science
Metallic Materials
Phase Transformations
Pitting (corrosion)
Plasma sintering
Sintering (powder metallurgy)
Spark plasma sintering
Structure
Titanium base alloys
Ultrafines
Welded joints
ultrafine-grained structure
diffusion welding
titanium alloys
hot salt corrosion, grain boundaries
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Abstrac t—The diffusion welding of ultrafine-grained pseudo-α-titanium Ti–4.73% Al–1.88% V alloy specimens has been performed by spark plasma sintering. It has been shown that the destruction of welded joints in the ultrafine-grained (UFG) specimens under hot salt corrosion (HSC) conditions has a two-stage character: intercrystallite corrosion (ICC) is developed at the first stage to turn into pitting corrosion at the following stage. It has been established that the resistance to intercrystallite corrosion is governed by the concentration of vanadium on grain boundaries, the size and volumetric content of β-phase particles, and the existence of pores in a welded joint. It has been demonstrated that the welded joints of the ultrafine-grained specimens have higher hardness and resistance to intercrystallite corrosion as compared to coarse-grained specimens.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X21080056