The effect of the local chemical composition of grain boundaries on the corrosion resistance of a titanium alloy
- Authors: Chuvil’deev V.N.1, Kopylov V.I.1,2, Nokhrin A.V.1, Bakhmet’ev A.M.3, Sandler N.G.3, Tryaev P.V.3, Kozlova N.A.1, Tabachkova N.Y.4, Mikhailov A.S.3, Chegurov M.K.1, Smirnova E.S.1
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Affiliations:
- Lobachevsky State University of Nizhny Novgorod
- Physicotechnical Research Institute
- Afrikantov Experimental Design Bureau for Mechanical Engineering
- National University of Science and Technology MISiS
- Issue: Vol 43, No 1 (2017)
- Pages: 5-8
- Section: Article
- URL: https://journals.rcsi.science/1063-7850/article/view/202173
- DOI: https://doi.org/10.1134/S1063785016120178
- ID: 202173
Cite item
Abstract
The influence of the structural-phase state of grain boundaries in a Ti4Al2V (commercial PT3V grade) pseudo-alpha-titanium alloy on its susceptibility to hot-salt intergranular corrosion (IGC) has been studied. It is established that IGC-tested alloy samples exhibit corrosion-induced defects of two types. More extended defects of the first type occur at the V-rich boundaries of coarse grains, while short defects of the second type reside at the grain boundaries with composition close to that of the grain body. The existence of the two types of IGC defects is explained by the classical theory of galvanic microcouples (microcells), according to which the IGC intensity is proportional to the difference of corrosion-active impurity concentrations between the grain boundary and body.
About the authors
V. N. Chuvil’deev
Lobachevsky State University of Nizhny Novgorod
Email: Nokhrin@nifti.unn.ru
Russian Federation, Nizhny Novgorod, 603950
V. I. Kopylov
Lobachevsky State University of Nizhny Novgorod; Physicotechnical Research Institute
Email: Nokhrin@nifti.unn.ru
Russian Federation, Nizhny Novgorod, 603950; Minsk, 220141
A. V. Nokhrin
Lobachevsky State University of Nizhny Novgorod
Author for correspondence.
Email: Nokhrin@nifti.unn.ru
Russian Federation, Nizhny Novgorod, 603950
A. M. Bakhmet’ev
Afrikantov Experimental Design Bureau for Mechanical Engineering
Email: Nokhrin@nifti.unn.ru
Russian Federation, Nizhny Novgorod, 603074
N. G. Sandler
Afrikantov Experimental Design Bureau for Mechanical Engineering
Email: Nokhrin@nifti.unn.ru
Russian Federation, Nizhny Novgorod, 603074
P. V. Tryaev
Afrikantov Experimental Design Bureau for Mechanical Engineering
Email: Nokhrin@nifti.unn.ru
Russian Federation, Nizhny Novgorod, 603074
N. A. Kozlova
Lobachevsky State University of Nizhny Novgorod
Email: Nokhrin@nifti.unn.ru
Russian Federation, Nizhny Novgorod, 603950
N. Yu. Tabachkova
National University of Science and Technology MISiS
Email: Nokhrin@nifti.unn.ru
Russian Federation, Moscow, 119049
A. S. Mikhailov
Afrikantov Experimental Design Bureau for Mechanical Engineering
Email: Nokhrin@nifti.unn.ru
Russian Federation, Nizhny Novgorod, 603074
M. K. Chegurov
Lobachevsky State University of Nizhny Novgorod
Email: Nokhrin@nifti.unn.ru
Russian Federation, Nizhny Novgorod, 603950
E. S. Smirnova
Lobachevsky State University of Nizhny Novgorod
Email: Nokhrin@nifti.unn.ru
Russian Federation, Nizhny Novgorod, 603950