Heat Resistance of VT6 Alloy with and Without Aluminum–Chromium Diffusion Coatings at 500, 700, and 900 °C

This paper proposes a method for increasing the heat resistance of VT6 titanium alloy from 400 to 900 °C through complex saturation of its surface with aluminum and chromium in powder mixtures. The diffusion coatings formed on the alloy consist of titanium aluminides: Al 3 Ti, Al 2 Ti, AlTi, and AlT...

Full description

Saved in:
Bibliographic Details
Published in:Powder metallurgy and metal ceramics 2014-05, Vol.53 (1-2), p.48-56
Main Authors: Smokovich, I. Ya, Loskutova, T. V., Khizhnyak, V. G.
Format: Article
Language:English
Subjects:
Aluminum oxide
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Chromium
Coatings
Coatings industry
Composites
Glass
Hardness
Intermetallic compounds
Materials Science
Metallic Materials
Natural Materials
Specialty metals industry
Titanium
Titanium alloys
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper proposes a method for increasing the heat resistance of VT6 titanium alloy from 400 to 900 °C through complex saturation of its surface with aluminum and chromium in powder mixtures. The diffusion coatings formed on the alloy consist of titanium aluminides: Al 3 Ti, Al 2 Ti, AlTi, and AlTi 3 , which show high thermal stability ensured by adequate aluminum content required to create a surface alumina film. The outer coating Al 3 (Ti, Cr) layer contains 4.3–9.3 wt.% Cr, which may induce the formation of protective Cr 2 O 3 oxide besides Al 2 O 3 . Increase in the microhardness of the VT6 alloy by a factor of 2 to 2.5, resulting from complex aluminum–chromium saturation, compared with the initial state should enhance its wear resistance.
ISSN:1068-1302
1573-9066
DOI:10.1007/s11106-014-9586-2