Peculiarities of structural changes and diffusion distribution of alloying elements in titanium alloys after mechanical-pulse treatment

Olha Kyryliv 1Julia A. Budniak 1Hryhoriy Nykyforchyn Krzysztof J. Kurzydłowski 

1. Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland

Abstract

The influence of mechanical-pulse treatment (MPT) on diffusion (mass transfer) of alloying elements in surface layers of titanium alloys has been investigated. The studied materials were pure titanium VT1-0 (α-structure) and titanium alloy VT6 (α+β-structure). The MPT was carried out in special environments for carburizing and for nitriding. The results of investigations show that concentration of nitrogen and carbon in surface layers after MPT is higher in comparison to the virgin materials. The mechanism of diffusion of alloying elements from the technological environment to surface layers under conditions of high speed thermoplastic deformation is discussed. This fast diffusion leads to changes in structure and phase compositions of the treated surface layers and improvement of their physical and mechanical properties.

 

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Presentation: Poster at E-MRS Fall Meeting 2008, Symposium K, by Olha Kyryliv
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-05-19 11:06
Revised:   2009-06-07 00:48