Publication detail

Isothermal oxidation behavior of experimental Ti-Al-Si alloys at 700 °C in air

TKACHENKO, S. DATSKEVICH, O. DVOŘÁK, K. SPOTZ, Z. KULAK, L. ČELKO, L.

Original Title

Isothermal oxidation behavior of experimental Ti-Al-Si alloys at 700 °C in air

Type

journal article in Web of Science

Language

English

Original Abstract

In the present work the oxidation kinetics of a series of experimental TiAlSi based alloys, additionally alloyed by zirconium and tin, was studied upon isothermal exposure at 700 C in ambient air and compared with that of a commercially available Ti6242 alloy. Examinations of the oxide scale microstructure, its phase composition and crystal morphology along with the measurements of the alpha-case thickness were performed in order to elucidate the oxidation mechanism of TiAlSi based alloys. The oxidation rates of the experimental alloys obeyed a parabolic relationship and were 1.5e2 times lower than those of the reference Ti6242 alloy. The alloying of the base Ti6Al1.4Si alloy with zirconium strongly reduced its oxidation rate, while the effect of tin addition appeared to be slightly deleterious. The zirconium addition reduced the thickness of the oxide scale and hindered recrystallization of the rutile crystals in the surface oxide layer. At the same time, the additional alloying with tin had practically no effect on the size of rutile crystals. The thickness of alpha-case was found to depend on the oxidation dwell time and followed a parabolic relationship. The most noticeable effect in reducing the alpha-case thickness was provided by zirconium addition, while the effect of additional alloying with tin on alphacase was slightly unfavorable.

Keywords

Titanium alloys; Silicon; Oxidation; Oxide scale; Diffusion

Authors

TKACHENKO, S.; DATSKEVICH, O.; DVOŘÁK, K.; SPOTZ, Z.; KULAK, L.; ČELKO, L.

Released

31. 1. 2017

Publisher

Elsevier

Location

Netherlands

ISBN

0925-8388

Periodical

Journal of Alloys and Compounds

Year of study

694

Number

1

State

Swiss Confederation

Pages from

1098

Pages to

1108

Pages count

10

URL

http://dx.doi.org/10.1016/j.jallcom.2016.10.044

BibTex

@article{BUT130386,
  author="Serhii {Tkachenko} and Oleg {Datskevich} and Karel {Dvořák} and Zdeněk {Spotz} and Leonid {Kulak} and Ladislav {Čelko}",
  title="Isothermal oxidation behavior of experimental Ti-Al-Si alloys at 700 °C in air",
  journal="Journal of Alloys and Compounds",
  year="2017",
  volume="694",
  number="1",
  pages="1098--1108",
  doi="10.1016/j.jallcom.2016.10.044",
  issn="0925-8388",
  url="http://dx.doi.org/10.1016/j.jallcom.2016.10.044"
}