Influence of a rich sulphur atmosphere on the phase development and kinetic behaviour of differentially processed RNT650 γ - TiAl alloys

Research output: Contribution to journal › Research article › Contributed › peer-review

Contributors

  • T. Dudziak - , Krakow Technology Institute (Author)
  • E. Rząd - , Krakow Technology Institute (Author)
  • J. Morgiel - , Polish Academy of Sciences (Author)
  • Alexander Kirchner - , Fraunhofer Institute for Manufacturing Technology and Advanced Materials (Author)
  • T. Polczyk - , Krakow Technology Institute (Author)
  • G. Moskal - , Silesian University of Technology (Author)
  • B. Klöden - , Fraunhofer Institute for Manufacturing Technology and Advanced Materials (Author)
  • T. Weißgärber - , Fraunhofer Institute for Manufacturing Technology and Advanced Materials (Author)
  • D. Toboła - , Krakow Technology Institute (Author)
  • M. Wójcicki - , Krakow Technology Institute (Author)

Abstract

The influence of sulphur atmosphere on conventionally cast (CM) and on electron beam melted (EBM) γ - TiAl RNT650 alloy exposed to a 1% (vol.) H2S – air atmosphere at 650 °C for 500 h was investigated. The material produced by CM showed a lower mass gain than the EBM material. XRD and TEM/EDS analyses indicated the formation of rutile-TiO2/(α-Al2O3 + rutile-TiO2)/amorphous-Al2O3 sequence of phases. In EBM a coarse crystalline layer rich in aluminium, oxygen and a small amount of sulphur was found. The higher content of sulphur was in the scale bottom intermixed with amorphous alumina.

Details

Original languageEnglish
Pages (from-to)1753-1760
Number of pages8
JournalJournal of Materials Research and Technology
Volume23
Publication statusPublished - 1 Mar 2023
Peer-reviewedYes
Externally publishedYes

Keywords

ASJC Scopus subject areas

Keywords

  • A. intermetallics, B. XRD, C. oxidation, Sulphidation, TEM, Titanium