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

T. Dudziak; E. Rząd; J. Morgiel; A. Kirchner; T. Polczyk; G. Moskal; B. Klöden; T. Weißgärber; D. Toboła; M. Wójcicki

Journal of Materials Research and Technology (Mar 2023)

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

T. Dudziak,
E. Rząd,
J. Morgiel,
A. Kirchner,
T. Polczyk,
G. Moskal,
B. Klöden,
T. Weißgärber,
D. Toboła,
M. Wójcicki

Affiliations

T. Dudziak: Łukasiewicz Research Network– Krakow Institute of Technology, 73 Zakopianska Str., 30-418, Krakow, Poland; Corresponding author.
E. Rząd: Łukasiewicz Research Network– Krakow Institute of Technology, 73 Zakopianska Str., 30-418, Krakow, Poland
J. Morgiel: Institute of Metallurgy and Materials Science of Polish Academy of Sciences, 25 Reymonta Str., 30-059, Krakow, Poland
A. Kirchner: Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM, Institutsteil Dresden, Winterbergstraße 28, 01277 Dresden, Germany
T. Polczyk: Łukasiewicz Research Network– Krakow Institute of Technology, 73 Zakopianska Str., 30-418, Krakow, Poland
G. Moskal: Silesian University of Technology, Faculty of Materials Engineering, Department of Advanced Materials and Technologies, 8 Krasinskiego Str., 40-019, Katowice, Poland
B. Klöden: Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM, Institutsteil Dresden, Winterbergstraße 28, 01277 Dresden, Germany
T. Weißgärber: Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM, Institutsteil Dresden, Winterbergstraße 28, 01277 Dresden, Germany
D. Toboła: Łukasiewicz Research Network– Krakow Institute of Technology, 73 Zakopianska Str., 30-418, Krakow, Poland
M. Wójcicki: Łukasiewicz Research Network– Krakow Institute of Technology, 73 Zakopianska Str., 30-418, Krakow, Poland

Journal volume & issue: Vol. 23
pp. 1753 – 1760

Abstract

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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.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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