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Influence of alloying elements (Cu, Ti, Nb) on the microstructure and corrosion behaviour of AlCrFeNi-based high entropy alloys exposed to oxygen-containing molten Pb

Shi, Hao 1; Fetzer, Renate 1; Jianu, Adrian 1; Weisenburger, Alfons 1; Heinzel, Annette 1; Lang, Fabian 1; Müller, Georg 1
1 Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):
Three high entropy alloys (HEAs), based on Al-Cr-Fe-Ni-X (X: Cu, Ti or Nb), have been designed and prepared. The sample with Cu addition has formed FCC solid solutions while the other two have formed FCC matrix plus inter-metallic phases (B2-Ni(Al,Ti) or Laves). The corrosion tests in oxygen-containing molten Pb at 600 °C indicate that Cu or Ti addition degrades the corrosion resistance of HEAs. Sample with Nb addition shows promising corrosion behaviour. Besides, all three alloys have experienced phase transformation after 1000 and 2000 h exposure. New phases like BCC, B2-NiAl, σ-phase, η-phase or-/and- Ni3Nb have been identified after exposure.

DOI: 10.1016/j.corsci.2021.109659
Zitationen: 9
Web of Science
Zitationen: 9
Zitationen: 7
Zugehörige Institution(en) am KIT Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 09.2021
Sprache Englisch
Identifikator ISSN: 0010-938X
KITopen-ID: 1000135273
HGF-Programm 32.12.01 (POF IV, LK 01) Design Basis Accidents and Materials Research
Erschienen in Corrosion science
Verlag Elsevier
Band 190
Seiten Article no: 109659
Vorab online veröffentlicht am 01.07.2021
Schlagwörter High entropy alloy, Corrosion, High temperature, Microstructure, Molten Pb
Nachgewiesen in Dimensions
Web of Science
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