Investigating sluggish diffusion in a concentrated solid solution alloy using ion irradiation with in situ TEM

Matheus A. Tunes, Hoang Le, Graeme Greaves, Cláudio G. Schön, Hongbin Bei, Yanwen Zhang, Philip D. Edmondson, Stephen E. Donnelly

Research output: Contribution to journalArticle

Abstract

Concentrated solid solution alloys (CSAs) – including high entropy alloys – are known for their remarkable mechanical and corrosion resistances with superior tolerance against the deleterious effect of irradiation exposure when compared with pure metals and dilute alloys. To date, however, the mechanisms responsible for such improvements are still unclear and remain a subject of investigation. The present work reports in situ Transmission Electron Microscopy (TEM) study under simultaneous ion irradiation of the face-centred cubic (FCC) FeCrMnNi quaternary CSA, comparing with a non-equiatomic Fe-based alloy, the AISI-348 austenitic stainless steel that has Cr, Ni and Mn as alloying elements. The alloys were irradiated under the same conditions, with 6 keV He+ and 134 keV Xe+ ions at 298 K up to 1.7 1017 ions⋅cm−2 (4 displacements-per-atom or dpa) and 2.7 1015 ions⋅cm−2 (4 dpa), respectively. The nucleation of inert gas bubbles was tracked upon post-irradiation extended annealing up to 673 K. He and Xe bubbles were observed to grow at a rate slightly slower in the CSA. Trends from the bubble size analyses show that the nucleation and growth of inert gas bubbles may be suppressed or delayed in some conditions in the CSA.
Original languageEnglish
Article number106461
Number of pages9
JournalIntermetallics
Volume110
Early online date18 Apr 2019
DOIs
Publication statusPublished - Jul 2019

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Ion bombardment
Solid solutions
Transmission electron microscopy
Noble Gases
Inert gases
Nucleation
Irradiation
Alloying elements
Austenitic stainless steel
Corrosion resistance
Entropy
Metals
Annealing
Ions
Atoms

Cite this

Tunes, Matheus A. ; Le, Hoang ; Greaves, Graeme ; Schön, Cláudio G. ; Bei, Hongbin ; Zhang, Yanwen ; Edmondson, Philip D. ; Donnelly, Stephen E. / Investigating sluggish diffusion in a concentrated solid solution alloy using ion irradiation with in situ TEM. In: Intermetallics. 2019 ; Vol. 110.
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abstract = "Concentrated solid solution alloys (CSAs) – including high entropy alloys – are known for their remarkable mechanical and corrosion resistances with superior tolerance against the deleterious effect of irradiation exposure when compared with pure metals and dilute alloys. To date, however, the mechanisms responsible for such improvements are still unclear and remain a subject of investigation. The present work reports in situ Transmission Electron Microscopy (TEM) study under simultaneous ion irradiation of the face-centred cubic (FCC) FeCrMnNi quaternary CSA, comparing with a non-equiatomic Fe-based alloy, the AISI-348 austenitic stainless steel that has Cr, Ni and Mn as alloying elements. The alloys were irradiated under the same conditions, with 6 keV He+ and 134 keV Xe+ ions at 298 K up to 1.7 1017 ions⋅cm−2 (4 displacements-per-atom or dpa) and 2.7 1015 ions⋅cm−2 (4 dpa), respectively. The nucleation of inert gas bubbles was tracked upon post-irradiation extended annealing up to 673 K. He and Xe bubbles were observed to grow at a rate slightly slower in the CSA. Trends from the bubble size analyses show that the nucleation and growth of inert gas bubbles may be suppressed or delayed in some conditions in the CSA.",
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Investigating sluggish diffusion in a concentrated solid solution alloy using ion irradiation with in situ TEM. / Tunes, Matheus A.; Le, Hoang; Greaves, Graeme; Schön, Cláudio G.; Bei, Hongbin; Zhang, Yanwen; Edmondson, Philip D.; Donnelly, Stephen E.

In: Intermetallics, Vol. 110, 106461, 07.2019.

Research output: Contribution to journalArticle

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AU - Le, Hoang

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