The effect of chromium and cobalt segregation at dislocations on nickel-based superalloys

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The effect of chromium and cobalt segregation at dislocations on nickel-based superalloys. / Kontis, Paraskevas; Li, Zhuangming; Collins, David M.; Cormier, Jonathan; Raabe, Dierk; Gault, Baptiste.

In: Scripta Materialia, Vol. 145, 01.03.2018, p. 76-80.

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Kontis, Paraskevas ; Li, Zhuangming ; Collins, David M. ; Cormier, Jonathan ; Raabe, Dierk ; Gault, Baptiste. / The effect of chromium and cobalt segregation at dislocations on nickel-based superalloys. In: Scripta Materialia. 2018 ; Vol. 145. pp. 76-80.

Bibtex

@article{1c128bcbcb7443b8a447500c785d4da6,
title = "The effect of chromium and cobalt segregation at dislocations on nickel-based superalloys",
abstract = "The segregation of solutes at dislocations in a polycrystalline and a single crystal nickel-based superalloy is studied. Our observations confirm the often assumed but yet unproven diffusion along dislocations via pipe diffusion. Direct observation and quantitative, near-atomic scale segregation of chromium and cobalt at dislocations within γ' precipitates and at interfacial dislocations leading to the partial or complete dissolution of γ' precipitates at elevated temperatures is presented. Our results allow us to elucidate the physical mechanism by which pipe diffusion initiates the undesirable dissolution of γ' precipitates.",
keywords = "Atom probe tomography, Dissolution, Pipe diffusion, Rafting, Recrystallisation",
author = "Paraskevas Kontis and Zhuangming Li and Collins, {David M.} and Jonathan Cormier and Dierk Raabe and Baptiste Gault",
year = "2018",
month = mar,
day = "1",
doi = "10.1016/j.scriptamat.2017.10.005",
language = "English",
volume = "145",
pages = "76--80",
journal = "Scripta Materialia",
issn = "1359-6462",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - The effect of chromium and cobalt segregation at dislocations on nickel-based superalloys

AU - Kontis, Paraskevas

AU - Li, Zhuangming

AU - Collins, David M.

AU - Cormier, Jonathan

AU - Raabe, Dierk

AU - Gault, Baptiste

PY - 2018/3/1

Y1 - 2018/3/1

N2 - The segregation of solutes at dislocations in a polycrystalline and a single crystal nickel-based superalloy is studied. Our observations confirm the often assumed but yet unproven diffusion along dislocations via pipe diffusion. Direct observation and quantitative, near-atomic scale segregation of chromium and cobalt at dislocations within γ' precipitates and at interfacial dislocations leading to the partial or complete dissolution of γ' precipitates at elevated temperatures is presented. Our results allow us to elucidate the physical mechanism by which pipe diffusion initiates the undesirable dissolution of γ' precipitates.

AB - The segregation of solutes at dislocations in a polycrystalline and a single crystal nickel-based superalloy is studied. Our observations confirm the often assumed but yet unproven diffusion along dislocations via pipe diffusion. Direct observation and quantitative, near-atomic scale segregation of chromium and cobalt at dislocations within γ' precipitates and at interfacial dislocations leading to the partial or complete dissolution of γ' precipitates at elevated temperatures is presented. Our results allow us to elucidate the physical mechanism by which pipe diffusion initiates the undesirable dissolution of γ' precipitates.

KW - Atom probe tomography

KW - Dissolution

KW - Pipe diffusion

KW - Rafting

KW - Recrystallisation

UR - http://www.scopus.com/inward/record.url?scp=85031775970&partnerID=8YFLogxK

U2 - 10.1016/j.scriptamat.2017.10.005

DO - 10.1016/j.scriptamat.2017.10.005

M3 - Article

AN - SCOPUS:85031775970

VL - 145

SP - 76

EP - 80

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

ER -