On the diffusion mechanisms of fine-scale γ ′ in an advanced Ni-based superalloy

Y. Chen; E. M. Francis; M. Preuss; S. J. Haigh

doi:10.1051/matecconf/20141409002

On the diffusion mechanisms of fine-scale γ ′ in an advanced Ni-based superalloy

Y. Chen, E. M. Francis, M. Preuss, S. J. Haigh

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Other

1 Citation (Scopus)

Abstract

Size dependent compositional variations for the ordered L1 ₂-structure gamma prime (γ′) precipitates in the commercial Ni-based superalloy RR1000 have been investigated using scanning transmission electron microscope (STEM) imaging combined with energy-dispersive X-ray (EDX) spectroscopy. To address the problem of quantitative compositional determination for nanoscale particles within a metal matrix we have applied a novel electrochemical method to extract individual precipitates. The use of a high-efficiency EDX detector enabled compositional measurements to be obtained for particles with diameters as small as 20 nm with acquisition times of the order of a few minutes. We have studied compositional variations across the different size families of γ′ precipitates within a microstructure generated by slow cooling. Our results demonstrate the importance of kinetic factors for determining the precipitates compositions. In particular, we provide new evidence for the role of aluminium antisite atoms on the low-temperature growth kinetics of fine scale γ′ precipitates. Our findings provide valuable structural data towards improving the accuracy of predicting the microstructural evolution in Ni-based superalloys.

Original language	English
Title of host publication	EUROSUPERALLOYS 2014
Subtitle of host publication	2nd European Symposium on Superalloys and their Applications
Number of pages	5
Volume	14
DOIs	https://doi.org/10.1051/matecconf/20141409002
Publication status	Published - 2014
Externally published	Yes
Event	European Symposium on Superalloys and Their Applications 2014 - Giens, France Duration: 12 May 2014 → 16 May 2014 Conference number: 2nd https://www.matec-conferences.org/articles/matecconf/abs/2014/05/contents/contents.html

Publication series

Name	MATEC Web of Conferences
Publisher	EDP Sciences
ISSN (Print)	2261-236X

Conference

Conference	European Symposium on Superalloys and Their Applications 2014
Abbreviated title	EUROSUPERALLOYS 2014
Country/Territory	France
City	Giens
Period	12/05/14 → 16/05/14
Internet address	https://www.matec-conferences.org/articles/matecconf/abs/2014/05/contents/contents.html

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10.1051/matecconf/20141409002

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@inproceedings{838fbb7fa0ca4e17ad83f2b4b18796f7,

title = "On the diffusion mechanisms of fine-scale γ ′ in an advanced Ni-based superalloy",

abstract = "Size dependent compositional variations for the ordered L1 2-structure gamma prime (γ′) precipitates in the commercial Ni-based superalloy RR1000 have been investigated using scanning transmission electron microscope (STEM) imaging combined with energy-dispersive X-ray (EDX) spectroscopy. To address the problem of quantitative compositional determination for nanoscale particles within a metal matrix we have applied a novel electrochemical method to extract individual precipitates. The use of a high-efficiency EDX detector enabled compositional measurements to be obtained for particles with diameters as small as 20 nm with acquisition times of the order of a few minutes. We have studied compositional variations across the different size families of γ′ precipitates within a microstructure generated by slow cooling. Our results demonstrate the importance of kinetic factors for determining the precipitates compositions. In particular, we provide new evidence for the role of aluminium antisite atoms on the low-temperature growth kinetics of fine scale γ′ precipitates. Our findings provide valuable structural data towards improving the accuracy of predicting the microstructural evolution in Ni-based superalloys.",

author = "Y. Chen and Francis, {E. M.} and M. Preuss and Haigh, {S. J.}",

year = "2014",

doi = "10.1051/matecconf/20141409002",

language = "English",

volume = "14",

series = "MATEC Web of Conferences",

publisher = "EDP Sciences",

booktitle = "EUROSUPERALLOYS 2014",

note = "European Symposium on Superalloys and Their Applications 2014, EUROSUPERALLOYS 2014 ; Conference date: 12-05-2014 Through 16-05-2014",

url = "https://www.matec-conferences.org/articles/matecconf/abs/2014/05/contents/contents.html",

}

Chen, Y, Francis, EM, Preuss, M & Haigh, SJ 2014, On the diffusion mechanisms of fine-scale γ ′ in an advanced Ni-based superalloy. in EUROSUPERALLOYS 2014: 2nd European Symposium on Superalloys and their Applications. vol. 14, MATEC Web of Conferences, European Symposium on Superalloys and Their Applications 2014, Giens, France, 12/05/14. https://doi.org/10.1051/matecconf/20141409002

TY - GEN

T1 - On the diffusion mechanisms of fine-scale γ ′ in an advanced Ni-based superalloy

AU - Chen, Y.

AU - Francis, E. M.

AU - Preuss, M.

AU - Haigh, S. J.

N1 - Conference code: 2nd

PY - 2014

Y1 - 2014

N2 - Size dependent compositional variations for the ordered L1 2-structure gamma prime (γ′) precipitates in the commercial Ni-based superalloy RR1000 have been investigated using scanning transmission electron microscope (STEM) imaging combined with energy-dispersive X-ray (EDX) spectroscopy. To address the problem of quantitative compositional determination for nanoscale particles within a metal matrix we have applied a novel electrochemical method to extract individual precipitates. The use of a high-efficiency EDX detector enabled compositional measurements to be obtained for particles with diameters as small as 20 nm with acquisition times of the order of a few minutes. We have studied compositional variations across the different size families of γ′ precipitates within a microstructure generated by slow cooling. Our results demonstrate the importance of kinetic factors for determining the precipitates compositions. In particular, we provide new evidence for the role of aluminium antisite atoms on the low-temperature growth kinetics of fine scale γ′ precipitates. Our findings provide valuable structural data towards improving the accuracy of predicting the microstructural evolution in Ni-based superalloys.

AB - Size dependent compositional variations for the ordered L1 2-structure gamma prime (γ′) precipitates in the commercial Ni-based superalloy RR1000 have been investigated using scanning transmission electron microscope (STEM) imaging combined with energy-dispersive X-ray (EDX) spectroscopy. To address the problem of quantitative compositional determination for nanoscale particles within a metal matrix we have applied a novel electrochemical method to extract individual precipitates. The use of a high-efficiency EDX detector enabled compositional measurements to be obtained for particles with diameters as small as 20 nm with acquisition times of the order of a few minutes. We have studied compositional variations across the different size families of γ′ precipitates within a microstructure generated by slow cooling. Our results demonstrate the importance of kinetic factors for determining the precipitates compositions. In particular, we provide new evidence for the role of aluminium antisite atoms on the low-temperature growth kinetics of fine scale γ′ precipitates. Our findings provide valuable structural data towards improving the accuracy of predicting the microstructural evolution in Ni-based superalloys.

UR - http://www.scopus.com/inward/record.url?scp=84906895483&partnerID=8YFLogxK

U2 - 10.1051/matecconf/20141409002

DO - 10.1051/matecconf/20141409002

M3 - Conference Paper

AN - SCOPUS:84906895483

VL - 14

T3 - MATEC Web of Conferences

BT - EUROSUPERALLOYS 2014

T2 - European Symposium on Superalloys and Their Applications 2014

Y2 - 12 May 2014 through 16 May 2014

ER -

On the diffusion mechanisms of fine-scale γ ′ in an advanced Ni-based superalloy

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