Nanoindentation and nano-compression testing of Ni3Al precipitates

B. Gan, Hideyuki Murakami, R. Maaß, L. Meza, J. R. Greer, T. Ohmura, S. Tin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Using an AFM-based instrumented nanoindentation system, the nanoindentation response of γ′ particles (Ni3Al) in a Ni-base single crystal superalloy CMSX-4 was characterized to demonstrate the influence of the softer γ matrix on the measurement of nano-mechanical properties of γ′ particles. The properties of the γ′ particles were measured after both a standard and a coarsening heat treatment, in which the initially sub-micron sized cuboidal γ′ particles transformed to large, irregularly shaped γ′ precipitates with dimensions in excess of 30 urn. The measured nano-hardness of the coarsened γ′ precipitates in CMSX-4 appears to increase slightly with the increasing load. Nano-compression testing of cuboidal γ′ particles, electrolytically extracted from a CMSX-4 after a standard solution and age heat treatment, was also performed. With a maximum value of 10 GPa, the measured yield stress of these dislocation-free γ′ particles approaches the ideal strength and is equivalent to -G/17. Compared to the measured yield strengths of γ′ phase in its bulk crystal form, these nano-compression results are more than a factor of 33 higher. Additionally, the 'softening' effect of Ga+ ion implantation on the strength of dislocation-free nanocrystals was also assessed. The resulting yield strengths of cuboidal γ′ precipitates imaged with a focused ion beam were at least 5 GPa lower than those that had not been subjected to Ga+ ion implantation.

Original languageEnglish
Title of host publicationSuperalloys 2012 - Proceedings of the 12th International Symposium on Superalloys
Pages83-91
Number of pages9
Publication statusPublished - 2012 Dec 1
Externally publishedYes
Event12th International Symposium on Superalloys, Superalloys 2012 - Seven Springs, PA, United States
Duration: 2012 Sep 92012 Sep 13

Other

Other12th International Symposium on Superalloys, Superalloys 2012
CountryUnited States
CitySeven Springs, PA
Period12/9/912/9/13

Fingerprint

Compression testing
Nanoindentation
nanoindentation
Yield stress
Precipitates
precipitates
Ion implantation
Heat treatment
Nanohardness
Focused ion beams
Coarsening
yield strength
Dislocations (crystals)
Superalloys
Nanocrystals
ion implantation
Compaction
heat treatment
Single crystals
Mechanical properties

Keywords

  • γ′ precipitate
  • Nano-compression
  • Nanoindentation
  • Superalloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Gan, B., Murakami, H., Maaß, R., Meza, L., Greer, J. R., Ohmura, T., & Tin, S. (2012). Nanoindentation and nano-compression testing of Ni3Al precipitates. In Superalloys 2012 - Proceedings of the 12th International Symposium on Superalloys (pp. 83-91)

Nanoindentation and nano-compression testing of Ni3Al precipitates. / Gan, B.; Murakami, Hideyuki; Maaß, R.; Meza, L.; Greer, J. R.; Ohmura, T.; Tin, S.

Superalloys 2012 - Proceedings of the 12th International Symposium on Superalloys. 2012. p. 83-91.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Gan, B, Murakami, H, Maaß, R, Meza, L, Greer, JR, Ohmura, T & Tin, S 2012, Nanoindentation and nano-compression testing of Ni3Al precipitates. in Superalloys 2012 - Proceedings of the 12th International Symposium on Superalloys. pp. 83-91, 12th International Symposium on Superalloys, Superalloys 2012, Seven Springs, PA, United States, 12/9/9.
Gan B, Murakami H, Maaß R, Meza L, Greer JR, Ohmura T et al. Nanoindentation and nano-compression testing of Ni3Al precipitates. In Superalloys 2012 - Proceedings of the 12th International Symposium on Superalloys. 2012. p. 83-91
Gan, B. ; Murakami, Hideyuki ; Maaß, R. ; Meza, L. ; Greer, J. R. ; Ohmura, T. ; Tin, S. / Nanoindentation and nano-compression testing of Ni3Al precipitates. Superalloys 2012 - Proceedings of the 12th International Symposium on Superalloys. 2012. pp. 83-91
@inproceedings{72aded67ca074f10be7fee1a2905815f,
title = "Nanoindentation and nano-compression testing of Ni3Al precipitates",
abstract = "Using an AFM-based instrumented nanoindentation system, the nanoindentation response of γ′ particles (Ni3Al) in a Ni-base single crystal superalloy CMSX-4 was characterized to demonstrate the influence of the softer γ matrix on the measurement of nano-mechanical properties of γ′ particles. The properties of the γ′ particles were measured after both a standard and a coarsening heat treatment, in which the initially sub-micron sized cuboidal γ′ particles transformed to large, irregularly shaped γ′ precipitates with dimensions in excess of 30 urn. The measured nano-hardness of the coarsened γ′ precipitates in CMSX-4 appears to increase slightly with the increasing load. Nano-compression testing of cuboidal γ′ particles, electrolytically extracted from a CMSX-4 after a standard solution and age heat treatment, was also performed. With a maximum value of 10 GPa, the measured yield stress of these dislocation-free γ′ particles approaches the ideal strength and is equivalent to -G/17. Compared to the measured yield strengths of γ′ phase in its bulk crystal form, these nano-compression results are more than a factor of 33 higher. Additionally, the 'softening' effect of Ga+ ion implantation on the strength of dislocation-free nanocrystals was also assessed. The resulting yield strengths of cuboidal γ′ precipitates imaged with a focused ion beam were at least 5 GPa lower than those that had not been subjected to Ga+ ion implantation.",
keywords = "γ′ precipitate, Nano-compression, Nanoindentation, Superalloy",
author = "B. Gan and Hideyuki Murakami and R. Maa{\ss} and L. Meza and Greer, {J. R.} and T. Ohmura and S. Tin",
year = "2012",
month = "12",
day = "1",
language = "English",
isbn = "9780470943205",
pages = "83--91",
booktitle = "Superalloys 2012 - Proceedings of the 12th International Symposium on Superalloys",

}

TY - GEN

T1 - Nanoindentation and nano-compression testing of Ni3Al precipitates

AU - Gan, B.

AU - Murakami, Hideyuki

AU - Maaß, R.

AU - Meza, L.

AU - Greer, J. R.

AU - Ohmura, T.

AU - Tin, S.

PY - 2012/12/1

Y1 - 2012/12/1

N2 - Using an AFM-based instrumented nanoindentation system, the nanoindentation response of γ′ particles (Ni3Al) in a Ni-base single crystal superalloy CMSX-4 was characterized to demonstrate the influence of the softer γ matrix on the measurement of nano-mechanical properties of γ′ particles. The properties of the γ′ particles were measured after both a standard and a coarsening heat treatment, in which the initially sub-micron sized cuboidal γ′ particles transformed to large, irregularly shaped γ′ precipitates with dimensions in excess of 30 urn. The measured nano-hardness of the coarsened γ′ precipitates in CMSX-4 appears to increase slightly with the increasing load. Nano-compression testing of cuboidal γ′ particles, electrolytically extracted from a CMSX-4 after a standard solution and age heat treatment, was also performed. With a maximum value of 10 GPa, the measured yield stress of these dislocation-free γ′ particles approaches the ideal strength and is equivalent to -G/17. Compared to the measured yield strengths of γ′ phase in its bulk crystal form, these nano-compression results are more than a factor of 33 higher. Additionally, the 'softening' effect of Ga+ ion implantation on the strength of dislocation-free nanocrystals was also assessed. The resulting yield strengths of cuboidal γ′ precipitates imaged with a focused ion beam were at least 5 GPa lower than those that had not been subjected to Ga+ ion implantation.

AB - Using an AFM-based instrumented nanoindentation system, the nanoindentation response of γ′ particles (Ni3Al) in a Ni-base single crystal superalloy CMSX-4 was characterized to demonstrate the influence of the softer γ matrix on the measurement of nano-mechanical properties of γ′ particles. The properties of the γ′ particles were measured after both a standard and a coarsening heat treatment, in which the initially sub-micron sized cuboidal γ′ particles transformed to large, irregularly shaped γ′ precipitates with dimensions in excess of 30 urn. The measured nano-hardness of the coarsened γ′ precipitates in CMSX-4 appears to increase slightly with the increasing load. Nano-compression testing of cuboidal γ′ particles, electrolytically extracted from a CMSX-4 after a standard solution and age heat treatment, was also performed. With a maximum value of 10 GPa, the measured yield stress of these dislocation-free γ′ particles approaches the ideal strength and is equivalent to -G/17. Compared to the measured yield strengths of γ′ phase in its bulk crystal form, these nano-compression results are more than a factor of 33 higher. Additionally, the 'softening' effect of Ga+ ion implantation on the strength of dislocation-free nanocrystals was also assessed. The resulting yield strengths of cuboidal γ′ precipitates imaged with a focused ion beam were at least 5 GPa lower than those that had not been subjected to Ga+ ion implantation.

KW - γ′ precipitate

KW - Nano-compression

KW - Nanoindentation

KW - Superalloy

UR - http://www.scopus.com/inward/record.url?scp=84885932481&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84885932481&partnerID=8YFLogxK

M3 - Conference contribution

SN - 9780470943205

SP - 83

EP - 91

BT - Superalloys 2012 - Proceedings of the 12th International Symposium on Superalloys

ER -