Phase field modelling of stacking fault shear in nickel base superalloys

V. A. Vorontsov; C. M. F. Rae; R. Voskoboinikov; C. Shen; Y. Wang; D. Dye

Phase field modelling of stacking fault shear in nickel base superalloys

V. A. Vorontsov, C. M. F. Rae, R. Voskoboinikov, C. Shen, Y. Wang, D. Dye

Design, Manufacturing And Engineering Management

Research output: Contribution to conference › Poster › peer-review

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Abstract

Stacking fault shear (SFS) is the dominant creep deformation mechanism in Nibase superalloys subjected to primary creep conditions (750°C, 800MPa). TEM observations1 have shown that the source of plastic strain is the shearing of they' precipitates by dislocation ribbons with overall burgers vector of a< 112 >. SFS can only occur when they matrix is sufficiently saturated with a/2 < 110> dislocations. These matrix dislocations are unable to cut the y' because of the high energy APB they leave in their wake. By combining into a ribbon, shearing of the precipitates is facilitated by formation of intrinsic and extrinsic stacking faults (SISF and SESF).

Original language	English
Number of pages	1
Publication status	Published - 17 Oct 2008
Event	Dislocations 2008: An international conference on the fundamentals of plastic deformation - Hong Kong Gold Coast Hotel, Hong Kong, Hong Kong Duration: 13 Oct 2008 → 17 Oct 2008 http://dislocations2008.stanford.edu

Conference

Conference	Dislocations 2008
Country/Territory	Hong Kong
City	Hong Kong
Period	13/10/08 → 17/10/08
Internet address	http://dislocations2008.stanford.edu

Keywords

stacking fault shear
deformation
creep conditions

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Vorontsov-etal-Dislocations-2008-Phase-field-modelling-of-stacking-fault-shearFinal published version, 713 KBLicence: CC BY-NC-SA 4.0

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title = "Phase field modelling of stacking fault shear in nickel base superalloys",

abstract = "Stacking fault shear (SFS) is the dominant creep deformation mechanism in Nibase superalloys subjected to primary creep conditions (750°C, 800MPa). TEM observations1 have shown that the source of plastic strain is the shearing of they' precipitates by dislocation ribbons with overall burgers vector of a< 112 >. SFS can only occur when they matrix is sufficiently saturated with a/2 < 110> dislocations. These matrix dislocations are unable to cut the y' because of the high energy APB they leave in their wake. By combining into a ribbon, shearing of the precipitates is facilitated by formation of intrinsic and extrinsic stacking faults (SISF and SESF).",

keywords = "stacking fault shear, deformation, creep conditions",

author = "Vorontsov, {V. A.} and Rae, {C. M. F.} and R. Voskoboinikov and C. Shen and Y. Wang and D. Dye",

year = "2008",

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day = "17",

language = "English",

note = "Dislocations 2008 : An international conference on the fundamentals of plastic deformation ; Conference date: 13-10-2008 Through 17-10-2008",

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TY - CONF

T1 - Phase field modelling of stacking fault shear in nickel base superalloys

AU - Vorontsov, V. A.

AU - Rae, C. M. F.

AU - Voskoboinikov, R.

AU - Shen, C.

AU - Wang, Y.

AU - Dye, D.

PY - 2008/10/17

Y1 - 2008/10/17

N2 - Stacking fault shear (SFS) is the dominant creep deformation mechanism in Nibase superalloys subjected to primary creep conditions (750°C, 800MPa). TEM observations1 have shown that the source of plastic strain is the shearing of they' precipitates by dislocation ribbons with overall burgers vector of a< 112 >. SFS can only occur when they matrix is sufficiently saturated with a/2 < 110> dislocations. These matrix dislocations are unable to cut the y' because of the high energy APB they leave in their wake. By combining into a ribbon, shearing of the precipitates is facilitated by formation of intrinsic and extrinsic stacking faults (SISF and SESF).

AB - Stacking fault shear (SFS) is the dominant creep deformation mechanism in Nibase superalloys subjected to primary creep conditions (750°C, 800MPa). TEM observations1 have shown that the source of plastic strain is the shearing of they' precipitates by dislocation ribbons with overall burgers vector of a< 112 >. SFS can only occur when they matrix is sufficiently saturated with a/2 < 110> dislocations. These matrix dislocations are unable to cut the y' because of the high energy APB they leave in their wake. By combining into a ribbon, shearing of the precipitates is facilitated by formation of intrinsic and extrinsic stacking faults (SISF and SESF).

KW - stacking fault shear

KW - deformation

KW - creep conditions

M3 - Poster

T2 - Dislocations 2008

Y2 - 13 October 2008 through 17 October 2008

ER -

Phase field modelling of stacking fault shear in nickel base superalloys

Abstract

Conference

Keywords

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