Modeling of grain refinement and texture evolution during equal-channel angular pressing by means of a combined visco-plastic self consistent/ disclination model

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Modeling of grain refinement and texture evolution during equal-channel angular pressing by means of a combined visco-plastic self consistent/ disclination model. / Nazarov, A. A.; Alexandrov, I. V.; Beyerlein, I. J.; Enikeev, N. A.; Orlova, T. S.; Romanov, A. E.; Valiev, R. Z.

Ultrafine Grained Materials IV. 2006. p. 215-220 (TMS Annual Meeting; Vol. 2006).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Harvard

Nazarov, AA, Alexandrov, IV, Beyerlein, IJ, Enikeev, NA, Orlova, TS, Romanov, AE & Valiev, RZ 2006, Modeling of grain refinement and texture evolution during equal-channel angular pressing by means of a combined visco-plastic self consistent/ disclination model. in Ultrafine Grained Materials IV. TMS Annual Meeting, vol. 2006, pp. 215-220, 2006 TMS Annual Meeting, San Antonio, Texas, United States, 12/03/06.

BibTeX

@inproceedings{69492b987e1b4337a849e2ee885c22e9,

title = "Modeling of grain refinement and texture evolution during equal-channel angular pressing by means of a combined visco-plastic self consistent/ disclination model",

abstract = "A disclination model for grain subdivision is incorporated into the visco-plastic self-consistent (VPSC) polycrystal model and used to simulate the grain refinement during equal-channel angular pressing (ECAP). Strain incompatibilities between a homogeneous effective medium and a probe grain calculated by VPSC are assumed to result in an accumulation of disclinations at the grain junctions. The stresses of these disclinations are then relaxed by the growth of low-angle dislocation boundaries from the junctions. These boundaries split the grain into smaller, misoriented subgrains which, with further deformation, can lead to its subdivision into new grains. The applied ECAP deformation histories are given by simple shear and an analytical fan model. The corresponding evolutions of microstructure and texture during different ECAP routes are simulated. The calculated texture and intragrain misorientations evolutions are found to be in good agreement with available experimental data.",

keywords = "Disclinations, Equal channel angular pressing, Viscoplastic self consistent model",

author = "Nazarov, {A. A.} and Alexandrov, {I. V.} and Beyerlein, {I. J.} and Enikeev, {N. A.} and Orlova, {T. S.} and Romanov, {A. E.} and Valiev, {R. Z.}",

year = "2006",

language = "English",

isbn = "0873396286",

series = "TMS Annual Meeting",

pages = "215--220",

booktitle = "Ultrafine Grained Materials IV",

note = "2006 TMS Annual Meeting ; Conference date: 12-03-2006 Through 16-03-2006",

url = "http://www.tms.org/Meetings/Annual-06/AnnMtg06Home.html",

}

RIS

TY - GEN

T1 - Modeling of grain refinement and texture evolution during equal-channel angular pressing by means of a combined visco-plastic self consistent/ disclination model

AU - Nazarov, A. A.

AU - Alexandrov, I. V.

AU - Beyerlein, I. J.

AU - Enikeev, N. A.

AU - Orlova, T. S.

AU - Romanov, A. E.

AU - Valiev, R. Z.

PY - 2006

Y1 - 2006

N2 - A disclination model for grain subdivision is incorporated into the visco-plastic self-consistent (VPSC) polycrystal model and used to simulate the grain refinement during equal-channel angular pressing (ECAP). Strain incompatibilities between a homogeneous effective medium and a probe grain calculated by VPSC are assumed to result in an accumulation of disclinations at the grain junctions. The stresses of these disclinations are then relaxed by the growth of low-angle dislocation boundaries from the junctions. These boundaries split the grain into smaller, misoriented subgrains which, with further deformation, can lead to its subdivision into new grains. The applied ECAP deformation histories are given by simple shear and an analytical fan model. The corresponding evolutions of microstructure and texture during different ECAP routes are simulated. The calculated texture and intragrain misorientations evolutions are found to be in good agreement with available experimental data.

AB - A disclination model for grain subdivision is incorporated into the visco-plastic self-consistent (VPSC) polycrystal model and used to simulate the grain refinement during equal-channel angular pressing (ECAP). Strain incompatibilities between a homogeneous effective medium and a probe grain calculated by VPSC are assumed to result in an accumulation of disclinations at the grain junctions. The stresses of these disclinations are then relaxed by the growth of low-angle dislocation boundaries from the junctions. These boundaries split the grain into smaller, misoriented subgrains which, with further deformation, can lead to its subdivision into new grains. The applied ECAP deformation histories are given by simple shear and an analytical fan model. The corresponding evolutions of microstructure and texture during different ECAP routes are simulated. The calculated texture and intragrain misorientations evolutions are found to be in good agreement with available experimental data.

KW - Disclinations

KW - Equal channel angular pressing

KW - Viscoplastic self consistent model

UR - http://www.scopus.com/inward/record.url?scp=33646499190&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:33646499190

SN - 0873396286

SN - 9780873396288

T3 - TMS Annual Meeting

SP - 215

EP - 220

BT - Ultrafine Grained Materials IV

T2 - 2006 TMS Annual Meeting

Y2 - 12 March 2006 through 16 March 2006

ER -

ID: 97616171