Atomistic Simulations of Cross-Slip Processes in Model FCC Structures and $ L1_{0} $ TiAl
Abstract Three dimensional (3D) cross-slipped core structures of a/2[110] screw dislocations in model FCC structures are simulated using lattice statics within the Embedded Atom Method (EAM) formalism using potentials fitted to the elastic and structural properties of FCC Ni as well as $ L1_{0} $TiA...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Rao, S. [verfasserIn] |
|---|
| Format: |
E-Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
1998 |
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| Übergeordnetes Werk: |
Enthalten in: MRS online proceedings library - Warrendale, Pa. : MRS, 1998, 538(1998), 1 vom: Dez., Seite 77-85 |
|---|---|
| Übergeordnetes Werk: |
volume:538 ; year:1998 ; number:1 ; month:12 ; pages:77-85 |
| Links: |
|---|
| DOI / URN: |
10.1557/PROC-538-77 |
|---|
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SPR041727282 |
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| 520 | |a Abstract Three dimensional (3D) cross-slipped core structures of a/2[110] screw dislocations in model FCC structures are simulated using lattice statics within the Embedded Atom Method (EAM) formalism using potentials fitted to the elastic and structural properties of FCC Ni as well as $ L1_{0} $TiAl. 2 and 3-D Green’s function (GF) techniques are used to relax the boundary forces in the simulations. The core structure of the constrictions are diffuse. At large separation distances between Shockley partials in the unconstricted configuration, the two constrictions formed by cross-slip onto a cross {111} plane have significantly different energy profiles suggesting that self-stress forces dominate the energetics of the cross-slip process. The variation in cross-slip energy with stacking-fault energy is in reasonable agreement with continuum predictions, excepting at high fault energy values as in $ L1_{0} $TiAl. Cross-slip energies estimated for Cu, Ni and γ-TiAl from these calculations show reasonable agreement with experimental data. The cross-slip energy shows a significantly weaker dependence on Escaig stress as compared to elasticity calculations, with the activation volume for the cross-slip process being approximately $ 20b^{3} $ at an applied Escaig stress of $ 10^{-3} $μ in Cu. | ||
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10.1557/PROC-538-77 doi (DE-627)SPR041727282 (SPR)PROC-538-77-e DE-627 ger DE-627 rakwb eng 670 ASE Rao, S. verfasserin aut Atomistic Simulations of Cross-Slip Processes in Model FCC Structures and $ L1_{0} $ TiAl 1998 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Three dimensional (3D) cross-slipped core structures of a/2[110] screw dislocations in model FCC structures are simulated using lattice statics within the Embedded Atom Method (EAM) formalism using potentials fitted to the elastic and structural properties of FCC Ni as well as $ L1_{0} $TiAl. 2 and 3-D Green’s function (GF) techniques are used to relax the boundary forces in the simulations. The core structure of the constrictions are diffuse. At large separation distances between Shockley partials in the unconstricted configuration, the two constrictions formed by cross-slip onto a cross {111} plane have significantly different energy profiles suggesting that self-stress forces dominate the energetics of the cross-slip process. The variation in cross-slip energy with stacking-fault energy is in reasonable agreement with continuum predictions, excepting at high fault energy values as in $ L1_{0} $TiAl. Cross-slip energies estimated for Cu, Ni and γ-TiAl from these calculations show reasonable agreement with experimental data. The cross-slip energy shows a significantly weaker dependence on Escaig stress as compared to elasticity calculations, with the activation volume for the cross-slip process being approximately $ 20b^{3} $ at an applied Escaig stress of $ 10^{-3} $μ in Cu. Enthalten in MRS online proceedings library Warrendale, Pa. : MRS, 1998 538(1998), 1 vom: Dez., Seite 77-85 (DE-627)57782046X (DE-600)2451008-7 1946-4274 nnns volume:538 year:1998 number:1 month:12 pages:77-85 https://dx.doi.org/10.1557/PROC-538-77 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_2005 AR 538 1998 1 12 77-85 |
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10.1557/PROC-538-77 doi (DE-627)SPR041727282 (SPR)PROC-538-77-e DE-627 ger DE-627 rakwb eng 670 ASE Rao, S. verfasserin aut Atomistic Simulations of Cross-Slip Processes in Model FCC Structures and $ L1_{0} $ TiAl 1998 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Three dimensional (3D) cross-slipped core structures of a/2[110] screw dislocations in model FCC structures are simulated using lattice statics within the Embedded Atom Method (EAM) formalism using potentials fitted to the elastic and structural properties of FCC Ni as well as $ L1_{0} $TiAl. 2 and 3-D Green’s function (GF) techniques are used to relax the boundary forces in the simulations. The core structure of the constrictions are diffuse. At large separation distances between Shockley partials in the unconstricted configuration, the two constrictions formed by cross-slip onto a cross {111} plane have significantly different energy profiles suggesting that self-stress forces dominate the energetics of the cross-slip process. The variation in cross-slip energy with stacking-fault energy is in reasonable agreement with continuum predictions, excepting at high fault energy values as in $ L1_{0} $TiAl. Cross-slip energies estimated for Cu, Ni and γ-TiAl from these calculations show reasonable agreement with experimental data. The cross-slip energy shows a significantly weaker dependence on Escaig stress as compared to elasticity calculations, with the activation volume for the cross-slip process being approximately $ 20b^{3} $ at an applied Escaig stress of $ 10^{-3} $μ in Cu. Enthalten in MRS online proceedings library Warrendale, Pa. : MRS, 1998 538(1998), 1 vom: Dez., Seite 77-85 (DE-627)57782046X (DE-600)2451008-7 1946-4274 nnns volume:538 year:1998 number:1 month:12 pages:77-85 https://dx.doi.org/10.1557/PROC-538-77 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_2005 AR 538 1998 1 12 77-85 |
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10.1557/PROC-538-77 doi (DE-627)SPR041727282 (SPR)PROC-538-77-e DE-627 ger DE-627 rakwb eng 670 ASE Rao, S. verfasserin aut Atomistic Simulations of Cross-Slip Processes in Model FCC Structures and $ L1_{0} $ TiAl 1998 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Three dimensional (3D) cross-slipped core structures of a/2[110] screw dislocations in model FCC structures are simulated using lattice statics within the Embedded Atom Method (EAM) formalism using potentials fitted to the elastic and structural properties of FCC Ni as well as $ L1_{0} $TiAl. 2 and 3-D Green’s function (GF) techniques are used to relax the boundary forces in the simulations. The core structure of the constrictions are diffuse. At large separation distances between Shockley partials in the unconstricted configuration, the two constrictions formed by cross-slip onto a cross {111} plane have significantly different energy profiles suggesting that self-stress forces dominate the energetics of the cross-slip process. The variation in cross-slip energy with stacking-fault energy is in reasonable agreement with continuum predictions, excepting at high fault energy values as in $ L1_{0} $TiAl. Cross-slip energies estimated for Cu, Ni and γ-TiAl from these calculations show reasonable agreement with experimental data. The cross-slip energy shows a significantly weaker dependence on Escaig stress as compared to elasticity calculations, with the activation volume for the cross-slip process being approximately $ 20b^{3} $ at an applied Escaig stress of $ 10^{-3} $μ in Cu. Enthalten in MRS online proceedings library Warrendale, Pa. : MRS, 1998 538(1998), 1 vom: Dez., Seite 77-85 (DE-627)57782046X (DE-600)2451008-7 1946-4274 nnns volume:538 year:1998 number:1 month:12 pages:77-85 https://dx.doi.org/10.1557/PROC-538-77 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_2005 AR 538 1998 1 12 77-85 |
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10.1557/PROC-538-77 doi (DE-627)SPR041727282 (SPR)PROC-538-77-e DE-627 ger DE-627 rakwb eng 670 ASE Rao, S. verfasserin aut Atomistic Simulations of Cross-Slip Processes in Model FCC Structures and $ L1_{0} $ TiAl 1998 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Three dimensional (3D) cross-slipped core structures of a/2[110] screw dislocations in model FCC structures are simulated using lattice statics within the Embedded Atom Method (EAM) formalism using potentials fitted to the elastic and structural properties of FCC Ni as well as $ L1_{0} $TiAl. 2 and 3-D Green’s function (GF) techniques are used to relax the boundary forces in the simulations. The core structure of the constrictions are diffuse. At large separation distances between Shockley partials in the unconstricted configuration, the two constrictions formed by cross-slip onto a cross {111} plane have significantly different energy profiles suggesting that self-stress forces dominate the energetics of the cross-slip process. The variation in cross-slip energy with stacking-fault energy is in reasonable agreement with continuum predictions, excepting at high fault energy values as in $ L1_{0} $TiAl. Cross-slip energies estimated for Cu, Ni and γ-TiAl from these calculations show reasonable agreement with experimental data. The cross-slip energy shows a significantly weaker dependence on Escaig stress as compared to elasticity calculations, with the activation volume for the cross-slip process being approximately $ 20b^{3} $ at an applied Escaig stress of $ 10^{-3} $μ in Cu. Enthalten in MRS online proceedings library Warrendale, Pa. : MRS, 1998 538(1998), 1 vom: Dez., Seite 77-85 (DE-627)57782046X (DE-600)2451008-7 1946-4274 nnns volume:538 year:1998 number:1 month:12 pages:77-85 https://dx.doi.org/10.1557/PROC-538-77 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_2005 AR 538 1998 1 12 77-85 |
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10.1557/PROC-538-77 doi (DE-627)SPR041727282 (SPR)PROC-538-77-e DE-627 ger DE-627 rakwb eng 670 ASE Rao, S. verfasserin aut Atomistic Simulations of Cross-Slip Processes in Model FCC Structures and $ L1_{0} $ TiAl 1998 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Three dimensional (3D) cross-slipped core structures of a/2[110] screw dislocations in model FCC structures are simulated using lattice statics within the Embedded Atom Method (EAM) formalism using potentials fitted to the elastic and structural properties of FCC Ni as well as $ L1_{0} $TiAl. 2 and 3-D Green’s function (GF) techniques are used to relax the boundary forces in the simulations. The core structure of the constrictions are diffuse. At large separation distances between Shockley partials in the unconstricted configuration, the two constrictions formed by cross-slip onto a cross {111} plane have significantly different energy profiles suggesting that self-stress forces dominate the energetics of the cross-slip process. The variation in cross-slip energy with stacking-fault energy is in reasonable agreement with continuum predictions, excepting at high fault energy values as in $ L1_{0} $TiAl. Cross-slip energies estimated for Cu, Ni and γ-TiAl from these calculations show reasonable agreement with experimental data. The cross-slip energy shows a significantly weaker dependence on Escaig stress as compared to elasticity calculations, with the activation volume for the cross-slip process being approximately $ 20b^{3} $ at an applied Escaig stress of $ 10^{-3} $μ in Cu. Enthalten in MRS online proceedings library Warrendale, Pa. : MRS, 1998 538(1998), 1 vom: Dez., Seite 77-85 (DE-627)57782046X (DE-600)2451008-7 1946-4274 nnns volume:538 year:1998 number:1 month:12 pages:77-85 https://dx.doi.org/10.1557/PROC-538-77 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_2005 AR 538 1998 1 12 77-85 |
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Atomistic Simulations of Cross-Slip Processes in Model FCC Structures and $ L1_{0} $ TiAl |
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Abstract Three dimensional (3D) cross-slipped core structures of a/2[110] screw dislocations in model FCC structures are simulated using lattice statics within the Embedded Atom Method (EAM) formalism using potentials fitted to the elastic and structural properties of FCC Ni as well as $ L1_{0} $TiAl. 2 and 3-D Green’s function (GF) techniques are used to relax the boundary forces in the simulations. The core structure of the constrictions are diffuse. At large separation distances between Shockley partials in the unconstricted configuration, the two constrictions formed by cross-slip onto a cross {111} plane have significantly different energy profiles suggesting that self-stress forces dominate the energetics of the cross-slip process. The variation in cross-slip energy with stacking-fault energy is in reasonable agreement with continuum predictions, excepting at high fault energy values as in $ L1_{0} $TiAl. Cross-slip energies estimated for Cu, Ni and γ-TiAl from these calculations show reasonable agreement with experimental data. The cross-slip energy shows a significantly weaker dependence on Escaig stress as compared to elasticity calculations, with the activation volume for the cross-slip process being approximately $ 20b^{3} $ at an applied Escaig stress of $ 10^{-3} $μ in Cu. |
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Abstract Three dimensional (3D) cross-slipped core structures of a/2[110] screw dislocations in model FCC structures are simulated using lattice statics within the Embedded Atom Method (EAM) formalism using potentials fitted to the elastic and structural properties of FCC Ni as well as $ L1_{0} $TiAl. 2 and 3-D Green’s function (GF) techniques are used to relax the boundary forces in the simulations. The core structure of the constrictions are diffuse. At large separation distances between Shockley partials in the unconstricted configuration, the two constrictions formed by cross-slip onto a cross {111} plane have significantly different energy profiles suggesting that self-stress forces dominate the energetics of the cross-slip process. The variation in cross-slip energy with stacking-fault energy is in reasonable agreement with continuum predictions, excepting at high fault energy values as in $ L1_{0} $TiAl. Cross-slip energies estimated for Cu, Ni and γ-TiAl from these calculations show reasonable agreement with experimental data. The cross-slip energy shows a significantly weaker dependence on Escaig stress as compared to elasticity calculations, with the activation volume for the cross-slip process being approximately $ 20b^{3} $ at an applied Escaig stress of $ 10^{-3} $μ in Cu. |
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Abstract Three dimensional (3D) cross-slipped core structures of a/2[110] screw dislocations in model FCC structures are simulated using lattice statics within the Embedded Atom Method (EAM) formalism using potentials fitted to the elastic and structural properties of FCC Ni as well as $ L1_{0} $TiAl. 2 and 3-D Green’s function (GF) techniques are used to relax the boundary forces in the simulations. The core structure of the constrictions are diffuse. At large separation distances between Shockley partials in the unconstricted configuration, the two constrictions formed by cross-slip onto a cross {111} plane have significantly different energy profiles suggesting that self-stress forces dominate the energetics of the cross-slip process. The variation in cross-slip energy with stacking-fault energy is in reasonable agreement with continuum predictions, excepting at high fault energy values as in $ L1_{0} $TiAl. Cross-slip energies estimated for Cu, Ni and γ-TiAl from these calculations show reasonable agreement with experimental data. The cross-slip energy shows a significantly weaker dependence on Escaig stress as compared to elasticity calculations, with the activation volume for the cross-slip process being approximately $ 20b^{3} $ at an applied Escaig stress of $ 10^{-3} $μ in Cu. |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">SPR041727282</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20220112052625.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">201102s1998 xx |||||o 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1557/PROC-538-77</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)SPR041727282</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(SPR)PROC-538-77-e</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">670</subfield><subfield code="q">ASE</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Rao, S.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Atomistic Simulations of Cross-Slip Processes in Model FCC Structures and $ L1_{0} $ TiAl</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1998</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Three dimensional (3D) cross-slipped core structures of a/2[110] screw dislocations in model FCC structures are simulated using lattice statics within the Embedded Atom Method (EAM) formalism using potentials fitted to the elastic and structural properties of FCC Ni as well as $ L1_{0} $TiAl. 2 and 3-D Green’s function (GF) techniques are used to relax the boundary forces in the simulations. The core structure of the constrictions are diffuse. At large separation distances between Shockley partials in the unconstricted configuration, the two constrictions formed by cross-slip onto a cross {111} plane have significantly different energy profiles suggesting that self-stress forces dominate the energetics of the cross-slip process. The variation in cross-slip energy with stacking-fault energy is in reasonable agreement with continuum predictions, excepting at high fault energy values as in $ L1_{0} $TiAl. Cross-slip energies estimated for Cu, Ni and γ-TiAl from these calculations show reasonable agreement with experimental data. The cross-slip energy shows a significantly weaker dependence on Escaig stress as compared to elasticity calculations, with the activation volume for the cross-slip process being approximately $ 20b^{3} $ at an applied Escaig stress of $ 10^{-3} $μ in Cu.</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">MRS online proceedings library</subfield><subfield code="d">Warrendale, Pa. : MRS, 1998</subfield><subfield code="g">538(1998), 1 vom: Dez., Seite 77-85</subfield><subfield code="w">(DE-627)57782046X</subfield><subfield code="w">(DE-600)2451008-7</subfield><subfield code="x">1946-4274</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:538</subfield><subfield code="g">year:1998</subfield><subfield code="g">number:1</subfield><subfield code="g">month:12</subfield><subfield code="g">pages:77-85</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://dx.doi.org/10.1557/PROC-538-77</subfield><subfield code="z">lizenzpflichtig</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_SPRINGER</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2005</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">538</subfield><subfield code="j">1998</subfield><subfield code="e">1</subfield><subfield code="c">12</subfield><subfield code="h">77-85</subfield></datafield></record></collection>
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