dc.contributor.author |
Nabarro, FRN
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dc.contributor.author |
Cress, CM
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dc.contributor.author |
Kotschy, P
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dc.date.accessioned |
2007-06-12T07:36:46Z |
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dc.date.available |
2007-06-12T07:36:46Z |
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dc.date.issued |
1996-08 |
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dc.identifier.citation |
Nabarro, FRN, Cress, CM and Kotschy, P. Thermodynamic driving force for rafting in superalloys. Acta materialia, vol 44 (8), pp 3189-1398 |
en |
dc.identifier.issn |
1359-6454 |
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dc.identifier.uri |
http://hdl.handle.net/10204/553
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dc.description |
Copyright: 1996 Acta Metallurgica Inc. |
en |
dc.description.abstract |
Eshelby’s energy-momentum tensor is used to provide an analytical expression for the driving force for rafting in the elastic regime in a super alloy with a high volume fraction of gamma'. The structure is modeled as a simple cubic array of gamma' cubes separated by thin sheets of gamma'. During rafting, the gamma' particles are constrained to remain tetragonal prisms. For tension along a cube axis, the driving force is proportional to the product of the tension delta, the fractional difference delta of lattice parameters of gamma' and gamma and the fractional difference m of their elastic constants C(11)- C(12). As in the calculation of Pineau for an isolated spheroid, needles are formed when this product sigma delta m is positive. Two- and three-dimensional systems behave similarly. The initial plastic strain in gamma' is anelastic and in principle reversible. When the plastic strain exceeds m delta, platelets perpendicular to the stress axis are formed if the product sigma delta is negative. |
en |
dc.language.iso |
en |
en |
dc.publisher |
Pergamon-Elsevier Science Ltd |
en |
dc.subject |
Modern superalloys |
en |
dc.subject |
Thermodynamic driving forces |
en |
dc.subject |
Plastic deformation |
en |
dc.subject |
Poisson contraction |
en |
dc.title |
Thermodynamic driving force for rafting in superalloys |
en |
dc.type |
Article |
en |
dc.identifier.apacitation |
Nabarro, F., Cress, C., & Kotschy, P. (1996). Thermodynamic driving force for rafting in superalloys. http://hdl.handle.net/10204/553 |
en_ZA |
dc.identifier.chicagocitation |
Nabarro, FRN, CM Cress, and P Kotschy "Thermodynamic driving force for rafting in superalloys." (1996) http://hdl.handle.net/10204/553 |
en_ZA |
dc.identifier.vancouvercitation |
Nabarro F, Cress C, Kotschy P. Thermodynamic driving force for rafting in superalloys. 1996; http://hdl.handle.net/10204/553. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Nabarro, FRN
AU - Cress, CM
AU - Kotschy, P
AB - Eshelby’s energy-momentum tensor is used to provide an analytical expression for the driving force for rafting in the elastic regime in a super alloy with a high volume fraction of gamma'. The structure is modeled as a simple cubic array of gamma' cubes separated by thin sheets of gamma'. During rafting, the gamma' particles are constrained to remain tetragonal prisms. For tension along a cube axis, the driving force is proportional to the product of the tension delta, the fractional difference delta of lattice parameters of gamma' and gamma and the fractional difference m of their elastic constants C(11)- C(12). As in the calculation of Pineau for an isolated spheroid, needles are formed when this product sigma delta m is positive. Two- and three-dimensional systems behave similarly. The initial plastic strain in gamma' is anelastic and in principle reversible. When the plastic strain exceeds m delta, platelets perpendicular to the stress axis are formed if the product sigma delta is negative.
DA - 1996-08
DB - ResearchSpace
DP - CSIR
KW - Modern superalloys
KW - Thermodynamic driving forces
KW - Plastic deformation
KW - Poisson contraction
LK - https://researchspace.csir.co.za
PY - 1996
SM - 1359-6454
T1 - Thermodynamic driving force for rafting in superalloys
TI - Thermodynamic driving force for rafting in superalloys
UR - http://hdl.handle.net/10204/553
ER -
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en_ZA |