Impact of gamma′ particle coarsening on the critical resolved shear stress of nickel-base superalloys with low aluminium and/or titanium content
In Ni-base superalloys with low Al and/or Ti content the precipitation and subsequent coarsening of γ′ particles at intermediate temperatures contribute to the degradation of the mechanical properties of the alloy. In the present paper the coarsening process is modelled and the change of the critica...
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Published in | Journal of nuclear materials Vol. 416; no. 1; pp. 55 - 59 |
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Main Authors | , , , , |
Format | Journal Article Conference Proceeding |
Language | English |
Published |
Amsterdam
Elsevier B.V
01.09.2011
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | In Ni-base superalloys with low Al and/or Ti content the precipitation and subsequent coarsening of
γ′ particles at intermediate temperatures contribute to the degradation of the mechanical properties of the alloy. In the present paper the coarsening process is modelled and the change of the critical resolved shear stress of the alloy due to coarsening of the
γ′ particles is calculated by means of statistical analysis of the depinning of a single gliding edge dislocation. It is found that the contribution of
γ′ hardening to the critical resolved shear stress at 973
K reduces to more than half of its original value in less than one year. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0022-3115 1873-4820 |
DOI: | 10.1016/j.jnucmat.2010.11.051 |