The critical role of Monkman-Grant ductility in creep cavity nucleation

Davanas Kostas

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The critical role of Monkman-Grant ductility in creep cavity nucleation

机译：蒙克曼授予延展性在蠕变腔成核中的关键作用

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Brittle rupture during creep of materials is due to the formation and evolution of inter-granular cavities. Creep cavity nucleation rates - contrary to growth rates - are unpredictable, thus hindering forecasts about the lifespan of any material/specimen under creep. Via rigorous theoretical calculation, it is shown that creep cavity nucleation rates are linked to the Monkman-Grant ductility and that they can be quantitatively estimated through this link. Hence, a relevant phenomenological formula is verified, and creep-induced material-porosity estimations become achievable which in turn lead to improved predictions of rupture times or strains or other possible creep-porosity-related material properties like elastic moduli, thermal and electrical conductivities.

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来源
《Materials at High Temperatures》 |2021年第1期|共6页
作者
Davanas Kostas;
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作者单位

Minist Transport Civil Aviat Author St Stephen Greece;

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原文格式 PDF
正文语种 eng
中图分类工程材料学;
关键词
Grain boundary cavities; voids; pores; rupture; nucleation; creep;

机译：晶界腔;空隙;毛孔;破裂;成核;蠕变;

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The critical role of Monkman-Grant ductility in creep cavity nucleation

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