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Journal of Materials Engineering and Performance

Erschienen in:

01.11.2012

A True-Stress Creep Model Based on Deformation Mechanisms for Polycrystalline Materials

verfasst von: Xijia Wu, Steve Williams, Diguang Gong

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 11/2012

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Abstract

A true-stress creep model has been developed based on well-recognized deformation mechanisms, i.e., dislocation glide, dislocation climb, and grain boundary sliding. The model provides a physics-based description of the entire creep deformation process with regards to the strain-time history (primary, secondary, and tertiary creep), rupture strain and lifetime, which finds good agreement with experimental observations for Waspaloy. A deformation-mechanism map is constructed for Waspaloy, and a creep failure criterion is defined by the dominant deformation mechanisms leading to intergranular/transgranular fracture. Thus, the model is a self-consistent tool for creep life prediction.

Vorheriger Artikel Predictions of the Mechanical Properties and Microstructure Evolution of High Strength Steel in Hot Stamping

Nächster Artikel Gas Pressure Profile Prediction from Variable Strain Rate Deformation Paths in AA5083 Bulge Forming

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Titel: A True-Stress Creep Model Based on Deformation Mechanisms for Polycrystalline Materials
verfasst von: Xijia Wu
Steve Williams
Diguang Gong
Publikationsdatum: 01.11.2012
Verlag: Springer US
Erschienen in: Journal of Materials Engineering and Performance / Ausgabe 11/2012
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-012-0191-6

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