On the onset of necking instability in tempered martensitic 9% Cr steels
| Autor: | B.K. Choudhary, J. Christopher |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Mean free path Mechanical Engineering 02 engineering and technology Work hardening Plasticity 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Instability Density based Mechanics of Materials Martensite 0103 physical sciences General Materials Science Dislocation Composite material 0210 nano-technology Civil and Structural Engineering Necking |
| Zdroj: | Mechanics Research Communications. 94:114-119 |
| ISSN: | 0093-6413 |
| Popis: | Considere criterion accounting for necking instability has been examined in terms of dislocation density based approach for tempered martensitic 9% Cr steels. The critical dislocation density as well as the critical strain at which instability sets-in has been predicted from the dislocation dynamics approach. The parameters associated with the approach such as mean free path of dislocations and dynamic recovery have been the key for developing microstructural based necking instability criterion. The interrelationship between true uniform plastic strain and dynamic recovery parameter has been established from the present formulation for tempered martensitic 9% Cr steels. The increase in dynamic recovery with decreasing mean free path and increasing temperature strongly influences the work hardening ability of tempered martensitic 9% Cr steels. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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