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Volumn 82, Issue 13, 2010, Pages

Effects of vacancy-solute clusters on diffusivity in metastable Fe-C alloys

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EID: 78049428690     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.82.134112     Document Type: Article
Times cited : (34)

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    • Although there exist several vacancy generation mechanisms in steady-state creep, the concentration of mobile vacancies at certain external conditions (applied stress and temperature) will decrease with increasing carbon content due to the strong driving force to form large and immobile Va1 C2 complexes. These PDCs consequently lower self-diffusion and thus the vacancy binding rate to the dislocation core decreases. Therefore, the corresponding climb velocity (creep rate) is expected to decrease with increasing carbon content
    • Although there exist several vacancy generation mechanisms in steady-state creep, the concentration of mobile vacancies at certain external conditions (applied stress and temperature) will decrease with increasing carbon content due to the strong driving force to form large and immobile Va 1 C 2 complexes. These PDCs consequently lower self-diffusion and thus the vacancy binding rate to the dislocation core decreases. Therefore, the corresponding climb velocity (creep rate) is expected to decrease with increasing carbon content.


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