[SY-E7] Dislocation density-based crystal plasticity analysis for the evolution of atomic vacancies during plastic slip deformation
Density evolution of atomic vacancies during plastic slip deformation is evaluated by crystal plasticity analyses where evolution of dislocation density is calculated by the model of Kocks and Mecking1 and the dislocation mean free path is given by an effective average distance of forest dislocations and a microstructure length scale2, 3. We slightly modified the model by Essmann and Mughrabi4 for the evolution of atomic vacancy density and implemented to the crystal plasticity software code.
Analysis results5 show that the vacancy density sometimes reaches at the order of 1024 /m3, which is at the order of 10-4 in terms of concentration. Increase rate of the atomic vacancy is shown to depend largely on the microstructure length scale and slip multiplication on different systems.
Reference
1. Mecking H, Kocks U f.; Acta Metall. 1981;29:1865-1875.
2. Ohashi T. Dislocation Density-Based Modeling of Crystal Plasticity Finite Element Analysis. In: Mechanics of Materials. Micromechanics. Springer Nature Singapore; 2018.
3. Ohashi T, Kawamukai M, Zbib H.; Int J Plast. 2007;23(5):897-914.
4. Essmann U, Mughrabi H.; Philos Mag A. 1979;40(6):731-756.
5. Ohashi T.; submitted.
Analysis results5 show that the vacancy density sometimes reaches at the order of 1024 /m3, which is at the order of 10-4 in terms of concentration. Increase rate of the atomic vacancy is shown to depend largely on the microstructure length scale and slip multiplication on different systems.
Reference
1. Mecking H, Kocks U f.; Acta Metall. 1981;29:1865-1875.
2. Ohashi T. Dislocation Density-Based Modeling of Crystal Plasticity Finite Element Analysis. In: Mechanics of Materials. Micromechanics. Springer Nature Singapore; 2018.
3. Ohashi T, Kawamukai M, Zbib H.; Int J Plast. 2007;23(5):897-914.
4. Essmann U, Mughrabi H.; Philos Mag A. 1979;40(6):731-756.
5. Ohashi T.; submitted.