Effect of Structural Heterogeneity of 17Mn1Si Steel on the Temperature Dependence of Impact Deformation and Fracture
Abstract
:1. Introduction
2. Experimental Procedure
3. Theoretical Procedure
- The stress at the interface boundary of the i-th element and its k-th neighbor at the (n − 1)-th time step is calculated as the difference of hydrostatic pressures acting from each element of the considered pair:
- A relation analogous to the Newtonian viscous flow assuming he proportionality between the force and velocity [3] is used to calculate the average velocity of material points moving through a virtual boundary between fixed elements of space under the action of stress :
- The total relative volume change () and the mechanical energy change () of the i-th element are found as a result of its interaction with all of nearest neighbors:
4. Results and Discussion
4.1. Simulation of Impact Loading Meso-Dynamics at Different Temperatures
4.2. Fracture Micromechanisms
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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T, °C | −60 | −40 | −20 | 0 | 20 |
---|---|---|---|---|---|
KCV, J/cm2 | 9.3 ± 2 | 20 ± 3 | 46 ± 9 | 60 ± 10 | 73.3 ± 12 |
λ, % | 0.03 ± 0.005 | 0.04 ± 0.006 | 0.06 ± 0.005 | 0.09 ± 0.007 | 0.11 ± 0.006 |
Temperature, K (°C) | 213.2 (−60) | 233.2 (−40) | 253.2 (−20) | 273.2 (0) | 293.2 (20) |
---|---|---|---|---|---|
kdiss | 250 | 500 | 1000 | 2000 | 4000 |
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Moiseenko, D.; Maruschak, P.; Panin, S.; Maksimov, P.; Vlasov, I.; Berto, F.; Schmauder, S.; Vinogradov, A. Effect of Structural Heterogeneity of 17Mn1Si Steel on the Temperature Dependence of Impact Deformation and Fracture. Metals 2017, 7, 280. https://doi.org/10.3390/met7070280
Moiseenko D, Maruschak P, Panin S, Maksimov P, Vlasov I, Berto F, Schmauder S, Vinogradov A. Effect of Structural Heterogeneity of 17Mn1Si Steel on the Temperature Dependence of Impact Deformation and Fracture. Metals. 2017; 7(7):280. https://doi.org/10.3390/met7070280
Chicago/Turabian StyleMoiseenko, Dmitry, Pavlo Maruschak, Sergey Panin, Pavel Maksimov, Ilya Vlasov, Filippo Berto, Siegfried Schmauder, and Alexey Vinogradov. 2017. "Effect of Structural Heterogeneity of 17Mn1Si Steel on the Temperature Dependence of Impact Deformation and Fracture" Metals 7, no. 7: 280. https://doi.org/10.3390/met7070280