INVESTIGADORES
DE VINCENTIS Natalia Soledad
artículos
Título:
Multiscale Modeling of the Strength and Ductility Paradox for High Pressure Torsion Samples with Gradient Microstructure
Autor/es:
HAMID, MEHDI; JAMALIAN, MARYAM; DE VINCENTIS, NATALIA; BUCK, QUENTIN; FIELD, DAVID
Revista:
JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME
Editorial:
ASME-AMER SOC MECHANICAL ENG
Referencias:
Año: 2021 p. 1 - 17
ISSN:
0094-4289
Resumen:
Severely plastically deformed microstructures of pure copper was produced by subjecting cylindrical copper samples to high pressure torsion. The effects of this procedure on introducing gradient microstructure and subsequent mechanical behavior were investigated by utilizing electron backscatter diffraction and performing Vickers hardness/tensile testing. A crystal plasticity-continuum dislocation dynamics modeling effort was performed to predict the mechanical performance of these samples. The model includes mechanisms based upon the gradient of dislocation density and grain size, back stress fields of grain boundaries, dislocation density transmission across grain boundaries, and stress/strain gradient effects.
