Multiscale Modeling of the Strength and Ductility Paradox for High-Pressure Torsion Samples With Gradient Microstructure

Autor:	Natalia De Vincentis, David P. Field, Maryam Jamalian, Mehdi Hamid, Quentin Buck
Rok vydání:	2021
Předmět:	Materials science Mechanical Engineering Torsion (mechanics) Plasticity Condensed Matter Physics Microstructure Multiscale modeling Grain size Stress (mechanics) Condensed Matter::Materials Science Mechanics of Materials High pressure General Materials Science Composite material Ductility
Zdroj:	Journal of Engineering Materials and Technology. 144
ISSN:	1528-8889 0094-4289
DOI:	10.1115/1.4051901
Popis:	Severely plastically deformed microstructures of pure copper were 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 on 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::309a1ff91f50e5b49c7ec70f4915849e https://doi.org/10.1115/1.4051901 Zobrazit plný text záznamu