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

Mehdi Hamid; Maryam Jamalian; Natalia De Vincentis; Quentin Buck; DAVID P FIELD

doi:10.1115/1.4051901

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

Journal article

Peer reviewed

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

Mehdi Hamid, Maryam Jamalian, Natalia De Vincentis, Quentin Buck and DAVID P FIELD

Journal of engineering materials and technology, Vol.144(1)

01/01/2022

DOI: https://doi.org/10.1115/1.4051901

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Multiscale Modeling of the Strength and Ductility Paradox for High-Pressure Torsion Samples with Gradient Microstructures

Abstract

materials processing

strain gradient plasticity

grain boundaries

microstructure property relationships

plastic behavior

dislocation theory

stress gradient plasticity

micromechanical modeling

mechanical behavior

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.

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Title: Multiscale Modeling of the Strength and Ductility Paradox for High-Pressure Torsion Samples With Gradient Microstructure
Creators: Mehdi Hamid - School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164
Maryam Jamalian - School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164
Natalia De Vincentis - Instituto de Física Rosario, FCEIA-UNR-CONICET, Bv. 27 de Febrero 210 bis, S2000EZP Rosario, Argentina
Quentin Buck - School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164
DAVID P FIELD
Publication Details: Journal of engineering materials and technology, Vol.144(1)
Academic Unit: Mechanical and Materials Engineering, School of
Publisher: ASME
Identifiers: 99900632330401842
Language: English
Resource Type: Journal article