Plastic deformation of multicrystalline thin films: Grain size distribution vs. grain orientation

Puri, Saurabh; Roy, Anish

doi:10.1016/j.commatsci.2011.03.001

Cited by 7 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerical results from a finite-element (FE) implementation of a dislocation mechanics-based plasticity theory, namely, Mesoscopic Field Dislocation Mechanics [16,17] were shown to be in a good qualitative agreement with experimental observation [18].…”

Section: Introductionmentioning

confidence: 65%

Indentation studies in b.c.c. crystals with enhanced model of strain-gradient crystal plasticity

Demiral

Roy

2013

Computational Materials Science

Self Cite

View full text Add to dashboard Cite

• This is the author's version of a work that was accepted for publication in the Computational Materials Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published at:http://www.sciencedirect.com/science/article/pii/S0927025613004072

show abstract

Section: Introductionmentioning

confidence: 65%

Indentation studies in b.c.c. crystals with enhanced model of strain-gradient crystal plasticity

Demiral

Roy

2013

Computational Materials Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…Different size effects for single crystalline materials and multicrystalline thin films have been predicted with the MFDM theory as reported in Roy and Acharya (2006), Puri et al (2009) andPuri et al (2011). Grain size distribution and crystallographic orientation effects in multicrystalline thin films were discussed in Puri and Roy (2012). The role of GND density transport in ice single-or multi-crystals was studied in Taupin et al (2007) and Richeton et al (2017).…”

mentioning

confidence: 85%

A fast Fourier transform-based mesoscale field dislocation mechanics study of grain size effects and reversible plasticity in polycrystals

Berbenni

Taupin

Lebensohn

2020

Journal of the Mechanics and Physics of Solids

View full text Add to dashboard Cite

To cite this version:Stéphane Berbenni, Vincent Taupin, Ricardo Lebensohn. A fast Fourier transform-based mesoscale field dislocation mechanics study of grain size effects and reversible plasticity in polycrystals. AbstractA numerical implementation of a non-local polycrystal plasticity theory based on a mesoscale version of the field dislocation mechanics theory (MFDM) of Acharya and Roy (2006) is presented using small-strain elasto-viscoplastic fast Fourier transformbased (EVPFFT) algorithm developed by Lebensohn et al. (2012). In addition to considering plastic flow and hardening only due to SSDs (statistically stored dislocations) as in the classic EVPFFT framework, the proposed method accounts for the evolution of GND (geometrically necessary dislocations) densities solving a hyperbolic-type partial differential equation, and GND effects on both plastic flow and hardening. This allows consideration of an enhanced strain-hardening law that includes the effect of the GND density tensor. The numerical implementation of a reduced version of the MFDM is presented in the framework of the FFT-based augmented Lagrangian procedure of Michel et al. (2001). A Finite Differences scheme combined with discrete Fourier transforms is applied to solve both incompatibility and equilibrium equations. The numerical procedure named MFDM-EVPFFT is used to perform full field simulations of polycrystal plasticity considering different grain sizes and their mechanical responses during monotonic tensile and reversible tension-compression tests. Using Voronoi tessellation and periodic boundary conditions, voxelized representative volume elements (RVEs) with different grain sizes are generated. With MFDM-EVPFFT, a Hall-Petch type scaling law is obtained in contrast with the conventional crystal plasticity EVPFFT. In the case of reversible plasticity, a stronger Bauschinger effect is observed with the MFDM-EVPFFT approach in comparison with conventional EVPFFT. The origin of these differences is analyzed in terms of heterogeneity, GND density and stress evolutions during the compression stage.

show abstract

“…Different size effects for single crystalline materials and multicrystalline thin films have been predicted with the MFDM theory as reported in Roy and Acharya (2006), Puri et al (2009) and Puri et al (2011). Grain size distribution and crystallographic orientation effects in multicrystalline thin films were discussed in Puri and Roy (2012). Using the MFDM theory, Taupin et al (2008) examined the role of GNDs on the directionality of yield stress in strain-aged steels.…”

mentioning

confidence: 95%

A FFT-based numerical implementation of mesoscale field dislocation mechanics: Application to two-phase laminates

Djaka

Berbenni

Taupin

et al. 2020

International Journal of Solids and Structures

View full text Add to dashboard Cite

Plastic deformation of multicrystalline thin films: Grain size distribution vs. grain orientation

Cited by 7 publications

References 12 publications

Indentation studies in b.c.c. crystals with enhanced model of strain-gradient crystal plasticity

Indentation studies in b.c.c. crystals with enhanced model of strain-gradient crystal plasticity

A fast Fourier transform-based mesoscale field dislocation mechanics study of grain size effects and reversible plasticity in polycrystals

A FFT-based numerical implementation of mesoscale field dislocation mechanics: Application to two-phase laminates

Contact Info

Product

Resources

About