Plastic heterogeneities of a copper multicrystal deformed in uniaxial tension : Experimental study and finite element simulations

By F. Delaire, J. Raphanel, C. Rey. 2000

204 citations recorded by the source corpus.

A copper sample made of a single layer of grains is plastically deformed by uniaxial tension at room temperature and low strain rate. The deformation field is measured by means of grids deposited on the polished surface of the undeformed specimen and local orientations are recorded using electron back scattering diagrams in a scanning electron microscope. These measures are compared with simulations made by a finite element code using a physically based model for the deformation and hardening of face centered cubic crystals. A good agreement is found between measured and computed values. The simulations give access to much more detail about the history of glide in each grain and help establish which systems are active at a local level. They also provide the evolution of internal variables such as dislocation densities. A new insight into intergranular accommodation as well as intragranular heterogeneities is provided.

Subfields: Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/9782d4347c409bc3e9f7ac9f0066f80a2972995f

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Materials Chemistry

1. Dierk Raabe
2. Franz Roters
3. T. Bieler
4. Philip Eisenlohr
5. Ulrich Prahl
6. W. Bleck
7. Javier Llorca
8. E. Busso

In Mechanical Engineering

1. Dierk Raabe
2. Franz Roters
3. Philip Eisenlohr
4. T. Bieler
5. Ulrich Prahl
6. W. Bleck
7. A. Schwedt
8. A. Ramazani

Citations in the corpus

• Quantification of the effect of transformation-induced geometrically necessary dislocations on the flow-curve modelling of dual-phase steels (2013, methodology): “Delaire et al. (2000) carried out a simulation using an evolution equation of SSD density and an expression of dynamic recovery for a copper polycrystal.”
• Multiscale strain measurements of plastically deforming polycrystalline titanium: Role of deformation heterogeneities (2010, background): “Several finite element models have implemented experimental measurements of grain size and shape, and grain orientations to predict measured strain fields, see Delaire et al. (2000), Barbe et al. (2001), Raabe et al. (2001), Clayton et al. (2002), Crepin et al. (2007), and Zhao et al. (2008).”
• The role of heterogeneous deformation on damage nucleation at grain boundaries in single phase metals (2009, background): “Poly or multicrystal aluminum alloys and pure copper have been used for focused studies to characterize and model heterogeneous slip near grain boundaries (e.g. Yao and Wagoner, 1993; Delaire et al., 2000).”
• Thermo-mechanical and fracture properties in single-crystal silicon (2013, methodology): “After this point, more appropriate models, like the ones proposed by Delaire [44] or Moon et al.”
• Some elements of microstructural mechanics (2003, background): “Metallic multicrystals have been investigated both experimentally and numerically in several situations in the past 10 years: copper bicrystals [33], copper, nickel, aluminum or iron multicrystals [6,43–45].”
• Investigation of Three-Dimensional Aspects of Grain-Scale Plastic Surface Deformation of an Aluminum Oligocrystal (2008, unknown): “…years, experiments on oligocrystals, i.e. samples containing only a small set of crystals with millimeter grain size, have focused attention on the deformation-induced plastic heterogeneity of polycrystals (Delaire et al., 2000; Raabe et al., 2001; Zhang and Tong, 2004; Cheonga and Busso, 2006).”
• An analysis of (the lack of) slip transfer between near-cube oriented grains in pure Al (2019, background): “tals depends upon the local microstructure, where differences in grain orientations lead to different rates of deformation in each grain as constrained by the deformation of their neighboring grains (Delaire et al., 2000, Bieler et al., 2014). Deformation near grain boundaries mediates the strain ju”
• Sub-Grain Scale Digital Image Correlation by Electron Microscopy for Polycrystalline Materials during Elastic and Plastic Deformation (2016, background): “In several studies [6, 13, 17], grain-scale spatial resolution has been achieved in materials with mm- or cm-scale grains.”
• Discrete dislocation density modelling of single phase FCC polycrystal aggregates (2004, methodology): “Financial support from ALSTOM Power, the Department of Trade and Industry and the Engineering and Physical Research Council of the United Kingdom through Grant GR/N12312, and the provisions of the specifications and experimental data for the Cu multicrystal by Drs. F. Delaire, J. L. Raphanel and C. ”