An experimental study on grain deformation and interactions in an Al-0.5%Mg multicrystal

Zhang, Nian; Tong, Wei

doi:10.1016/s0749-6419(03)00100-1

Cited by 103 publications

(61 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The concept of the voronoi polygon has been used extensively in material science, especially for modelling random microstructure of grain aggregates [16]. Zhang and Tong [17] presented the numerical computation of 3D as a general investigation tool that featured an aggregate computation including element type and geometrical representation of grain boundary. Based on voronoi tessellation, lognormal and gamma distribution were used to describe the distribution of grain size in polycrystalline by Zhu et al [18] and Dalla et al [19].…”

Section: Introductionmentioning

confidence: 99%

Modelling of size effects in microforming process with consideration of grained heterogeneity

Wei

Jiang

et al. 2013

Computational Materials Science

View full text Add to dashboard Cite

Size effect is a special phenomenon in metal micro-forming process. As the deformation process is scale down to micro/mesoscale, the characteristics of single grain involved in the deformed region play a significant role on the material mechanical behaviours resulting in the invalidation of classical theories in microforming. This paper presents a newly developed material model in microscale on the basis of the grained heterogeneity (e.g. grain size, shape and deformability) and specimen dimension. Voronoi tessellation has been employed to describe the polycrystalline aggregate. The grain shape is controlled by the centroidal-voronoi algorithm to drive grains into steady state. Hardness of the grains obtained from Nano-indentation is used to identify the scatter of the grained deformability. Applying the new material model, the micro-compression test of pure copper is numerically simulated by finite element method (FEM). The influences of grain size and feature size on the deformation behaviours are discussed. The numerical simulation results are in good agreement with the experimental results in terms of the flow stress curves and profile of deformed parts. Based on the novel material model, a FE model of microcross wedge rolling is established and the obtained results show the strain of specimen core region increases with the magnification of grain size. © 2013 Elsevier B.V. All rights reserved. AbstractSize effect is a special phenomenon in metal micro-forming process. As the deformation process is scale down to micro/meso scale, the characteristics of single grain involved in the deformed region play a significant role on the material mechanical behaviours resulting in the invalidation of classical theories in microforming. This paper presents a newly developed material model in micro scale on the basis of the grained heterogeneity (e.g. grain size, shape and deformability) and specimen dimension. Voronoi tessellation has been employed to describe the polycrystalline aggregate. The grain shape is controlled by the centroidal-voronoi algorithm to drive grains into steady state. Hardness of the grains obtained from Nano-indentation is used to identify the scatter of the grained deformability. Applying the new material model, the micro-compression test of pure copper is numerically simulated by finite element method (FEM). The influences of grain size and feature size on the deformation behaviours are discussed. The numerical simulation results are in good agreement with the experimental results in terms of the flow stress curves and profile of deformed parts. Based on the novel material model, a FE model of micro cross wedge rolling is established and the obtained results show the strain of specimen core region increases with the magnification of grain size.

show abstract

Section: Introductionmentioning

confidence: 99%

Modelling of size effects in microforming process with consideration of grained heterogeneity

Wei

Jiang

et al. 2013

Computational Materials Science

View full text Add to dashboard Cite

show abstract

“…An exhaustive literature exists on heterogeneous deformation in single-phase metals and alloys [1][2][3][4][5][6][7][8][9][10][11]. Such studies are mostly concerned with differences in the extent of deformation, and the corresponding differences in microstructural developments.…”

mentioning

confidence: 99%

“…An exhaustive range of the published literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14] exists on this subject. Typically in single-phase polycrystalline metals, differences in strain are observed between different grains and also inside the same grain.…”

mentioning

confidence: 99%

Heterogeneous Deformation in Single‐Phase Zircaloy 2

Sahoo

Hiwarkar

Samajdar

et al. 2008

Ceramic Transactions Series

View full text Add to dashboard Cite

“…For a given grain structure, UV exposure on the grain boundaries was for 1 hr, 10 hr, and 50 hr. Knowledge of the local properties, and the assumption that the UV irradiation is uniform throughout the material, addressed the issues raised in the introduction regarding the combined use of DIC and EBSD techniques in previous studies (Zhang and Tong, 2004;Matin et. al., 2006;St-Pierre et.…”

Section: Discussionmentioning

confidence: 99%

Crack Path Selection in Microstructurally Tailored Inhomogeneous Polymers

Gonzalez

Lambros

2012

Exp Mech

View full text Add to dashboard Cite

In this work, the wide range of properties of a photodegradable polymer are exploited to generate a host of different inhomogeneous arrangements that can help us experimentally study crack path selection problems. The model material which we are using is a polyethylene copolymer, ECO, whose photosensitive behavior allows alterations in its mechanical properties when subjected to ultraviolet (UV) irradiation. It is seen that ECO becomes stiffer but more

show abstract

An experimental study on grain deformation and interactions in an Al-0.5%Mg multicrystal

Cited by 103 publications

References 45 publications

Modelling of size effects in microforming process with consideration of grained heterogeneity

Modelling of size effects in microforming process with consideration of grained heterogeneity

Heterogeneous Deformation in Single‐Phase Zircaloy 2

Crack Path Selection in Microstructurally Tailored Inhomogeneous Polymers

Contact Info

Product

Resources

About