Interaction between Phases in Co-deforming Two-Phase Materials: The Role of Dislocation Arrangements

Bolmaro, R.E.; Brokmeier, Heinz Günter; Signorelli, Javier; Fourty, A.L.; Bertinetti, M. A.

doi:10.1007/978-3-662-06723-9_15

Cited by 7 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The schematic picture of subgrain or cell structure where dislocations constitute the boundaries of subgrains or cells with slightly different orientations. The figure is similar in its meaning to the schematic illustration in Figure 15.6 of Bolmaro et al ͑2004͒.…”

Section: Discussionmentioning

confidence: 89%

Correlation between subgrains and coherently scattering domains

et al. 2005

View full text Add to dashboard Cite

Crystallite size determined by X-ray line profile analysis is often smaller than the grain or subgrain size obtained by transmission electron microscopy, especially when the material has been produced by plastic deformation. It is shown that besides differences in orientation between grains or subgrains, dipolar dislocation walls without differences in orientation also break down coherency of X-rays scattering. This means that the coherently scattering domain size provided by X-ray line profile analysis provides subgrain or cell size bounded by dislocation boundaries or dipolar walls.

show abstract

Section: Discussionmentioning

confidence: 89%

Correlation between subgrains and coherently scattering domains

et al. 2005

View full text Add to dashboard Cite

show abstract

“…[69,80,81,128]. The arrangement of dislocations into small angle grain boundaries provide a simple and straightforward model for subgrain/cell structure where the TEM grain size is obviously larger than the X-ray subgrain/cell size, as shown schematically in [129] and [83]. The thorough Fig.…”

Section: The Interpretation Of Coherently Scattering Domains As Subgrmentioning

confidence: 99%

Nanocrystalline materials studied by powder diffraction line profile analysis

Ungár¹,

Gubicza²

2007

Zeitschrift Für Kristallographie - Crystalline Materials

View full text Add to dashboard Cite

Abstract. X-ray powder diffraction is a powerful tool for characterising the microstructure of crystalline materials in terms of size and strain. It is widely applied for nanocrystalline materials, especially since other methods, in particular electron microscopy is, on the one hand tedious and time consuming, on the other hand, due to the often metastable states of nanomaterials it might change their microstructures. It is attempted to overview the applications of microstructure characterization by powder diffraction on nanocrystalline metals, alloys, ceramics and carbon base materials. Whenever opportunity is given, the data provided by the X-ray method are compared and discussed together with results of electron microscopy. Since the topic is vast we do not try to cover the entire field.

show abstract

“…We have calculated in a previous paper such misorientations simply by enforcing co-spin between closest neighbours and compared the results with Mika and Dawson FEM results [26] and experiments [5,27]. The results are already discussed in Bolmaro et al [2], and some other applications of the co-spin scheme have been made to simulate texture development in single phase [28] and two-phase materials [29,30], few grains in a medium range deformation regime [30,31] and input data for recrystallization simulations [32,33]. They have all been successful in proving the capabilities of the co-spin model to simulate textures, fragmentation, misorientations, strain sharing, etc.…”

Section: Micromechanical Modelmentioning

confidence: 91%

Development of wire drawing textures in Cu–Fe: the influence of macroscopic and microscopic heterogeneities

Bolmaro

Fourty

Signorelli

et al. 2005

Modelling Simul. Mater. Sci. Eng.

View full text Add to dashboard Cite

The current paper presents a comparison of the influence over texture development of different heterogeneity levels of deformation. A viscoplastic self-consistent (VPSC) micromechanical model is coupled with a finite element method (FEM) to simulate wire drawing texture development in a two-phase Cu–Fe material. VPSC models are capable of simulating grain-to-grain heterogeneity, and FEM models can accomplish the task of simulating the macroscopic variation of velocity gradient due to geometrical constraints during wire drawing. Intra-grain heterogeneities are empirically built in the VPSC model by enforcing a common spin between closest neighbour grains. The results are contrasted and validated by neutron diffraction experimental textures. Different levels of heterogeneity are simulated, and the results are assessed and compared against Taylor based simulations. The ‘curling’ problem is also addressed by allowing the grains to interact through the co-spin model and the ellipsoid axes orientations to evolve independently.

show abstract

Interaction between Phases in Co-deforming Two-Phase Materials: The Role of Dislocation Arrangements

Cited by 7 publications

References 25 publications

Correlation between subgrains and coherently scattering domains

Correlation between subgrains and coherently scattering domains

Nanocrystalline materials studied by powder diffraction line profile analysis

Development of wire drawing textures in Cu–Fe: the influence of macroscopic and microscopic heterogeneities

Contact Info

Product

Resources

About