Effect of microstructure on the nucleation of deformation twins in polycrystalline high-purity magnesium: A multi-scale modeling study

Beyerlein, Irene J.; McCabe, Rodney J.; Tomé, Carlos N.

doi:10.1016/j.jmps.2011.02.007

Cited by 301 publications

(177 citation statements)

References 35 publications

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“…compression and tension deformation twins [16][17][18]. Compression and tension deformation twins are understood to be the primary mechanisms for c-axis compression/shorting and tension/elongation on bulk samples.…”

Section: Resultsmentioning

confidence: 99%

Response of Ti microstructure in mechanical and laser forming processes

et al. 2018

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Microstructural deformation mechanisms present during three different forming processes in commercially pure Ti were analysed. Room temperature mechanical forming, laser beam forming and a combination of these two processes were applied to thick metal plates in order to achieve the same final shape. An electron backscatter diffraction technique was used to study the plate microstructure before and after applying the forming processes. Substantial differences among the main deformation mechanisms were clearly detected. In pure mechanical forming at room temperature, mechanical twinning predominates in both compression and tensile areas. A dislocation slip mechanism inside the compression and tensile area is characteristic of the pure laser forming process. Forming processes which subsequently combine the laser and mechanical approaches result in a combination of twinning and dislocation mechanisms. The Schmid factor at an individual grain level, the local temperature and the strain rate are factors that determine which deformation mechanism will prevail at the microscopic level. The final microstructures obtained after the different forming processes were applied are discussed from the point of view of their influence on the performance of the resulting formed product. The observations suggest that phase transformation in Ti is an additional microstructural factor that has to be considered during laser forming.

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Section: Resultsmentioning

confidence: 99%

Response of Ti microstructure in mechanical and laser forming processes

et al. 2018

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“…The pole figure for a pure copper polycrystalline after ECAP Figure 1 (a) shows a pole figure obtained using the proposed rotation model, and Fig. 1 (b) shows the same data of the field experiment given in [3]. A similar nature of irregularities in the obtained pole figures can be clearly traced.…”

Section: -3mentioning

confidence: 55%

“…At the same time, material model construction approaches at the junction of nonlinear solid mechanics and solidstate physics have developed intensively in recent decades, these models being generally referred to as crystal plasticity theories [1][2][3]. General structure and classification of relations of constitutive models with internal variables can be found, for example, in [4].…”

Section: Introductionmentioning

confidence: 99%

Description of grain lattice rotation and fragmentation mechanisms using crystal plasticity

Volegov¹,

Telkanov²

2016

AIP Conference Proceedings

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Abstract. The goal is to construct a physically based, mathematically correct multilevel model of intensive inelastic deformation of mono-and polycrystalline taking into account the evolution of the orientation of structural elements, rotations of crystal lattices of crystallites, allowing one to obtain the physical and mechanical properties of the sample at the macro level. The general structure of the multilevel models of inelastic deformation of materials, including the description of the evolution of the internal structure, is considered. A model of crystallite lattice rotations that takes into account the incompatibility of slip dislocations in neighboring grains is proposed. The results of numerical experiments for ECAP agree well with the experimental data.

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“…Statistical analyses show Fe-30Mn-3Si-2Al-0.11C steel has an average grain size of ~30 μm. The subsequently EBSD observations were conducted on RD × TD plane of the initial-state sample, providing crystal orientations, grain size distribution, and confirmed that the sample has fine-grained structure as shown in Figure 2a To efficiently determine the position of twin lamellae, it is established that twin lamellae is often originated from a statistical distribution of defects in the grain boundaries [35,36]. Particularly the grain boundary misorientation angle exhibits a significant influence on the probability of twin nucleation.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 83%

“…In addition, it is observed that, for the uniaxial tensile loading condition, mostly twin lamellae in the FCC-type phase were originated in the HAGBs above 25 • . To efficiently determine the position of twin lamellae, it is established that twin lamellae is often originated from a statistical distribution of defects in the grain boundaries [35,36]. Particularly the grain boundary misorientation angle exhibits a significant influence on the probability of twin nucleation.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Misorientation-Dependent Twinning Induced Hardening and Texture Evolution of TWIP Steel Sheet in Plastic Deformation Process

Guo

Sun

et al. 2017

Metals

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Abstract:The quantitative contribution of twinning to hardening behavior and its effect on crystal orientation need to be explored in greater depth for design and forming of twinning-induced-plasticity (TWIP) steel products. To address this issue, the characteristics of twinning formation in the plastic deformation of Fe-30Mn-3Si-2Al TWIP steel are investigated in terms of intergranular misorientation distribution using electron back-scattering diffraction (EBSD), which reveals that most deformation twins adhere to the high-angle grain boundaries (HAGBs) of the face-center-cube (FCC) type TWIP steel. Texture measurements are conducted to show a stable volume fraction of major components including Goss, S and A orientations, while Copper shifts towards Brass orientation. A crystal plasticity finite element (CPFE) model based on virtual polycrystalline microstructure adopting representative volume element (RVE) is employed to simulate the deformation to reveal the correlation between misorientation-dependent twinning and hardening behavior of TWIP steel. The results demonstrate that the proportion of twinning hardening to overall hardening is larger than slip hardening. The stability of texture evolution is simulated to predict the anisotropy of TWIP steel. This research substantiates the twinning induced hardening and texture evolution in deformation of TWIP steel and thus is essential for accurate prediction of the mechanical behaviors.

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Effect of microstructure on the nucleation of deformation twins in polycrystalline high-purity magnesium: A multi-scale modeling study

Cited by 301 publications

References 35 publications

Response of Ti microstructure in mechanical and laser forming processes

Response of Ti microstructure in mechanical and laser forming processes

Description of grain lattice rotation and fragmentation mechanisms using crystal plasticity

Misorientation-Dependent Twinning Induced Hardening and Texture Evolution of TWIP Steel Sheet in Plastic Deformation Process

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