Microscopic versus macroscopic aspect of shear bands deformation

Korbel, A.; Martin, Patrick

doi:10.1016/0001-6160(86)90249-x

Cited by 127 publications

(32 citation statements)

References 4 publications

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“…Our motivation thus most closely parallels that behind the experimental work of Korbel, Embury and coworkers [27,28,29]. Following Mahesh and Tomé [30], we hypothesize that banding is initiated stochastically from small perturbations in lattice orientation.…”

Section: Introductionsupporting

confidence: 60%

Deformation banding and shear banding in single crystals

Mahesh

2006

Acta Materialia

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A theory of rigid-plastic single crystal deformation based on the hypothesis that the crystal follows a mode of deformation that minimizes the plastic power is developed. In addition to the usual homogeneous slip modes, plastic power minimization in the present theory also extends over inhomogeneous deformation modes in the form of deformation bands or shear bands. Bands are assumed to originate from unstable perturbations of the lattice orientation. The evolution of the banded substructure with continued deformation depends on the mobility of the inter-band dislocation boundaries. The theory predicts the evolution of substructural morphology and lattice orientation with deformation. These predictions agree quantitatively with experimental observations in initially (112)

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Section: Introductionsupporting

confidence: 60%

Deformation banding and shear banding in single crystals

Mahesh

2006

Acta Materialia

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“…On the other hand, grain #1 does not reveal any heterogeneity or orientation splitting on a macroscopic scale even after the deformation to an equivalent plastic strain of 1.65. This is different from Korbel and Martin's theory 15) that shear bands generate large stress concentrations at their tips which may eventually enable them to penetrate a neighboring grain.…”

Section: Orientation Analysis By Ebsdcontrasting

confidence: 74%

Effect of Initial Grain Orientation on Evolution of Deformed Microstructure in Hot Compressed Ni-30Fe Alloy

et al. 2004

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An experimental procedure has been developed to investigate systematically the effect of initial grain orientation on the evolution of deformed microstructure in Ni-30Fe alloy. The investigation of identical grains before and after hot deformation made it possible to trace the evolution of microstructure deformed up to 50% at a strain rate of 1/s in a single pass at 1023 K using a hot compression simulator. The localized inhomogeneous shear bands occurred in almost all grains. On the other hand, the near f110gh001i grains have undergone fairly homogeneous deformation even after a high equivalent plastic strain of 1.9.

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“…All equations are numbered and referred to in the text solely by a number enclosed in a round bracket (i.e., (3) reads as "equation 3"). Ensure that any miscellaneous numbering system you use in your paper cannot be confused with a reference [4] or an equation (3) Yield strength and ultimate tensile strength were also influenced by aging times. For as received material, the yield strength and ultimate tensile strength are 660 kg and 705 kg respectively (Figure 4 (a)).…”

Section: Resultsmentioning

confidence: 99%

“…It has also been reported that the appearance of serration flow is due to the effect of deformation slip bands [3,4]. Another study on an Al-Mg alloy found that dislocation density may also influence serration behavior when specific microstructures develop during a uniaxial tensile test [4].…”

Section: Introductionmentioning

confidence: 95%

Uniaxial Loading Deformation Tests in Studying Serration Flow of Alloy C460

Mohamed¹

2013

IOSRJEN

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-The serration flow behavior of as received and heat treated aluminum-copper-lithium alloy C460 was studied at constant strain rate and at room temperature. The observed serrated flow was similar to that observed in heat treated alloy. A very characteristic feature of deformation in this alloy was the presence of precipitates and micro slips. The suggested mechanism of serrated flow maybe involves the creation of micro slips formed by shearing of the Al 2 CuLi precipitates which results in restraining of dislocations.

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Microscopic versus macroscopic aspect of shear bands deformation

Cited by 127 publications

References 4 publications

Deformation banding and shear banding in single crystals

Deformation banding and shear banding in single crystals

Effect of Initial Grain Orientation on Evolution of Deformed Microstructure in Hot Compressed Ni-30Fe Alloy

Uniaxial Loading Deformation Tests in Studying Serration Flow of Alloy C460

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