Two types of basal stacking faults within <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0005.gif" overflow="scroll"><mml:mrow><mml:mo>{</mml:mo><mml:mn>10</mml:mn><mml:mover accent="true"><mml:mn>1</mml:mn><mml:mo>¯</mml:mo></mml:mover><mml:mn>2</mml:mn><mml:mo>}</mml:mo></mml:mrow></mml:math> twin in deformed magnesium alloy

Sun, Qi; Zhang, Xiyan; Shu, Yang; Tan, Li; Qing, Liu

doi:10.1016/j.matlet.2016.09.019

Cited by 21 publications

(10 citation statements)

References 17 publications

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“…It shows that average KAM in twins is still higher than that in un-twinned region for center and edge positions. Some studies have found that the lattice defects including dislocations and stacking faults in twins could be closely associated with migrations of twin boundaries [ 8 , 39 , 40 , 41 ]. Thus, twinning deformation could introduce a large number of lattice defects inside twins, which can provide more heterogeneous nucleation sites for precipitation.…”

Section: Discussionmentioning

confidence: 99%

Improving Tensile and Compressive Properties of an Extruded AZ91 Rod by the Combined Use of Torsion Deformation and Aging Treatment

et al. 2017

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In this study, AZ91 magnesium alloy rods were used to investigate the effects of torsion deformation on microstructure and subsequent aging behavior. Extruded AZ91 rod has a uniform microstructure and typical fiber texture. Torsion deformation can generate a gradient microstructure on the cross-section of the rod. After torsion, from the center to the edge in the cross-section of the rod, both stored dislocations and area fraction of {10-12} twins gradually increase, and the basal pole of the texture tends to rotate in the ED direction. Direct aging usually generates coarse discontinuous precipitates and fine continuous precipitates simultaneously. Both twin structures and dislocations via torsion deformation can be effective microstructures for the nucleation of continuous precipitates during subsequent aging. Thus, aging after torsion can promote continuous precipitation and generate gradient precipitation characteristics. Both aging treatment and torsion deformation can reduce yield asymmetry, and torsion deformation enhances the aging hardening effect by promoting continuous precipitation. Therefore, combined use of torsion deformation and aging treatment can effectively enhance the yield strength and almost eliminate the yield asymmetry of the present extruded AZ91 rod. Finally, the relevant mechanisms are discussed.

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Section: Discussionmentioning

confidence: 99%

Improving Tensile and Compressive Properties of an Extruded AZ91 Rod by the Combined Use of Torsion Deformation and Aging Treatment

et al. 2017

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“…This capability is important and urgent needed in the measurement of real local strain, which is strongly influenced by the surrounding medium and usually changes significantly when exposed in free surface. The migration of the incoherent structure is usually accompanied with the formation of non-equilibrium basal stacking faults (SFs) in newly formed {10-12}<10-11> extension twins, which have been confirmed by many researches [24,25], while few basal SFs were observed inside the corresponding matrix grains as the TEM shown. Basal SFs nucleate with one end being anchored at the moving TB while the structure of the initial TB is incoherent, resulting in the micron-width SFs and presenting a morphology with straight lines well aligned to the trace of the basal planes.…”

Section: Internal Strain Gradients In Deformed Titaniummentioning

confidence: 85%

Micromechanical behaviors related to confined deformation in pure titanium

et al. 2020

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Confined deformation, e.g. mechanical twinning, shear banding, and Lüders banding, etc. was extensively observed in metals and alloys with low stacking-fault energies, especially under complex loadings, governing the mechanical properties. It is often accompanied with gradient microstructures to accommodate the stress concentrations. Understanding the micromechanical behaviors of structural materials having confined deformation is important for evaluating the structural stabilities of engineering components. Synchrotron-based techniques provide powerful tools for multiscale microstructural characterization owing to their good resolution in real/reciprocal space, fast data collection/processing and flexible application scenarios. In this paper, the synchrotron-based high-energy X-ray diffraction (HE-XRD) and microdiffraction (μXRD) techniques in combination with traditional characterization methods are used to reveal the deformational gradient structures/stresses under different loading modes in multiscale. The structure/stress gradients induced by laser shot peening treatment and the deformation twins generated during uniaxial tensile loading in pure titanium were systematically studied by HE-XRD and μXRD, in order to elucidate the accommodating role of the deformational structures subjected to various confined scenarios. The new finding regarding the micromechanical behaviors related to confined deformation contributes to the in-depth understanding of related complex deformation behaviors.

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“…[21,22] Trojanova et al describe the importance of Al as alloying element on the stacking fault energy determined by acoustic emission. Other strong textures one can find in case of overlapping of <0001> based fiber texture plus ideal component.…”

Section: Discussionmentioning

confidence: 99%

Hot Rectangular Extrusion Textures of Six Mg‐Alloys Via Neutron Diffraction

Brokmeier

2017

Adv Eng Mater

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Due to the high quality and statistics utilizing neutron diffraction for texture analyses, the crystallographic texture variation of six Mg-alloys is described in detail (AM20-AZ31-AZ61-AZ91-ZC71-WE43). More or less in all cases, the crystallographic texture is composed of some ideal texture components such as {0001} <10-10> and {10-10} <11-20> and fiber components such as <0001> // ND and <10-10> // ED. There is a dependency of the existence and texture sharpness of texture components with alloying elements such as the amount of Al. ZC71 is special with one dominating texture component {10-10} <11-20>. WE43 shows the split of the central pole in the basal pole figure but texture components are identical to other alloys without the tilt.

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Two types of basal stacking faults within {101¯2} twin in deformed magnesium alloy

Cited by 21 publications

References 17 publications

Improving Tensile and Compressive Properties of an Extruded AZ91 Rod by the Combined Use of Torsion Deformation and Aging Treatment

Improving Tensile and Compressive Properties of an Extruded AZ91 Rod by the Combined Use of Torsion Deformation and Aging Treatment

Micromechanical behaviors related to confined deformation in pure titanium

Hot Rectangular Extrusion Textures of Six Mg‐Alloys Via Neutron Diffraction

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