Crystal plasticity analysis of texture development in magnesium alloy during extrusion

Mayama, Tsuyoshi; Noda, Masafumi; Chiba, Ryoichi; Kuroda, Mitsutoshi

doi:10.1016/j.ijplas.2011.02.007

Cited by 217 publications

(44 citation statements)

References 53 publications

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“…Recently, Mayama et al determined through numerical analysis the texture development mechanism active during extrusion of conventional Mg alloys. 65) Crystal plasticity analysis of equi-biaxial compression successfully reproduced the h10 10i//ED fiber texture development from an initial random texture to the final experimentally observed texture. Although they considered texture development by activation of four slip modes of basal (0001)h11 20i, prismatic f10 10gh11 20i, pyramidal-1 f10 11gh11 20i, and pyramidal-2 f11 22gh11 23i, and f10 12gh10 11i twinning, hereafter we will focus on the effects of basal (0001)h11 20i and prismatic f10 10gh11 20i slip modes only.…”

Section: Particle-stimulated Nucleationmentioning

confidence: 75%

Effect of LPSO Phase-Stimulated Texture Evolution on Creep Resistance of Extruded Mg–Zn–Gd Alloys

2013

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The creep behavior and microstructures of extruded Mg 97 Zn 1 Gd 2 alloys with long period stacking ordered (LPSO) phase have been investigated. Creep properties of extruded alloys depend on pre-extrusion aging temperature; the optimum aging temperature to obtain excellent creep resistance is between 623 and 723 K. In this temperature range, a multimodal microstructure develops during subsequent extrusion at 623 K. The ¡-Mg matrix are bimodally grained; that is, it consists of fine DRXed grains and h10 10i//ED fiber-textured coarse grains. The LPSO phase grains also develop the h10 10i//ED fiber texture. Coarse block-shaped LPSO phase promotes dynamic recrystallization in ¡-Mg matrix via particle stimulated nucleation, while both fine plate-shaped LPSO phase and solute-segregated stacking faults (SFs) stimulate h10 10i//ED fiber texture evolution in the ¡-Mg matrix. The creep strength increases with increasing area fraction of the h10 10i//ED fiber textured region (coarse ¡-Mg grains and LPSO phase grains). Formation of plate-shaped LPSO phase and/or solute-segregated SFs before extrusion is most desirable for enhancing the creep properties of extruded Mg 97 Zn 1 Gd 2 alloys, due to LPSO phase-stimulated texture evolution.

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Section: Particle-stimulated Nucleationmentioning

confidence: 75%

Effect of LPSO Phase-Stimulated Texture Evolution on Creep Resistance of Extruded Mg–Zn–Gd Alloys

2013

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“…But the symmetry of the HCP crystal structure results in stabilization of the rotation. Mayama et al [34] demonstrated how plastic spin caused by prismatic slip stabilizes at two compression directions during deformation of Mg alloys. When the compression direction is parallel to h2 1 1 0i or h1 0 1 0i, no grain rotation can occur even though prismatic slip is being activated.…”

Section: Resultsmentioning

confidence: 99%

Structure of grain boundaries with 30°[0 0 0 1] misorientation in dynamically recrystallized magnesium alloys

Liao

et al. 2015

Computational Materials Science

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“…This is in agreement with the stable orientation identified by Wagner et al in titanium [8,37] and also the observed and simulated textures in hexagonal metals where the 1123 È É 1010 component is stronger than the 1013 È É 1120 ) component. [21,38,39] C. Grain Breakup: Effect of Temperature and Loading Direction EBSD data analysis showed that increasing the temperature causes an increase in intergranular grain misorientation and that compression along the ND causes greater spread in orientations than the compression along the RD (Figure 9). This is slightly counterintuitive, as polycrystalline deformation usually becomes more homogenous as the temperature increases due to dynamic recovery.…”

Section: B the Mechanism Of Grain Breakup By Prismatic Slipmentioning

confidence: 99%

Grain Breakup During Elevated Temperature Deformation of an HCP Metal

Honniball

Preuss

Rugg

et al. 2015

Metall Mater Trans A

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A combination of mechanical testing, EBSD and crystal plasticity finite element modeling were used to investigate the influence of temperature on the fragmentation of grains in a zirconium alloy. The results demonstrate that grains of Zircaloy-4 fragment more as the temperature rises. This trend can be explained by an increasing difference between the CRSS values for hc+ai slip and hai slip as temperature rises. This change in relative slip activities with temperature is supported by experimental observations of macroscopic anisotropy and in-grain misorientation axes calculated from EBSD data, as well as plasticity modeling. By tracking the microstructural evolution during deformation, it is shown that the two major texture components fragment to different degrees under the action of prismatic slip. Grains in the 1120 fiber are significantly more stable than those in the 1010 fiber, which break up. Grains of the latter fiber fragment heterogeneously as portions of the grain rotate in opposite directions, and some do not rotate at all.

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Crystal plasticity analysis of texture development in magnesium alloy during extrusion

Cited by 217 publications

References 53 publications

Effect of LPSO Phase-Stimulated Texture Evolution on Creep Resistance of Extruded Mg–Zn–Gd Alloys

Effect of LPSO Phase-Stimulated Texture Evolution on Creep Resistance of Extruded Mg–Zn–Gd Alloys

Structure of grain boundaries with 30°[0 0 0 1] misorientation in dynamically recrystallized magnesium alloys

Grain Breakup During Elevated Temperature Deformation of an HCP Metal

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Crystal plasticity analysis of texture development in magnesium alloy during extrusion

Cited by 217 publications

References 53 publications

Effect of LPSO Phase-Stimulated Texture Evolution on Creep Resistance of Extruded Mg&ndash;Zn&ndash;Gd Alloys

Effect of LPSO Phase-Stimulated Texture Evolution on Creep Resistance of Extruded Mg&ndash;Zn&ndash;Gd Alloys

Structure of grain boundaries with 30°[0 0 0 1] misorientation in dynamically recrystallized magnesium alloys

Grain Breakup During Elevated Temperature Deformation of an HCP Metal

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Effect of LPSO Phase-Stimulated Texture Evolution on Creep Resistance of Extruded Mg–Zn–Gd Alloys

Effect of LPSO Phase-Stimulated Texture Evolution on Creep Resistance of Extruded Mg–Zn–Gd Alloys