Deformation responses of AZ31B magnesium alloy under combined shear-compression loading

Lin, Hui; Li, Lin; Shao, Lidong; Jin, Tao

doi:10.1080/02670836.2022.2110716

Cited by 2 publications

(2 citation statements)

References 29 publications

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Section: Resultssupporting

confidence: 79%

“…Figure 18b shows the typical distribution of a smaller population of precipitates, consistent with an earlier study [34]. Further studies on dislocation slip and deformation twinning in magnesium alloys can be found to add context to these investigations and give an indication of the direction of research in this field [53][54][55][56]. Figure 18 shows TEM bright field images of other features observed during investigation that are evidence of the high levels of strain taking place in the lattice.…”

Section: Resultssupporting

confidence: 77%

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In Situ Pure Shear Tests on Textured Magnesium AZ31B Sheets

Whitmore,

Nischler,

Saage

et al. 2024

Metals

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Pure shear tests of textured magnesium AZ31B sheet samples were carried out using a 5 kN Kammrath & Weiss in situ tension-compression stage in a scanning electron microscope in combination with real-time electron backscatter diffraction lattice orientation mapping. The sample design was optimized to produce a pure shear stress in the central gauge zone. Distributions of the deformation twins were correlated with finite element simulations using a linear-elastic constitutive law considering large deformations to show that twins form in areas where the principal compressive stress σ3* is a maximum and that they form normal to the trajectories of that minor principal stress. Mappings of the same area at different load values revealed the formation and growth of individual twins and their relationship to the internal elastic strain of individual grains as indicated by the internal grain disorientation. All twins observed were of the extension type, with an 86.3° disorientation with respect to the parent grains. A more detailed study was conducted using transmission electron microscopy to correlate with the EBSD observations and to further elucidate the twin structures within samples.

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Section: Resultssupporting

confidence: 79%

Section: Resultssupporting

confidence: 77%

In Situ Pure Shear Tests on Textured Magnesium AZ31B Sheets

Whitmore,

Nischler,

Saage

et al. 2024

Metals

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Tension anisotropy of rolled AA7075-T6 auminium alloy: Experiments, BP-Neural network modeling and orientation dependent failure mechanisms

Lv,

Lee,

Lin

et al. 2024

mat express

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This paper presents the investigations on anisotropic tension mechanical responses of AA7075-T6 based on experiments, classical strength theory, BP-neural network modeling and fracture morphology characterization. Results show that the tension strength anisotropy weakens with deformation degree. Compared to the traditional method, the machine learning model exhibits more flexible in solving the anisotropic plastic responses of AA7075-T6 auminium alloy sheet and provides more accurate predictions. Through analyzing the fracture surface of tension specimen at various orientations, the failure mechanism is sensitive to orientation. Specifically, the irregular distribution of dimples zones and cleavage steps can be observed at lower material orientation. As the orientation increases, the alternative occurrence of ductile and brittle features dominates the failure mechanism. The medium-size dimple caused by coalescence of small-size dimples represents a transition between ductile features zone and brittle characteristics region.

show abstract

Deformation responses of AZ31B magnesium alloy under combined shear-compression loading

Cited by 2 publications

References 29 publications

In Situ Pure Shear Tests on Textured Magnesium AZ31B Sheets

In Situ Pure Shear Tests on Textured Magnesium AZ31B Sheets

Tension anisotropy of rolled AA7075-T6 auminium alloy: Experiments, BP-Neural network modeling and orientation dependent failure mechanisms

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