Failure of Magnesium Sheets Under Monotonic Loading: 3D Examination of Fracture Mode and Mechanisms

Steglich, D.; Morgeneyer, Thilo F.

doi:10.1007/s10704-013-9863-y

Cited by 19 publications

(10 citation statements)

References 18 publications

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“…The presence of several crossing strained bands was clearly the origin of the zigzagging crack near the notch root. This phenomenon has been found in dierent engineering materials [52,38]. There is one damage feature indicated by an arrow that was always present on the main strained band.…”

Section: Strain Elds Closer To Notch Root (Rois 2 and 3)supporting

confidence: 52%

On deformation and damage micromechanisms in strong work hardening 2198 T3 aluminium alloy

et al. 2018

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The deformation and damage micromechanisms ahead of a notch in a large at specimen have been assessed using in situ synchrotron laminography combined with digital volume correlation for the strain evaluation in the material bulk. Despite the enhanced work hardening of the naturally aged Al-Cu-Li alloy several slanted strained bands were found from very early loading onward in the slanted fracture region. The nal slanted crack followed one of the strained bands without signicant ductile damage growth. In the high stress triaxiality region, close to the notch that underwent substantial local necking, two damage micromechanisms were observed, namely, i) limited void nucleation and growth from intermetallic particles, and ii) slanted shear cracks, even starting from the specimen surface and also located in single

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Section: Strain Elds Closer To Notch Root (Rois 2 and 3)supporting

confidence: 52%

On deformation and damage micromechanisms in strong work hardening 2198 T3 aluminium alloy

et al. 2018

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“…The void reorientation happens at late stages of loading, indicating that up to that point plasticity controls the failure process. Other, less ductile materials, such as magnesium alloys, may show slant fracture without micrometric voids at all [46]. It would be interesting to investigate numerically what the contribution of these sheared voids in a localization band to the overall strength is.…”

Section: Quantification Of Isolated Voids Evolutionmentioning

confidence: 99%

In situ laminography study of three-dimensional individual void shape evolution at crack initiation and comparison with Gurson–Tvergaard–Needleman-type simulations

2014

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“…As all tested products show a (more the less pronounced) basal texture, this effect is present in rolled and extruded products of both alloys. The absence of prismatic slip causes an early failure of the material by shear separation on inclined planes (Steglich and Morgeneyer 2013). It is worth to mention that this type of biaxial hardening cannot be described by a plasticity law based on the von Mises yield criterion.…”

Section: Discussionmentioning

confidence: 99%

Mechanical Testing of Thin Sheet Magnesium Alloys in Biaxial Tension and Uniaxial Compression

et al. 2014

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Tension and compression experiments on magnesium rolled sheets and extruded products of AZ31 (Mg + 3%Al + 1%Zn) and ZE10 (Mg + 1%Zn + 0.3%Ce based mischmetal) were performed at room temperature. The tests were conducted along the longitudinal and the transverse direction to quantify the inplane anisotropy. Samples built from adhesively-bonded layers of sheets were used for in-plane as well as through-thickness compression testing. It was verified that this simple testing method leads to identical results as using comb-like dies and equi-biaxial bulge testing, respectively. In the case of uniaxial loading, the longitudinal and transverse strain components were measured using independent extensometers. R-values were calculated from these signals. The mechanical responses were correlated to the microstructure and the texture. The recorded differences between tensile and compressive response reveal the strength differential effect of the materials. The distortional character of the plastic behaviour is evidenced through their responses to equi-biaxial tensile loading. Significant differences in the compressive responses of the two alloys were identified by comparing the respective hardening rates.

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Failure of Magnesium Sheets Under Monotonic Loading: 3D Examination of Fracture Mode and Mechanisms

Cited by 19 publications

References 18 publications

On deformation and damage micromechanisms in strong work hardening 2198 T3 aluminium alloy

On deformation and damage micromechanisms in strong work hardening 2198 T3 aluminium alloy

In situ laminography study of three-dimensional individual void shape evolution at crack initiation and comparison with Gurson–Tvergaard–Needleman-type simulations

Mechanical Testing of Thin Sheet Magnesium Alloys in Biaxial Tension and Uniaxial Compression

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