The Stochastic Nature of Deformation Twinning: Application to HCP Materials

Beyerlein, Irene J.; Kumar, M. Arul

doi:10.1007/978-3-319-42913-7_103-1

Cited by 4 publications

(2 citation statements)

References 128 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In practice, the actual mode activated to accommodate plastic strain depends largely upon the orientation of the applied force relative to the lattice [12,13]. Extension twinning takes place according to the reorientation of the lattice across the {10-12}, plane extending the lattice in the [0001] direction parallel to the hexagonal c-axis normal to the basal plane [14,15]. However, twin-roll-cast Mg sheets are polycrystalline, and the manufacturing process yields a distinct basal texture.…”

Section: Introductionmentioning

confidence: 99%

“…Metals 2024, 14, 20 2 of 15 takes place according to the reorientation of the lattice across the {10-12}, plane extending the lattice in the [0001] direction parallel to the hexagonal c-axis normal to the basal plane [14,15]. However, twin-roll-cast Mg sheets are polycrystalline, and the manufacturing process yields a distinct basal texture.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

In Situ Uniaxial Compression of Textured Magnesium AZ31B

Whitmore,

Nischler,

Saage

et al. 2023

Metals

View full text Add to dashboard Cite

Strain-controlled uniaxial compression tests on textured magnesium AZ31B sheet samples were carried out using a 5 kN Kammrath & Weiss tension–compression in situ stage using a scanning electron microscope in combination with real-time electron backscatter diffraction lattice orientation mapping. The distribution of deformation twins in the samples was studied and correlated with the results of finite element simulation of the elastic strain to show that bands of twinned grains formed in areas where the principal compressive stress (σ3) was a maximum, and they formed normal to the trajectory of the principal direction of σ3. This was correlated with maps of lattice disorientation within the grains, which showed the inclination for twins to grow in alignment with local and larger-scale distributions of elastic strain. Mappings of the same area at different values of strain were made to examine the formation and growth of individual twins within the macroscopic bands of twinned grains. All the twins observed were consistent with the extension-type twin, with 86.3° disorientation with respect to the parent grain. Mappings of the grain internal disorientation were related to the elastic strain, and it was found that twin formation and growth followed the contours of the highest elastic strain within and across grains. The maximum angular disorientation found within the grains was approximately 10°, suggesting that this might correspond to a threshold of elastic strain required to initiate twinning.

show abstract