Identification of active slip systems in polycrystals by Slip Trace - Modified Lattice Rotation Analysis (ST-MLRA)

Yang, Bingchu; Shi, Chenying; Lai, Ruilin; Shi, Dongfeng; Guan, Dawei; Zhu, Gaoming; Cui, Yujie; Xie, Guoqiang; Li, Yunping; Chiba, Ayano; Llorca, Javier

doi:10.1016/j.scriptamat.2022.114648

Cited by 18 publications

(1 citation statement)

References 27 publications

(33 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There may be situations that the directions of multiple slip traces were close to that in the SEM image. In that case, Schmid factor (SF) was taken as the criterion for the selection of the active slip mode, i.e., the one with largest SF value was taken as the active slip system [34,35]. Similarly, since the three slip systems of basal slips were located in the same plane, the one with the highest SF was chosen as the active slip system.…”

Section: Slip Activity During In-situ Tensionmentioning

confidence: 99%

In-Situ Study on the Tensile Deformation and Fracture Mechanism of a Bimodal-Structured Mg-Gd-Y Alloy

Ning,

Gao,

Zhou

et al. 2023

Materials

View full text Add to dashboard Cite

The as-extruded (EX) Mg-Gd-Y alloy studied here exhibited a bimodal structure, composed of fine dynamic recrystallized (DRXed) grains with random orientations and longitudinal coarse hot-worked grains. The slip analysis showed the DRXed grains exhibited mainly basal slips, while the hot-worked grains exhibited mainly prismatic slips during the tensile deformation. The distribution of geometrically necessary dislocations (GNDs) showed that there was strain partitioning between the fine and coarse grain regions. The hetero-deformation induced (HDI) hardening occurred between the two domains. It improves the strength and strain hardening capability of the alloy, leading to good strength-ductility synergy. Microcracks tended to nucleate at the DRXed grain boundaries, as well as at the interface between the two domains. The calculation of geometric compatibility parameter (m’) indicated that strain incompatibility between the adjacent grains induced the crack nucleation. The toughening effect of the fine DRXed grains hindered the crack propagation. However, the major crack formed at the interface between the two domains propagated unstably, due to the high stress concentration and the large crack size, causing the final failure.

show abstract

Section: Slip Activity During In-situ Tensionmentioning

confidence: 99%