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Deformation twinning is described by the twinning plane and a twinning direction. Atoms move in the twinning direction by a displacement, generating twinning shear. The twin's structure is a mirror image of the parent structure about the twinning plane.
The present article is concerned only with deformation twinning and covers the following topics: (i) formation of twins in high-symmetry structures; (ii) influence of material variables on twinning; (iii) accommodation of deformation twins and their role in crack nucleation; and (iv) emerging new techniques for studying deformation twinning.
Deformation When a fully grown crystal undergoes mechanical stress (such as pressure), the crystal lattice may be distorted. One can imagine this by laying the shell of a matchbox on a table and applying slight pressure to it.
1 paź 2023 · Deformation twinning is an important plastic carrier competing with the ordinary dislocation slip in a broad class of crystalline solids, which critically controls the mechanical properties, plasticity, and fracture of crystalline materials across different length scales.
6 kwi 2016 · Due to the scarcity of “easy slip” systems in hexagonal materials with a hexagonal closepacked structure (hcp), deformation twinning plays a crucial role in determining mechanical properties and texture evolution.
24 sty 2019 · HRTEM image of the deformed AZ31 alloy containing a {10 \ (\overline {1}\) 2} twin (a) and enlarged views of the areas enclosed by the box B (b) and box C (c). (e, f) are FFT patterns of (b, c...
3 maj 2019 · Fundamental aspects of deformation twinning are addressed in Sect. 9.1 in the context of a three-term kinematic decomposition of the deformation gradient. Discussion highlights differences among mechanisms of twinning, dislocation glide, and thermoelastic deformations.
