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Coupled effects of α2 orientation and slip misorientation on deformation of Ti2AlNb alloy
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DOI：10.1016/j.scriptamat.2026.117531.png)
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Abstract
En 中文
Plastic deformation is affected by intrinsic slip anisotropy in the α2 phase and slip-transfer capability across α2/β interfaces in Ti2AlNb alloys. Orientation-controlled micropillar compression is used to decouple these contributions, and slip misorientation serves as a quantitative measure of interface compatibility. In intragranular α2 pillars with small slip misorientation, pronounced orientation dependence is observed. The <10 1¯0> orientation promotes early multi-slip and strong hardening, <0001> shows weak hardening due to limited dislocation storage and surface escape, whereas <11 2¯0> yields at low stress with marked stress drops indicative of avalanche-like plasticity. When slip misorientation is large, interfacial slip transfer is suppressed, leading to slip termination and delayed α2 activation. These results show that intrinsic α2 orientation, together with slip misorientation, affects plastic deformation in Ti2AlNb.
Keywords:
α2 phase
Ti2AlNb alloy
In-situ micropillar compression
slip misorientation
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5.6
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1.6W
Citations:
5.1W
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