The HexMat team recently published a new paper - 'Local deformation mechanisms of two-phase Ti alloy'
The HexMat team recently published a new paper – ‘Local deformation mechanisms of two-phase Ti alloy’. This work presents effective experimental tools (SEM/EBSD + FIB + in-situ micropillar compression) to perform deformation tests within isolated microstructural units with precise morphologies, focussing on the role of α(hcp)/β(bcc) morphology in local deformation behaviour of dual-phase Ti alloy. The presence and morphology of the β phase can strikingly alter the apparent yielding point and work hardening response. High resolution in-situ observations of pillars particularly oriented for (apparent) single slip reveals that the morphology, even in tri-crystal samples, has a significant impact and directly affects mechanical performance. The paper including in-situ testing videos can be found at MSEA, Vol 649, 39-47, 2016 [doi:10.1016/j.msea.2015.09.016].
Engineering stress-strain curves showing significantly different σ-ε responses in three tested pillars containing same α/β crystal orientations but different β morphologies.
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Saira Naeem
Department of Mechanical Engineering
