Affiliation: | a Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK b Department of Mechanical Engineering, The Johns Hopkins University, Baltimore, MD 21218, USA |
Abstract: | The yielding behavior of Al-rich single crystalline γ-Ti 55.5 at% Al has been measured along near 0 0 1], 0 1 0] and
orientations in both tension and compression and as function of temperature. All three orientations displayed anomalous yielding and a pronounced tension/compression asymmetry. The relative strength of the material, location of the anomalous yielding peak, and tension/compression asymmetry are all orientation dependent. A micromechanical superdislocation model addressing crystal geometry, sense of the applied load, Escaig forces and the Yoo torque is presented to explain the observed experimental results. |