By means of in situ transmission electron microscope deformation experiments, a detailed study was made of the deformation micro-mechanisms of Ti-6Al-4V alloy at room temperature. All of the dislocations had an a-type Burgers vector, and glided mainly on prismatic or basal planes. They were first emitted from α/β interfaces and took up a preferential orientation along their screw direction. The motion of screw dislocations controlled the strain rate. These experiments permitted the microscopic parameters of plasticity for this alloy to be determined for the first time.

Experimental Study of Dislocation Mobility in a Ti-6Al-4V Alloy. P.Castany, F.Pettinari-Sturmel, J.Crestou, J.Douin, A.Coujou: Acta Materialia, 2007, 55[18], 6284-91