Experimental study of dislocation mobility in a Ti–6Al–4V alloy

Study of plastic deformation mechanisms in TA15 titanium alloy by combination of geometrically necessary and statistically-stored dislocations

“…5c). These results agree well with the experimental study of Ti-6Al-4V [39] and show a similar trend to the GND distributions mentioned above.…”

The Dislocation Mechanism of Stress Corrosion Embrittlement in Ti-6Al-2Sn-4Zr-6Mo

“…It is generally considered that screw dislocations control deformation in the a phase, [30,47] since edge segments are believed to move at least 100 times faster. [48] It has also been suggested that solute hydrogen can ''increase the propensity for edge character dislocations,'' [33] explaining why the frequency of occurrence of edge dislocations may have been higher in the hydrogen-embrittled grains analyzed in this study. It also follows that since edge dislocations are considered to be highly mobile, [49] their increased presence in the hydrogen-embrittled grains is consistent with the HELP mechanism and the Orowan equation.…”

In situ TEM study of dislocation slip in a metastable β titanium alloy

“…In pure bcc metals, a steady motion was observed at room temperature whereas the motion is jerky at lower temperature [11][12][13]. The steady motion is commonly attributed to a kink-pair mechanism [11,12,14] and the jerky motion to the transition between two core configurations of screw dislocations from a threedimensionally spread and sessile core structure to a glissile core structure [9,13,15,16]. The temperature of transition between these two mechanisms is below room temperature in pure bcc [11][12][13].…”

“…3 shows also the multiplication of another dislocation that is creating a dislocation loop (labelled L in Fig. 3) by a well-known mechanism due to multiple cross-slips [10,11,15]. This mechanism occurs not as extensively as in TNTZO alloy [10] leading to a slightly more homogeneous deformation (Fig.…”