Abstract
Abstract The factors influencing the deformation mechanisms in the intermetallic compounds Al3Ti and Al3V have been studied. As previously reported, plastic deformation of the former compound involves micro-twinning and glide of partial dislocations with Burgers vectors b given by ½〈110〉 on {001) producing ribbons of antiphase domain boundaries (APBs). In contrast, for Al3V these mechanisms are not activated and it has been determined that deformation is effected mainly by glide of dislocations with b = 〈110] on . It is proposed that this difference in behaviour is due to the relative stability of the DO22 crystal structure against the Cu3Ti-type structure (micro-twinning) and DO23 (APBs on the basal planes). It is suggested that increased ductility in these types of compounds may be realized by alloying with elements which reduce the energy difference between the DO22 and Cu3Ti-type crystal structures for these compounds.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call