Plastic Deformations in L10-Ordered Single Crystals with their c/a Ratios Less than Unity
Compressive deformation of L10-ordered single crystals of FePd whose c/a ratio less than unity have been investigated from room temperature to 823 K. The results show that the critical resolved shear stress (CRSS) for octahedral glide of ordinary dislocations is smaller than that of super-lattice dislocations in all the temperature range investigated, that is the opposite sense to the case of Ti-56 mol% Al. The CRSS for ordinary dislocations virtually independent to the temperature. On the other hand, the CRSS for super dislocations exhibits a weak positive temperature dependence from room temperature up to 573 K and decreases in higher temperatures.
Young Won Chang, Nack J. Kim and Chong Soo Lee
K. Tanaka et al., "Plastic Deformations in L10-Ordered Single Crystals with their c/a Ratios Less than Unity", Materials Science Forum, Vols. 561-565, pp. 459-462, 2007