Dislocation debris in Ni-23.5Al-0.2B specimens deformed at 77K was dominated by superlattice intrinsic stacking faults which formed from antiphase boundary coupled dislocations. Based upon transmission electron microscopic observations, two new mechanisms were proposed for the formation of 'type I' superlattice intrinsic stacking fault dislocations. The latter faults were believed to make a significant contribution to the flow stress of 0.2at% boron doped Ni3Al at low temperatures.

Formation and Significance of Stacking Faults in Boron Doped Ni3Al Deformed at 77K. Shang, P., Jones, I.P., Smallman, R.E.: Physica Status Solidi A, 1999, 174[2], 343-52