Slip Systems and Solid Solution Softening/Hardening in BCC Metals

摘要

Solid solution softening phenomenon is re-examined with special attention to intrinsic/extrinsic mechanism controversy. It appears that the existence of intrinsic solid solution softening is gaining support in many bcc metals. The existence, however, is still questioned in Nb and Ta. In this report the recent observations supporting the intrinsic mechanism in Nb are reviewed. Solid solution hardening is observed in cases where the solvent metal deforms extensively by the coplanar double slip mode and softening in those which deform primarily by the single slip mode. 3 figures. (ERA citation 06:033504)