Technical progress report, March 1, 1991--December 12, 1991

During this period work was focussed on three major topics: (1) developing electropotential drop techniques to monitor the growth of part-through cracks; (2) developing combined micromechanical and finite element crack tip field models for failure assessment for ferritic and martensitic steels; (3) analysis and assessment of radiation-induced degradation of the mechanical properties of austenitic stainless steels pertinent to near term fusion machines. These activities are part of a broad effort to characterize failure criteria of austenitic and ferritic steels anticipated for use in fusion reactor structures