Softening mechanisms and microstructural instabilities during high temperature, low cycle fatigue of Ni, Ni(3)Al and their metal matrix composites. Progress report, June 1, 1989-May 31, 1990.

摘要

The program in the previous year has focused on the interaction of crack growth and dynamic recrystallization during high temperature low cycle fatigue (HTLCF) of nickel, the static and dynamic recrystallization behavior of boron doped Ni(sub 3)Al, computer simulation of microstructure evolution during HTLCF, and the processing of Al(sub 2)O(sub 3)/Ni(sub 3)Al(B) continuous fiber composites. The program was subdivided into 4 projects, which are summarized below.