INVESTIGATION OF THE EFFECTS OF ULTRASONICS ON THE DEFORMATION CHARACTERISTICS OF METALS.
Interim rept. no. 4, 1 Feb-30 Apr 64.
VIENNA UNIV (AUSTRIA)
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Results regarding the irradiation influence on hardening by irradiation prior to the static tensile test, and on the softening effects during it are described. Results are given on the influence on recovery of prehardened crystals by superimposed irradiation. The ultrasonic influence on diffusion processes is studied by means of investigations on the change of microhardness of impure metal samples during the incubation time of recrystallization, and the observation of the change in hardness, and the behavior during the static tensile test of fully annealed zinc samples. The question whether the vibration of strain or of stress is responsible for the hardening of metal crystals was examined by using samples exited to stationary ultrasonic waves. It was found that the stress antinode is also responsible for an increase of the creep rate using irradiated samples.