NEUTRON-ACOUSTIC IRRADIATION OF ALUMINUM SINGLE CRYSTALS,
Abstract
Ultrasonic irradiation of approx. 25 w/sq cm at 20 kc may increase the critical resolved shear stress by a factor of 4 in 99.999% pure aluminium single crystals. This acoustic hardening is accompanied by a yield-point phenomenon, which, in its graphical appearance, resembles effects by neutron irradiation with no sound applied. Hardening by ultrasound and by neutron irradiation are compared, and effects of the superposition of fast neutrons and intense ultrasound in aluminium single crystals having diameters between 0.6 and 1.5 mm are presented. Increases were found to amount to as much as a factor of 14 in the critical resolved shear stress of these crystals compared to untreated samples. Simultaneously, the electric resistivity increased with combined treatment by 3.2 times over untreated samples. The results from these investigations are discussed in the light of present theories of neutron and acoustic radiation damage. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 28, 1964
- Accession Number
- AD0616806
Entities
People
- B. Langenecker
- C. W. Fountain
Organizations
- Naval Air Weapons Station China Lake