Irradiation effects on Hasiguti peaks in gold and aluminum
Book
·
OSTI ID:4405259
From fifth international conference on internal friction and ultrasonic attenuation in crystalline solids; Aachen, Germany (27 Aug Prior to irradiation with electrons at 20 deg K, aluminum and gold samples were cold-worked (5 or 6% plastic deformation by tensile strain) at 20 deg K and annealed for one hour at 220 and 27O deg K, respectively. Gold samples were also irradiated with neutrons at 77 deg K after plastic deformation of 6% by torsion at 77 deg K, followed by annealing for one hour at 570 deg K. The annealing treatments were carried out at temperatures where the modulus defects of the samples are high and therefore the loops of dislocations are large. The Hasiguti peaks disappeared at these temperatures, which means that all the point defects also disappeared. After the irradiations Hasiguti peaks could be observed again, due to point defects caused by irradiation. This seems to confirm the validity of a model given for the Hasiguti peaks which takes into account the interaction between intrinsic point defects and dislocations, as well as the analogy between the recovery mechanism for both materials. (GE)
- Research Organization:
- Univ., Lausanne, Switzerland
- NSA Number:
- NSA-29-003104
- OSTI ID:
- 4405259
- Country of Publication:
- Germany
- Language:
- English
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