THE ACTIVATION ENERGIES FOR CREEP OF SINGLE ALUMINUM CRYSTALS FAVORABLY ORIENTED FOR (111) /anti 1/ 0 1 SLIP
Journal Article
·
· Trans. Met. Soc. AIME
OSTI ID:4317517
Single aluminum crystals were subjected to creep in simple shear on the (1 1 1) planes in the slip direction. The actlvation energies for creep were calculated from the effect of small abrupt changes in temperature on the creep rate just before and immediately following the temperature change. The results definitely establish the fact that creep of single aluminum crystals occurs by three unique processes, characterized by three distinct and isolatable activation energies: The 35,500-cal-permole activation energy obtained at the highest temperatures was ascribed to a dislocation climb processs the 28,000cal-per-mole activation-energy process, occurring over the intermediate-temperature range was attributed to a cross-slip mechanisms and it was suggested that the 3400cal-per- mole process observed below 400 deg K may be the Peierls energy. (auth)
- Research Organization:
- Univ. of Califrrnia, Berkeley
- NSA Number:
- NSA-12-009262
- OSTI ID:
- 4317517
- Journal Information:
- Trans. Met. Soc. AIME, Journal Name: Trans. Met. Soc. AIME Vol. Vol: 212
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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