Microstructure and tensile properties of heavily irradiated 5052-0 aluminum alloy
During neutron irradiation of an aluminum 2.2% magnesium solid solution alloy in the High Flux Isotope Reactor to fast and thermal fluences > 10/sup 27/ neutrons (n)m/sup 2/ at 328/sup 0/K (0.35 T/sub m/) about seven percent insoluble, transmutant silicon was produced. Some of this silicon reacted with the dissolved magnesium to form a fine precipitate of Mg/sub 2/Si. A tight dislocation structure was also created. The alloy showed good resistance to cavity formation. Tension tests at 323, 373, and 423/sup 0/K (0.35, 0.40, and 0.45 T/sub m/) showed pronounced irradiation-induced strengthening and an associated marked loss in ductility. These changes were greater than in magnesium-free aluminum and in alloys containing preexisting, thermally-aged Mg/sub 2/Si precipitate. Increasing the thermal-to-fast flux ratio from 1.7 to 2.1 caused further strengthening beyond that expected from a simple increase in silicon level.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5315518
- Report Number(s):
- CONF-800609-3; TRN: 80-011371
- Resource Relation:
- Conference: 10. international symposium on effects of radiation on materials, Savannah, GA, USA, 3 Jun 1980
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM BASE ALLOYS
PHYSICAL RADIATION EFFECTS
MAGNESIUM ALLOYS
MAGNESIUM SILICIDES
PRECIPITATION
SILICON
MICROSTRUCTURE
TENSILE PROPERTIES
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
ALUMINIUM ALLOYS
CRYSTAL STRUCTURE
ELEMENTS
MAGNESIUM COMPOUNDS
MECHANICAL PROPERTIES
RADIATION EFFECTS
SEMIMETALS
SEPARATION PROCESSES
SILICIDES
SILICON COMPOUNDS
360106* - Metals & Alloys- Radiation Effects