Void swelling and segregation in dilute nickel alloys. [3. 5 MeV /sup 58/Ni/sup +/ irradiation]
Five binary alloys containing 1 at.% of Al, Ti, Mo, Si and Be in nickel were irradiated at temperatures from 525 to 675/sup 0/C with 3.5-MeV /sup 58/Ni/sup +/ ions. The resultant microstructures were examined by TEM, and void diameters, number densities and swelling are presented for each alloy over the temperature interval investigated. A systematic relation between solute misfit (size factor) and void swelling is established for these alloys. Solute concentration profiles near the irradiated surface were determined and these also exhibited a systematic behavior--undersize solutes segregated to the surface, whereas oversize solutes were depleted. The results are consistent with calculations based on strong interstitial-solute trapping by undersize solutes and vacancy-solute trapping by oversize solutes that are weak interstitial traps.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 7218843
- Report Number(s):
- CONF-770641-1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
ALUMINIUM ALLOYS
ATOMIC IONS
BERYLLIUM ALLOYS
CHARGED PARTICLES
ENERGY RANGE
HIGH TEMPERATURE
IONS
MEV RANGE
MEV RANGE 01-10
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NICKEL IONS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SILICON ALLOYS
SWELLING
TITANIUM ALLOYS
VOIDS