Tensile behavior of helium-implanted and neutron-irradiated
Vanadium alloys are being considered for use for first-wall and blanket structures in fusion reactors due to their high melting points and low neutron activation. The alloy reported on here, V-15 Cr-5 Ti, was prepared by the Westinghouse Advanced Reactors Division (Heat HSV-307). Since the fusion environment produces helium in all common structural alloys including vanadium, the effect of helium in irradiated alloys was investigated. In a fusion reactor spectrum, approx. 5 at. ppm He/dpa is expected. Ideally, the helium should be produced concurrently with displacement damage. However, since this is difficult or impossible in vanadium without a source of high-energy neutrons, cyclotron implantation of helium followed by fission reactor irradiation was chosen. By this method, it was hoped to scope qualitatively the effect of helium alone and the synergistic effect of helium in conjunction with neutron irradiation. Results show that: (1) cyclotron injection of 80 at. ppm He has little effect on mechanical properties of V-15 Cr-5 Ti at 700 and 625/sup 0/C and causes a factor of approx. 2 reduction in elongation at 400/sup 0/C; and (2) neutron irradiation to 24 to 32 dpa increases the strength of annealed V-15 Cr-5 Ti by a factor of approx. 2 and decreases ductility by a factor of about 10.
- Research Organization:
- Oak Ridge National Lab., TN
- OSTI ID:
- 5703763
- Report Number(s):
- CONF-860610-; TRN: 88-008303
- Journal Information:
- Trans. Am. Nucl. Soc.; (United States), Vol. 52; Conference: American Nuclear Society annual meeting, Reno, NV, USA, 15 Jun 1986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
CHROMIUM ALLOYS
PHYSICAL RADIATION EFFECTS
VANADIUM ALLOYS
ANNEALING
DUCTILITY
EXPERIMENTAL DATA
HELIUM
HELIUM IONS
ION IMPLANTATION
MECHANICAL PROPERTIES
NEUTRONS
THERMONUCLEAR REACTOR MATERIALS
ULTIMATE STRENGTH
ALLOYS
BARYONS
CHARGED PARTICLES
DATA
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FLUIDS
GASES
HADRONS
HEAT TREATMENTS
INFORMATION
IONS
MATERIALS
NONMETALS
NUCLEONS
NUMERICAL DATA
RADIATION EFFECTS
RARE GASES
TENSILE PROPERTIES
700209* - Fusion Power Plant Technology- Component Development & Materials Testing
360106 - Metals & Alloys- Radiation Effects