Effect of dynamically charged helium on tensile properties of V-5Ti, V-4Cr-4Ti, and V-3Ti-1Si

Technical Report · Mon Apr 01 04:00:00 EST 1996

DOI:https://doi.org/10.2172/270427· OSTI ID:270427

Chung, H. M.; Loomis, B. A.; Nowicki, L.; Smith, D. L. ^[1]

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1. Argonne National Laboratory, Chicago, IL (United States)

In the Dynamic Helium Charging Experiment (DHCE), helium was produced uniformly in the specimen at linear rates of {approx}0.4 to 4.2 appm He/dpa by the decay of tritium during irradiation to 18-31 dpa at 424-600{degrees}C in the lithium-filled DHCE capsules in the Fast Flux Test Facility. This report presents results of postirradiation tests of tensile properties of V-5Ti, V-4Cr-4Ti, V-3Ti-1Si. The effect of helium on tensile strength and ductility was insignificant after irradiation and testing at >420{degrees}C. Contrary to initial expectation, room temperature ductility of DHCE specimens was higher than that on non-DHCE specimens, whereas strength was lower, indicating that different types of hardening centers are produced during DHCE and non-DHCE irradiation. In strong contrast to results of tritium-trick experiments, in which dense coalescence of helium bubbles is produced on grain boundaries in the absence of displacement damage, no intergranular fracture was observed in any tensile specimens irradiated in the DHCE.

• Research Organization: Oak Ridge National Lab., TN (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 270427
• Report Number(s): DOE/ER--0313/19; ORNL/M--5023; ON: DE96010874
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
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HELIUM EMBRITTLEMENT
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PROGRESS REPORT
SILICON ALLOYS
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
THERMONUCLEAR REACTOR MATERIALS
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