SYMPOSIA PAPER Published: 01 January 1976
STP38056S

Effects of Interstitial Solutes on the Microstructures of Self-Ion Irradiated Vanadium

Source

Vanadium and vanadium containing 0.1 percent carbon, 0.4 percent carbon, 1.0 percent nitrogen, and 1.0 percent oxygen were irradiated with 3-MeV 51V+ ions in the temperature range 650 to 880°C (1202 to 1616°F) to a dose level of ∼20 dpa. The results show that nitrogen is most effective in controlling the void swelling. Carbon and oxygen also suppress the swelling considerably when compared with unalloyed vanadium. Except for vanadium-1.0 percent nitrogen, all compositions exhibit a fine platelet precipitate with {012} habit at 650°C (1202°F). In the case of vanadium-carbon alloys, this phase persisted even at higher temperatures. Vanadium and vanadium-1.0 percent oxygen showed fine precipitation on dislocations and void surfaces at 880°C (1616°F). Vanadium-0.1 percent carbon exhibited a metastable {013} carbide precipitate at 880°C (1616°F), whereas vanadium-0.4 percent carbon showed equilibrium V2C phase with some {012} precipitates. This {012} precipitation was irradiation induced and was dependent upon the carbon concentration. Vanadium-1.0 percent nitrogen did not show any evidence of precipitation over the entire temperature range.

Author Information

Agarwal, SC
Argonne National Laboratory, Argonne, Ill.
Potter, DI
Argonne National Laboratory, Argonne, Ill.
Taylor, A
Argonne National Laboratory, Argonne, Ill.
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Details
Developed by Committee: E10
Pages: 298–311
DOI: 10.1520/STP38056S
ISBN-EB: 978-0-8031-5543-5
ISBN-13: 978-0-8031-0388-7