Oxygen effects on irradiated tantalum alloys

P. Hosemann, S.A. Maloy, R.R. Greco, Gregory Swadener, T. Romero

Research output: Contribution to journalArticlepeer-review


Ta and Ta-1% W are being considered to be used as target clad materials in the LANSCE proton beam line for the material test station (MTS). To investigate the embrittlement of these materials due to oxygen contamination and proton irradiation, Ta and Ta-1 wt% W (as received and with ~400 ppm O) were exposed to a 3.5 MeV proton beam at the ion beam materials laboratory at LANL. After irradiating the samples in the proton beam, nanoindentation was performed in cross-section to investigate the hardness increase of the materials due to irradiation. The nanoindentation showed that the hardness increase due to irradiation is between 9% and 20% depending on the material. The results show good agreement with mechanical testing results on tantalum and Ta-1 wt% W after high energy proton irradiation to doses up to 23 dpa.
Original languageEnglish
Pages (from-to)25-29
Number of pages5
JournalJournal of Nuclear Materials
Issue number1
Early online date7 Oct 2008
Publication statusPublished - 31 Jan 2009


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