Abstract
Plastic instability in uniaxial tensile deformation has been investigated for the body centered cubic (bcc) and hexagonal close packed (hcp) pure metals, V, Nb, Mo, and Zr, after low temperature (60-100 °C) neutron irradiation up to 0.7 dpa. Relatively ductile metals, V, Nb, and Zr, experienced uniform deformation prior to necking at low doses and prompt plastic instability at yield at high doses. Mo failed in a brittle mode within the elastic limit at doses above 0.0001 dpa. V showed a quasi-brittle failure at the highest dose of 0.69 dpa. In the ductile metals, plastic instability at yield occurred when the yield stress exceeded the plastic instability stress (PIS), which was nearly independent of dose. The PIS values for V, Nb, Mo, and Zr were about 390, 370, 510, and 170 MPa, respectively. The coincidence of plastic instability at yield and dislocation channeling cannot be generalized for all metallic materials.
| Original language | English |
|---|---|
| Pages (from-to) | 998-1002 |
| Number of pages | 5 |
| Journal | Journal of Nuclear Materials |
| Volume | 329-333 |
| Issue number | 1-3 PART B |
| DOIs | |
| State | Published - Aug 1 2004 |
| Event | Proceedings of the 11th Conference on Fusion Research - Kyoto, Japan Duration: Dec 7 2003 → Dec 12 2003 |
Funding
This research was sponsored by US Department of Energy, Offices of Fusion Energy Sciences and Basic Energy Science, under Contract DE-AC05-00OR22725 with UT-Battelle, LLC. The authors express special thanks to Drs S.J. Zinkle, R.E. Stoller, and D.T. Hoelzer, for their technical reviews and thoughtful comments.
| Funders | Funder number |
|---|---|
| Fusion Energy Sciences and Basic Energy Science | DE-AC05-00OR22725 |
| U.S. Department of Energy |