Abstract
The compositions of the matrices of welds in a pressure vessel steel have been determined by atom probe tomography after a series of stress relief treatments. The weld had a bulk composition of Fe-0.29 at.% Cu-1.69 at.% Mn-0.54 at.% Ni-0.69 at.% Si-0.25 at.% Mo-0.08 at.% Cr-0.38 at.% C-0.022 at.% P-0.017 at.% S and was characterized in the as-welded state, after stress relief treatments of 24 h at 650 °C, 24 h at 610 °C, and 100 h at 580 °C followed by slow cooling to room temperature and after 24 h at 650 °C and 24 h at 610 °C followed by fast cooling to room temperature. Lower stress relief temperatures and slower cooling of the material from the stress relief temperature both reduce the copper level in the matrix and should lead to less embrittlement during service in a nuclear reactor. Published by Elsevier Science B.V.
| Original language | English |
|---|---|
| Pages (from-to) | 76-79 |
| Number of pages | 4 |
| Journal | Materials Science and Engineering: A |
| Volume | 327 |
| Issue number | 1 |
| DOIs | |
| State | Published - Apr 15 2002 |
Funding
The authors thank K.F. Russell for her technical assistance. The research at the Oak Ridge National Laboratory SHaRE User Facility was sponsored by the Division of Materials Sciences and Engineering, US Department of Energy, and by the Office of Nuclear Regulatory Research, US Nuclear Regulatory Commission under inter-agency agreement DOE 1886-N695-3W with the US Department of Energy, under contract DE-AC05-00OR22725 with UT-Battelle, LLC.
| Funders | Funder number |
|---|---|
| Office of Nuclear Regulatory Research | |
| US Department of Energy | |
| U.S. Nuclear Regulatory Commission | DE-AC05-00OR22725 |
| Division of Materials Sciences and Engineering |
Keywords
- Atom probe
- Ductility
- Pressure vessel steel
- Welds