Abstract
The A-21 steel is an Fe-Cr-Co-Ni-Mo-Ti-C steel that is strengthened by a fine distribution of titanium carbide (TiC) precipitates formed by thermomechanical treatment. Transmission electron microscopy of the A-21 reveals a high number density of small TiC particles uniformly distributed in the matrix. Below ≈600 °C, the strength of A-21 is less than the average value for conventional Cr-Mo or reduced-activation ferritic/martensitic steels. However, the strength is greater above 600 °C. The Charpy impact properties of A-21 are comparable to those of the conventional and reduced-activation steels. Due to the fine TiC particles in the matrix, the creep-rupture properties of A-21 are superior to those of conventional Cr-Mo or reduced-activation Cr-W steels. Although the composition of the A-21 is not applicable for fusion because of the cobalt, the innovative production process may offer a route to an improved steel for fusion.
| Original language | English |
|---|---|
| Pages (from-to) | 697-701 |
| Number of pages | 5 |
| Journal | Journal of Nuclear Materials |
| Volume | 283-287 |
| Issue number | PART I |
| DOIs | |
| State | Published - Dec 2000 |
Funding
Research sponsored by the Office of Fusion Energy Sciences, US Department of Energy, under contract DE-AC05-96OR22464 with Lockheed Martin Energy Research Corp.