Abstract
Tensile tests were carried out on annealed, unalloyed vanadium from 200 to 500 °C at strain rates ranging from 10-1 to 10-5 s-1 to investigate the interaction between Ti and interstitial O, C, and N solutes in the V-4Cr-4Ti alloy. Dynamic strain aging (DSA) is manifested in unalloyed vanadium at 300 and 400 °C as serrations (continuous) and discontinuous yielding in the Lüders strain and work hardening regimes of stress-strain curves with a concomitant negative value in strain rate sensitivity (SRS) for flow stresses. Diffusion data indicate that the DSA phenomenon at temperatures below 400 °C is related to the migration of carbon and oxygen while at higher temperatures nitrogen becomes increasingly important. DSA occurs in V-4Cr-4Ti within the temperature range from 300 to 750 °C (J. Nucl. Mater 283-287 (2000) 508). The data shows that alloying with Ti and Cr solutes shifts the maximum negative SRS from 300 °C in vanadium to ∼ 600 °C in the alloy.
| Original language | English |
|---|---|
| Pages (from-to) | 596-600 |
| Number of pages | 5 |
| Journal | Journal of Nuclear Materials |
| Volume | 307-311 |
| Issue number | 1 SUPPL. |
| DOIs | |
| State | Published - Dec 2002 |
Funding
The authors acknowledge the efforts of C.O. Stevens in carrying out the tensile tests with care and attention to detail. This research was sponsored by the Office of Fusion Energy Sciences, US Department of Energy under contract DE-AC05-00OR22725 with UT-Battelle, LLC.
| Funders | Funder number |
|---|---|
| U.S. Department of Energy | DE-AC05-00OR22725 |
| Fusion Energy Sciences |