Abstract
The deformed microstructure in 316 stainless steel (316SS) after neutron irradiation in the range of 65-100 °C to 0.78 dpa was investigated by transmission electron microscopy (TEM). Deformation-induced martensite transformation and dislocation channeling were observed at irradiation dose higher than 0.1 dpa. Estimation of the resolved shear stress (RSS) associated with each dislocation channel indicated a tendency for the RSS and channel width to be greatest when the angle between tensile axis and slip plane normal is around 45°. Furthermore, channel width increased with increasing RSS, indicating that the most extensive localized channel deformation tends to occur at a high RSS level. Deformation-induced martensite phase was found at various strain levels even at room temperature and tends to be exhibited mainly at intersections of channels. This suggests that a very high stress could lead to the γ → α martensite formation by the spreading of a Shockley partial dislocation over successive 〈1 1 1〉fcc planes.
| Original language | English |
|---|---|
| Pages (from-to) | 960-965 |
| Number of pages | 6 |
| Journal | Journal of Nuclear Materials |
| Volume | 367-370 B |
| Issue number | SPEC. ISS. |
| DOIs | |
| State | Published - Aug 1 2007 |
Funding
This research was sponsored by the Office of Fusion Energy Sciences, US Department of Energy, under contract No DE-AC05-00OR22725 with UT-Battelle, LLC.
| Funders | Funder number |
|---|---|
| U.S. Department of Energy | DE-AC05-00OR22725 |
| Fusion Energy Sciences |