Abstract
The development of porosity at 1000 °C in an oxide dispersion-strengthened ferritic alloy containing nanoscale (∼2-4 nm) oxide particles is investigated. A comparison with an alloy fabricated by internal oxidation instead of mechanical alloying demonstrates that the porosity formation is associated with mechanical alloying of the alloy powder with Y2O3 in argon. The pores grow in spite of a submicron grain size suggesting that the grain boundaries are not effective paths for removing entrapped gas from the pores.
| Original language | English |
|---|---|
| Pages (from-to) | 1040-1043 |
| Number of pages | 4 |
| Journal | Scripta Materialia |
| Volume | 57 |
| Issue number | 11 |
| DOIs | |
| State | Published - Dec 2007 |
Funding
This research was sponsored by the Division of Materials Sciences and Engineering, US Department of Energy, under Contract DE-AC05-00OR22725 with UT-Battelle, LLC. A portion of this research was conducted at the SHaRE User Facility, which is sponsored by the Office of Basic Energy Sciences, Division of Scientific User Facilities, US Department of Energy. The review of the manuscript by Y. Yamamoto and J.T. Busby is gratefully acknowledged.
| Funders | Funder number |
|---|---|
| Division of Scientific User Facilities | |
| Office of Basic Energy Sciences | |
| US Department of Energy | DE-AC05-00OR22725 |
| Division of Materials Sciences and Engineering |
Keywords
- High temperature deformation
- Mechanical alloying
- Oxide dispersion strengthening
- Porosity
- Steels