Abstract
The mechanical properties of V-Cr-Ti type alloys depended on heat treatment conditions and Cr concentrations. In this paper the correlation between mechanical properties and heat treatment conditions as a function of Cr concentrations was explored using mini-size Charpy impact tests and microstructure observations. Vanadium alloys evaluated were V-xCr-4Ti (x=4, 7, 10, 12, 15, 20). Microstructure observations using transmission electron microscope (TEM) were performed to characterize the precipitates. The typical precipitates in the V-xCr-4Ti alloys were identified as Ti(C,O,N) and TiO 2. Ti(C,O,N) was observed in specimens annealed between 900 and 1000 °C and TiO2 was between 1100 and 1200 °C. The DBTT of V-(4,7)Cr-4Ti alloys was around -190 °C, while DBTT for the other alloys were above -30 °C. It is proposed that formation of precipitates larger than 400 nm in diameter found in the alloys containing more than 10% of Cr as well as solution hardening of Cr are affected to the increase of the DBTT of the alloys.
| Original language | English |
|---|---|
| Pages (from-to) | 457-461 |
| Number of pages | 5 |
| Journal | Journal of Nuclear Materials |
| Volume | 329-333 |
| Issue number | 1-3 PART A |
| DOIs | |
| Publication status | Published - 2004 Aug 1 |
| Event | Proceedings of the 11th Conference on Fusion Research - Kyoto, Japan Duration: 2003 Dec 7 → 2003 Dec 12 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Materials Science(all)
- Nuclear Energy and Engineering