Improvement of Vanadium Alloys by Precipitate Control for Structural Components of Fusion Reactors
Potential enhancement of mechanical properties of V-4Cr-4Ti by controlling precipitates of interstitial impurities (C, O and N) was investigated by means of various thermal and mechanical treatments. The increase in the cold working degree resulted in band structure of coarse Ti-CON precipitates having enhanced impact properties. Solid solution heat treatment followed by re-heating resulted in the formation of high density Ti-O-C precipitates enhancing high temperature strength. Combination of re-heating and cold rolling enhanced further the strength. Improvements in thermal and mechanical treatments are discussed for application of V-4Cr-4Ti to fusion structural materials.
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
T. Muroga et al., "Improvement of Vanadium Alloys by Precipitate Control for Structural Components of Fusion Reactors", Materials Science Forum, Vols. 475-479, pp. 1449-1454, 2005