Author： Yun J.H. Wee D.M. Oh M.H. Inui H. Yamaguchi M.
Publisher： Springer Publishing Company
ISSN： 0022-2461
Source： Journal of Materials Science, Vol.35, Iss.18, 2000-09, pp. : 4527-4532
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
Effects of nitrogen addition on the microstructure control of two-phase TiAl intermetallic compounds were investigated. 1.0 at.% nitrogen addition leads to remarkable grain refinement in the fully lamellar microstructure but had little effect on the duplex microstructure. Only Ti_3AlN precipitate was formed in 0.3 at.% nitrogen-doped alloy and both Ti_2AlN and Ti_3AlN precipitates were formed in 1.0 at.% nitrogen-doped alloy. Since the formation of the gamma phase is retarded by nitrogen addition, long-term heat treatment is needed for the duplex microstructure in the 1.0 at.% nitrogen-doped alloy. Though 0.3 at.% nitrogen-doped alloy had much lower elongation than the mother alloy, 1.0 at.% nitrogen addition had little effect on room temperature elongation and increased room temperature yield strength by two times in the fully lamellar microstructure.
Related content
Access to resources
Recommend
By Fuji A. Toshimitsu Yokobori A. Kikuchi M. Tabuchi M. Yokobori T.
The International Journal of Pressure Vessels and Piping, Vol. 80, Iss. 7, 2003-07 ,pp. :