Determination of Orientation Relationship between TiC and Ti2CS in a Ti-Containing Steel by TEM

The orientation relationship between TiC and Ti2CS in a Ti-containing weathering-resistance steel were observed by TEM technology and X-ray energy dispersive spectrum (EDS). The results showed that many tiny TiC (titanium carbide) were forming on Ti2CS (titanium carbide sulfide), which precipitates on relatively higher temperature than TiC, The orientation relationship between TiC and Ti2CS is (001)(Ti2CS //){(1) over bar1 (1) over bar}(TiC); [100](Ti2CS) (//) < 001 >(TiC). The epitaxial growth is important mechanisms for titanium carbide forming in steels.