I-2 Effects of alloying addition on microstructure and properties of TiAl-based cast alloys(Session: Casting/Molding)
Year: 2006
Type: conference-paper
Abstract: This research was for compared studying of microstructure from as-cast receive and the condition after heat process by studied about the effect of Nb to γ-TiAl based which had the composition of Ti-46A1, Ti48Al, Ti-46Al-5Nb, Ti-48Al-5Nb, Ti-46Al-10Nb and Ti-48Al-10Nb. Six alloys were prepared by arc-melt under argon atmosphere. Then divided work level into 2 groups, the first group was as-cast receive and the second was brought to heat treatment at 1350℃ for 6 hours with was protected by argon atmosphere. After that brought both of work pieces to be analyzed with optical and scanning electron microscopy, X-ray Diffraction and mechanical properties test. The result of research found that when Nb increased more would make columnar dendrite structure as-cast receive was decreased and disintegrated to equiaxed dendrite, it also effected to the quantity of lamellar γ-TiAl single phase had be increased stable when passed heat treatment in alloys Ti-46Al+Nb and effected to be decreased of columnar dendrite size when the quantity of Nb was increased more and effected to the grain size with more exhaustive in case of Ti-48Al+Nb.
Authors: Santirat Nansaarng, Panya Srichandr
Institution: King Mongkut's University of Technology Thonburi
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W397938121