Accession Number : ADA292310

Title :   Visit to the Department of Metallurgical Engineering, Tokyo Institute of Technology, 22 Sep 94.,

Corporate Author : ASIAN OFFICE OF AEROSPACE RESEARCH AND DEVELOPMENT APO AP 96337-0007

Personal Author(s) : McQuay, P.

PDF Url : ADA292310

Report Date : 22 SEP 1994

Pagination or Media Count : 5

Abstract : A visitor was given a brief overview of TIT by Prof Matsuo. Following that overview, the visitor gave a brief seminar on microstructure/property relationships in gamma TiAl alloys to several members of the faculty and a handful of graduate students. Prof Takeyama arrived at TIT in 1992 from the Science and Technology Agency (S&TA) National Research Institute for Metals (NRIM) which is located in Tstikuba. While at NRIM Prof Takeyama performed research on phase stability and transformations of several intermetallic alloy systems, including gamma TiAl. Since coming to TIT, Prof Takeyama has broadened this research to include microstructure/property effects, with the emphasis on fixed effect of static heat treatments on microstructure and properties, while continuing his research on the effect of ternary additions to the phase stability of near gamma alloys. The majority of the phase stability work in Ti-Al-X systems have been where X is Cr, Nb, V or Mo. Of potential commercial significance is Prof Takeyamas work on air cooling and rapid quenching from the single phase alpha region, followed by tempering or aging. Prof Takeyama has demonstrated it is possible to use quench and tempering treatments to refine the as-cast structure, thus improving the room temperature strength and ductility over typical coarse cast microstructures. jg p.3

Descriptors :   *ALLOYS, *ENGINEERING, *TITANIUM ALUMINIDE, *METALLURGY, METALS, STABILITY, MICROSTRUCTURE, MOLYBDENUM, JAPAN, PHASE, QUENCHING, NIOBIUM, GAMMA RAYS, DUCTILITY, CHROMIUM, TERNARY COMPOUNDS, TEMPERING, VANADIUM, CASTINGS, AIR COOLED.

Subject Categories : Metallurgy and Metallography
      Inorganic Chemistry
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE