Accession Number : ADA262443


Title :   Fundamentals of Mechanical Behavior in Intermetallic Compounds


Descriptive Note : Final rept. 1 Oct 89-30 Sep 92


Corporate Author : CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF MATERIALS SCIENCE AND ENGINEERING


Personal Author(s) : Howe, James M ; Thompson, Anthony W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a262443.pdf


Report Date : 01 Feb 1993


Pagination or Media Count : 16


Abstract : This research program has examined mechanical behavior and creep of titanium aluminide alloys, both based on Ti3Al and TiAl, with the goal being better understanding of relationships between microstructure and mechanical properties of these intermetallic compound-based alloys. Detailed microstructural characterization has been conducted for both types of aluminide alloys. For Ta additions to TiAl alloys, which are thought to improve ductility, lowered stacking fault energy and increased twinning have been found. For a Ti3Al-based alloy, detailed stress and temperature dependences of creep have been measured, and a strong microstructural dependence of creep properties has been established.


Descriptors :   *ALLOYS , *TITANIUM ALUMINIDE , *INTERMETALLIC COMPOUNDS , STRESSES , TEMPERATURE , MECHANICAL PROPERTIES , MICROSTRUCTURE , ENERGY , CREEP , DUCTILITY , TANTALUM , STACKING , FAULTS , ALUMINIDES


Subject Categories : Inorganic Chemistry
      Properties of Metals and Alloys
      Crystallography
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE