Deformation and fracture of TiAl + W at elevated temperatures
- Los Alamos National Lab., NM (USA)
- Wright State Univ., Dayton, OH (USA). Dept. of Mechanical Materials Engineering
The ternary alloy, Ti - 49 at% Al -2 at. % W, was produced using Rotating Electrode Powder (REP) compacted by hot extrusion. The tensile properties of this alloy (strength, ductility and fracture mode) were studied from room temperature to 900{degrees}C. Constant load creep properties were measured from 700 to 900{degrees}C and analyzed using conventional power law equations to calculate the stress exponent and activation energy. These parameters were approximately 4 and 400 KJ/mole respectively. TEM examination showed that the W was held in solid solution during the tensile and creep deformation when the material was tested in the as-extruded' condition. These results are interpreted as evidence for solid solution strengthening of the TiAl matrix by the W solute. 13 refs., 3 figs., 4 tabs.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- Sponsoring Organization:
- DOE/MA
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 7168304
- Report Number(s):
- LA-UR-90-25; CONF-900425--1; ON: DE90006490
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
CREEP
CRYSTAL STRUCTURE
DEFORMATION
EXTRUSION
FABRICATION
FRACTURE PROPERTIES
MATERIALS WORKING
MECHANICAL PROPERTIES
MICROSTRUCTURE
TENSILE PROPERTIES
TERNARY ALLOY SYSTEMS
TITANIUM ALLOYS
TUNGSTEN ALLOYS