HIGH-TEMPERATURE MECHANICAL-PROPERTIES OF VANADIUM ALLOYED GAMMA-BASETITANIUM-ALUMINIDES

Authors
NOBUKI M VANDERSCHUEREN D NAKAMURA M
Citation
M. Nobuki et al., HIGH-TEMPERATURE MECHANICAL-PROPERTIES OF VANADIUM ALLOYED GAMMA-BASETITANIUM-ALUMINIDES, Acta metallurgica et materialia, 42(8), 1994, pp. 2623-2632
Citations number
22
Categorie Soggetti
Material Science","Metallurgy & Mining
Journal title
Acta metallurgica et materialia → ACNP
ISSN journal
09567151
Volume
42
Issue
8
Year of publication
1994
Pages
2623 - 2632
Database
ISI
SICI code
0956-7151(1994)42:8<2623:HMOVAG>2.0.ZU;2-T
Abstract
High temperature mechanical properties of vanadium alloyed gamma base Ti aluminides have been related to the microstructure. The microstruct ures were controlled by chemistry modification vanadium alloying betwe en 5.3 and 12.7 mol.% for phase distribution control and isothermal fo rging. The properties were evaluated using tensile tests at strain rat es between 3 x 10(-4) s-1 and 0.1 s-1 and at temperatures between 1070 and 1420 K. The gamma plus beta phase intermetallic exhibited excelle nt hot workability with an elongation more than 600% and an m-value of 0.8. The mechanism of the superplastic deformation was critically dis cussed.