Microstructure of the intermetallic compounds Al{sub 3}(Ti{sub 1{minus}x}M{sub x})
- Univ. of Tokyo (Japan). Dept. of Materials Science
An attempt was made to change the crystal structure of the intermetallic compound Al{sub 3}Ti from DO{sub 22} to L1{sub 2}, by replacing Ti with several alloying elements. The alloying elements chosen in this study were Sc, Er and Lu with which Al forms intermetallic compounds having L1{sub 2} structure. Ingots weighing about 50g of Al{sub 3}(Ti{sub 1{minus}x}M{sub x}) -- M represents alloying element and the x value is 0, 0.25 or 0.5 -- were melted in an argon plasma arc furnace. X-ray 9 diffraction, energy dispersive spectroscopy and scanning electron and optical microscopy were carried out to examine the microstructure in relation to the kind and amount of alloying elements. Microstructural observation revealed the occurrence of an L1{sub 2} phase in all M bearing alloys. Compression tests were also carried out to assess the ductility of these alloys. The results showed that the Sc alloying is effective to increase the room temperature ductility of Al{sub 3}Ti.
- OSTI ID:
- 72541
- Report Number(s):
- CONF-941144--; ISBN 1-55899-265-0
- Country of Publication:
- United States
- Language:
- English
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