Phase stability, microstructure and mechanical properties in the multi-phase alloys based on the L1{sub 2}-Ni{sub 3}(Al,Be)
- Tokyo Inst. of Technology, Yokohama (Japan). Dept. of Materials Science and Engineering
- Univ. of Washington, Seattle, WA (United States). Dept. of Materials Science and Engineering
Intermetallic alloys based on the L1{sub 2}Ni{sub 3}(Al,Be) phase in the ternary Ni-Al-Be system are prepared so that the alloys are multi-phase with the B2 intermetallic compound NiBe and a Ni primary solid solution denoted as (Ni). Such three-phase alloys, Ni-16 to 20 at%Al-10 at%Be, exhibit good room temperature ductility as measured by four-point bending. In order to examine the phase stabilities and relations among constituent phases, a vertical section of the ternary system is constructed at a constant 10 at%Be mainly by differential thermal analysis. It is found that improvement in room temperature ductility can be achieved by the formation of a fine mixture of constituent phases during invariant reactions during solidification, which is further enhanced by the co-existence of the L1{sub 2} phase formed as the primary solidification phase.
- OSTI ID:
- 72486
- Report Number(s):
- CONF-941144--; ISBN 1-55899-265-0
- Country of Publication:
- United States
- Language:
- English
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