Investigation of a new type of Al{sub 3}Ti-based L1{sub 2} alloy with second phase precipitation
- Shanghai Jiao Tong Univ. (China). Dept. of Materials Science
Since the L1{sub 2} structured Al{sub 3}Ti alloy exists only in a narrow compositional range, further alloying of the single phase L1{sub 2} alloy to improve its property seems hardly successful. Developing two-phase or multiphase Al{sub 3}Ti alloys may be an effective approach for strengthening and toughening. In this article, a new type of Al{sub 3}Ti-based alloy which has a L1{sub 2} matrix with precipitates of a second phase is reported. The quaternary alloys based on Al{sub 67}Mn{sub 8}Ti{sub 25}, and modified with Nb additions, consist of an L1{sub 2} matrix and DO{sub 22} second phase particles in the annealed state, but the second phase can be dissolved by solution treatment and precipitated during high temperature aging. Remarkable strengthening and promising compressive ductility were exhibited by the experimental alloy. The influence of composition on the microstructure and properties of the alloys are reported also.
- OSTI ID:
- 72522
- Report Number(s):
- CONF-941144--; ISBN 1-55899-265-0
- Country of Publication:
- United States
- Language:
- English
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