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Micro- and Crystal-Structural Observations of Al-Rich Nb and Al-Rich Ti Alloys

Published online by Cambridge University Press:  01 January 1992

K. Mizuuchi ,
Y. Okanda ,
M. Kitamura ,
C.V. Cooper ,
A.F. Giamei  and
H.R.P. Inoue
K. Mizuuchi
Affiliation:
Osaka Municipal Technical Research Institute, Osaka, 536, Japan
Y. Okanda
Affiliation:
Osaka Municipal Technical Research Institute, Osaka, 536, Japan
M. Kitamura
Affiliation:
Electrical and Electronic Engineering, Utsunomiya Univ., Utsunomiya 321, Japan
C.V. Cooper
Affiliation:
United Technologies Research Center, East Hartford, CT 06108
A.F. Giamei
Affiliation:
United Technologies Research Center, East Hartford, CT 06108
H.R.P. Inoue
Affiliation:
Materials Science and Engineering, Univ. of Washington, Seattle, WA 98195.
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Abstract

Microstructural observations, phase identification, and hardness measurements of several ternary and quaternary A13Nb− and A13Ti-based alloys containing Ni or Fe have been carried out after homogenization at 1100°C. An L12 phase is formed in an (A1,Fe)3Ti-based alloy when a small amount of Nb is added. Conversely, in Al-Nb-Ni alloys whose compositions are based on Al3Nb, no L12 phase has been detected. In this case, alloys are either three-phase(B2, DO22 and Laves) or two-phase(B2 and Laves). The absence of the Ll2 phase formation in AlgNb-based alloys containing Ni is attributed to limited solubility of Ni in the Al3Nb compound. Rapidly solidified and slowly cooled specimens have also been analyzed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 1191
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

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