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γ Phase Precipitation Processes in Quenched β Phase Cu-Zn-Al Alloys at an Electron Concentration of 1.53

Published online by Cambridge University Press:  02 July 2020

Adriana M. Condó ,
Pierre Arneodo Larochette  and
Alfredo Tolley
Adriana M. Condó
Affiliation:
CONICET.
Pierre Arneodo Larochette
Affiliation:
Metal Physics Group, Centro Atómico Bariloche, CNEA and Instituto Balseiro. 8400 San Carlos de Bariloche, Río Negro, Argentina.
Alfredo Tolley
Affiliation:
CONICET.
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Abstract

In the ternary Cu-Zn-Al alloys the bcc β phase is stable at high temperatures at electron concentrations (e/a) in the range from about 1.4 to 1.6 electrons per atom. Cu, Zn and Al atoms contribute with 1, 2 and 3 electrons, respectively. This region of stability is bounded by a β + γ twophase region at the high electron concentration border. If the P phase is retained at room temperature (RT) it transforms martensitically to a close packed structure. This transformation occurs without diffusion and provides information on the relative phase stability of the bcc and close packed structures. A detailed characterization of the microstructure of the parent bcc β phase and the martensite is thus essential for an adequate study of the transformation.

To retain the β phase at RT Cu-Zn-Al alloys must usually be quenched.

Type
Metals and Alloys
Information
Microscopy and Microanalysis , Volume 7 , Issue S2: Proceedings: Microscopy & Microanalysis 2001, Microscopy Society of America 59th Annual Meeting, Microbeam Analysis Society 35th Annual Meeting, Long Beach, California August 5-9, 2001 , August 2001 , pp. 1252 - 1253
Copyright
Copyright © Microscopy Society of America 2001

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References

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