Hysteresis evolution in the martensitic transformation cycling in {beta}-Cu-Zn-Al samples with {gamma}-phase precipitates

Journal Article · Sat Feb 15 04:00:00 EST 1997 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(96)00398-3· OSTI ID:438619

Roqueta, D O; Lovey, F C; Sade, M ^[1]

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1. Comision Nacional de Energia Atomica, San Carlos de Bariloche (Argentina)

The characteristics of the martensitic transformations in Cu-Zn-Al alloys strongly depend on the presence of {gamma}-type precipitates embedded in the transforming matrix. It has been shown that the hysteresis of a single-variant transformation in a sample containing a fine distribution of small {gamma}-type precipitates (7--10 nm average size) evolves from a relatively high value in the first cycle to an asymptotic value after several cycles. In this work the authors will show the results of the hysteresis evolution, which can be described over 3 regimes according to the precipitate size. These regimes will be related to microscopic observations of defects created around the precipitates.

• OSTI ID: 438619
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 4 Vol. 36; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
COPPER ALLOYS
CRYSTAL-PHASE TRANSFORMATIONS
DISLOCATIONS
HYSTERESIS
MARTENSITE
MONOCRYSTALS
PARTICLE SIZE
PRECIPITATION
ZINC ALLOYS