The hysteresis in the martensitic transformations due to the interaction with precipitates in Cu-Zn-Al alloys

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(96)00050-4· OSTI ID:250702

Roqueta, D; Lovey, F C; Sade, M ^[1]

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

A systematic survey on the effects of two-phase microstructures on the martensitic transformation has been presented mainly based on experimental results from iron-base alloys. In a similar fashion, the characteristics of the martensitic transformations in Cu-Zn-Al alloys depend strongly on the presence of {gamma}-type precipitates embedded in the transforming matrix. It has been observed in global transformations that the Ms temperature decreases and the hysteresis becomes wider with the precipitate size. In addition, changes of the hysteresis loops with the transformation cycles have also been reported. In this work, the dependence of the hysteresis with the precipitate size and the number of transformation cycles in stress-induced single-variant transformation is experimentally studied. The asymptotic value of the hysteresis width is analyzed in terms of a simple model based on the mechanisms of plastic deformation.

• OSTI ID: 250702
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 11 Vol. 34; ISSN 1359-6462; ISSN XZ503X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AGING
ALUMINIUM ALLOYS
COPPER ALLOYS
CRYSTAL-PHASE TRANSFORMATIONS
DISLOCATIONS
HEAT TREATMENTS
MATHEMATICAL MODELS
MONOCRYSTALS
PLASTICITY
QUENCHING
STRESSES
ZINC ALLOYS