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Abstract
The double martensitic transformation in β1 Cu[sbnd]Zn alloy was studied by dilatometry and acoustic emission analysis, as represented by root mean square voltage and ring-down counting. The slowly growing banded martensite is distinguished by ditatometric changes and very low amplitude, high repetition-rate acoustic emission. The burst-type martensite is completely self-accommodated, accompanied by high amplitude, low repetition-rate emission bursts. The effect of thermal cycling on both the number of ring-down counts and the apparent martensitic start and end temperatures is discussed.