Reduction and removal of martensite stabilization in Cu-Zn-Al-Mn-Zr shape memory alloys

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)2765-2767
Journal / PublicationMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume28 A
Issue number12
Publication statusPublished - Dec 1997

Abstract

The thermodynamic stability of Cu-Zn-Al-Mn-Zr (CZAMZ) and Cu-Zn-Al (CZA) alloys was studied to determine the martensite phase aging which may cause martensite stabilization and destroy the thermoelasticity of martensitic transformation. Martensite phase aging was performed at 50 °C and changes in transition temperatures were measured by differential scanning calorimetry. Martensite stabilization was observed in the alloys when martensite phase aging was performed. Less aging effects and better thermodynamic stability were seen on the CZAMZ alloy. Appropriate phase aging can reduced vacancies pinning at the martensite boundaries and stabilized martensite can be revitalized.