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

Manganese and Zr (1 and 5%, respectively) were added to the Cu-Zn-Al alloy in the present study. It is concluded that martensite stabilization was observed in both alloys when martensite phase aging was imposed. However, the aging effects were less serious for the Cu-Zn-al-Mn-Zr alloy. With appropri...

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Veröffentlicht in:	Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 1997-12, Vol.28 (12), p.2765-2767
Hauptverfasser:	LAM, C. W. H, CHUNG, C. Y, ZOU, W. H, LAI, J. K. L
Format:	Artikel
Sprache:	eng
Schlagworte:	Aluminum base alloys Applied sciences Copper Cross-disciplinary physics: materials science rheology Exact sciences and technology Manganese Martensite Martensitic transformations Materials science Metals. Metallurgy Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Physics Shape memory alloys Zirconium
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Beschreibung
Zusammenfassung:	Manganese and Zr (1 and 5%, respectively) were added to the Cu-Zn-Al alloy in the present study. It is concluded that martensite stabilization was observed in both alloys when martensite phase aging was imposed. However, the aging effects were less serious for the Cu-Zn-al-Mn-Zr alloy. With appropriate parent phase aging after the martensite phase aging, vacancies pinning at the martensite boundaries can be reduced. The stabilized martensite can be revitalized. The transformation temperatures can be lowered again for both alloys. Nevertheless, Cu-Zn-Al-Mn-Zr SMA exhibited a better thermal stability than the Cu-Zn-Al SMA.
ISSN:	1073-5623 1543-1940
DOI:	10.1007/s11661-997-0035-4