Microstructure and martensitic transformation of CuAlNi and CuAlNiZr melt spun ribbons with shape memory effect.

• Autorzy: Dutkiewicz J. , Czeppe T. , Morgiel J.
• Konferencja: XVth Physical Metallurgy and Materials Science Conference on Advanced Materials & Technologies AMT'98, 17-21 May 1998, Kraków-Krynica, Poland
• Języki publikacji: EN

Abstrakty

EN

The reversible martensite transformation in CuAlNi and CuAlNiZr bulk alloy and melt spun ribbons was investigated using microcalorymetry and electron microscopy. The addition of Zr to CuAlNi resulted in precipitation of Cu2AlZr type phase containing 42.4at.%Cu, 12.5at.%Ni, 22.1at.%Al and 23.1at.%Zr. These precipitates lowered grain size in bulk and in ribbons down to 100 and 1 micrometer respectively. The higher cooling rate caused decrease of Ms in both alloys by 20 and 110 degrees centigrade respectively. Simultaneously, both the width of martensite plates and the diameter of (CuNi)2AlZr precipitates decreases down to 0.1-0.01 micrometer to 0.02 micrometer respectively. The martensitic transformation hysteresis in ribbons is wider than in bulk material.

Słowa kluczowe

EN

martensite transformation; microstructure; alloy; copper; aluminium; niobum; shape; memory

PL

przemiana martenzytyczna; mikrostruktura; stop; miedź; aluminium; niob; kształt; pamięć

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 3
• Strony: 475--478

Twórcy

autor

Dutkiewicz J.

autor

Czeppe T.

autor

Morgiel J.

• Polish Academy of Sciences, Institute of Metallurgy and Materials Science, Kraków