Evolution of the positron annihilation lifetime for ageing in {beta} phase Cu-Al-Ni-(Ti)-(Mn) shape memory alloys
- Katholieke Universiteit Leuven (Belgium). Dept. Metaalkunde en Toegepaste Materiaalkunde
- Rijksuniversiteit Gent (Belgium). Vakgroep Subatomaire en Stralingsfysica
During the last years, the positron annihilation technique has proven to be a sensitive tool for the characterization of phase transitions, and in particular of the martensitic transformation in Cu-based alloys. The differences in structure between the high temperature phase (cubic) and the martensite (monoclinic) produce distinctive positron annihilation characteristics which allow the determination of the transformation temperature range. In the present article the influence of these parameters on the positron annihilation characteristics of three Cu-Al-Ni shape memory alloys is discussed. Two of the chosen compositions contain Ti and Mn, which have been added to the ternary Cu-Al-Ni alloy in order to improve its mechanical properties. The effect of those elements has also been evaluated.
- OSTI ID:
- 105946
- Journal Information:
- Scripta Metallurgica et Materialia, Vol. 33, Issue 5; Other Information: PBD: 1 Sep 1995
- Country of Publication:
- United States
- Language:
- English
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