Amorphous multielementary alloys : A preparation route for shape memory alloys
In: Proceedings of the 12th International Symposium on Metastable and Nano-Materials (ISMABNAM-2005), July 3-7, 2005, Paris, FranceJournal of alloys and compounds 434-35:268-271; Jg. 434-35 (2007) S. 268-271
Online
Konferenz
- print, 10 ref
Rapid solidification methods (planar flow casting and twin roll casting) have been used to improve and simplify processing of shape memory alloys. Our goal is to synthesize amorphous as-cast materials and then near-net shaping can be obtained while working in the supercooled liquid temperature region. Materials are thereafter crystallized in order to recover a reversible austenite-martensite transformation. Alloying equiatomic Ni-Ti intermetallic compound with selected elements leads to better glass forming ability (GFA). Despite the fact that compositional requirements for obtaining thermoelastic reversible martensitic transformation and glass formation are different and contradictory, the pseudo-binary alloys developed by substitution of Zr, Hf for Ti, and Cu, Co, Pd, Sn for Ni are good candidates to exhibit both phenomena. We report here a choice of compositions, which after fast cooling, are amorphous and demonstrate a superplastic behaviour in the AT (Tx - Tg) region. After an adequate thermal treatment, a martensitic phase is obtained for some compositions, and such alloys demonstrate shape memory and superelastic properties.
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Amorphous multielementary alloys : A preparation route for shape memory alloys
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Autor/in / Beteiligte Person: | OCHIN, P ; KOLOMYTSEV, V ; PASKO, A ; SEZONENKO, A ; VERMAUT, Ph ; PRIMA, F ; PORTIER, R |
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Quelle: | Proceedings of the 12th International Symposium on Metastable and Nano-Materials (ISMABNAM-2005), July 3-7, 2005, Paris, FranceJournal of alloys and compounds 434-35:268-271; Jg. 434-35 (2007) S. 268-271 |
Veröffentlichung: | Lausanne: Elsevier, 2007 |
Medientyp: | Konferenz |
Umfang: | print, 10 ref |
ISSN: | 0925-8388 (print) |
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