Martensitic Transformation and Shape Memory Effect in Polycomponent TiNi-Based Alloys
The Centre of Science State "The Institute of Strength Physics and Materials Science", Siberian Branch, Russian Academy of Science, Tomsk 634055, Russia
2 The Institute of Metal Physics, Ural Branch, Russian Academy of Science, Ekaterinburg 620219, Russia
The results of martesitic transformation (MT) and shape memory effect (SME) in quaternary Ti50(NiCoCu)50’ Ti50(NiFeCu)50 and (TiAl)50(NiCu)50 alloys studies arc generalized in this paper. On alloying TiNi simultaneously by two elements, their individual effect on MT and SME is conserved. Martensitic transformations B2→R and B2→B19' are almost simultaneously realizing in a binary TiNi. One can selectively control each of two MT channels by selecting property of alloying elements. As a result, the alloys having any sequences of MT and their realizations temperatures, including simultaneous realization of two MTs at low temperatures, which was not observed earlier, can be produced.
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