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COMPARATIVE STUDY OF CERTAIN Cu-Zn-Al-TYPE ALLOYS CONCERNING THEIR SUPERELASTIC BEHAVIOR AND SHAPE MEMORY

I. Hopulele1, S. Istrate1, S. Stanciu1, Gh. Calugaru1,*

Affiliation

  1. Technical University “Gh. Asachi”, Iassy, Romania

Abstract

Three alloys have been studied with the composition ranging between (22.0-22.5)% wt Zn, (5-6,5) % wt Al ,balance Cu , obtained by melting in an induction furnace and gravitational casting. The samples cast from the three alloys have been subjected to loading - unloading trials by stressing. The papers presenting also the corresponding diagrams which give the pseudoelastic parameters. The shape memory effect (SME) and two way shape memory effects (TWSME) have been studied by dilatometric analysis and the effect of small variations in the Zn and Al compositions on the critical points has been revealed . At the same time , the tensile and dilatometric curves for the plastically deformed and annealed samples have proved a visible improvement in the shape memory effect..

Keywords

Shape memory alloy, Cu-Zn-Al, Dilatometric analysis, Pseudoelasticity.

Submitted at: Aug. 1, 2002
Accepted at: March 15, 2004

Citation

I. Hopulele, S. Istrate, S. Stanciu, Gh. Calugaru, COMPARATIVE STUDY OF CERTAIN Cu-Zn-Al-TYPE ALLOYS CONCERNING THEIR SUPERELASTIC BEHAVIOR AND SHAPE MEMORY, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 1, pp. 277-282 (2004)