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Development of shape memory and superelastic applications of some experimental alloys

L. G. BUJOREANU1,*

Affiliation

  1. Faculty of Materials Science and Engineering, The “Gheorghe Asachi” Technical University of Iaşi, Bd. D. Mangeron 67, 700050 Iaşi, Romania

Abstract

The paper presents the results obtained during the manufacturing and testing of experimental applications of some shape memory alloys (SMAs) belonging to CuZnAl and FeMnSiCr(Ni) alloys systems, respectively. CuZnAl actuators, manufactured as bending lamellas, were processed and trained for two way shape memory effect (TWSME). After up to 500 heating-cooling cycles under applied bending load, the actuators were used to develop thermal protection systems in hydraulic and electric circuits, as well as to build up composite mini-actuators. Constrained-recovery applications of FeMnSi-based SMAs were developed under the form of pipe couplings processed from powder metallurgy mechanically alloyed (PM-MA’d) FeMnSiCrNi and of FeMnSiCr truncated cone-shaped modules, for thermal expansion compensation, processed by high-speed high pressure torsion (HS-HPT)..

Keywords

Shape memory, Superelasticity, Actuator, Thermo-mechanical training, Application.

Submitted at: April 9, 2015
Accepted at: Sept. 9, 2015

Citation

L. G. BUJOREANU, Development of shape memory and superelastic applications of some experimental alloys, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 9-10, pp. 1437-1443 (2015)