"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Rapidly solidified bulk shape memory alloys

I. MIHALCA1,2, C. M. CRACIUNESCU1,2,*

Affiliation

  1. "Politehnica" University of Timisoara, Bd. Mihai Viteazul 1, 300222 Timisoara, Romania
  2. National Institute for Research and Development in Electrochemistry and Condensed Matter, P.A. Podeanu str., no. 144, 300569 Timisoara, Romania

Abstract

Rapidly solidified Ni-Ti bulk shape memory alloys have been manufactured using the suction method. The as-solidified rods have been characterized using DSC and internal friction methods. In the as solidified state it is shown that an inhomogenous structure may occur due to the change in the cooling rate from the outer surfaces in contact with the cooled mold and the core. Two transitions are clearly observed on cooling the as-quenched sample while during heating only one distinct peak appears on both DSC and internal friction. The heat treatment applied to the rapid solidified specimen lead to a volume transformation, similar to the one observed in similar samples prepared via the classical path. The analysis of the relaxation peak is consistent with similar known results..

Keywords

Ni-Ti, Rapid solidification, Martensitic transformation, Internal friction, Shape memory alloys.

Submitted at: Oct. 20, 2007
Accepted at: Jan. 18, 2008

Citation

I. MIHALCA, C. M. CRACIUNESCU, Rapidly solidified bulk shape memory alloys, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 1, pp. 201-206 (2008)