Shape Memory Characteristics of Ti-Ni Alloy Using Mechanically-Alloyed Powder

Abstract:

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In this research, we investigated the fabrication conditions of Ti-Ni alloy powder by MA process and the shape memory characteristics of the sintered alloy by a pulse-current sintering equipment using mechanically alloyed powder (MA powder). The microstructure of the sintered alloy of the MA powder was more homogeneous than that of the alloy of the elemental powders. The application of the MA powder makes the width between transformation temperatures of the shape memory treated alloy of the MA powder became narrower, that is, it improves the temperature response of the compact. The tensile strength and elongation of the shape memory compact of the MA powder were approximately 780 MPa and 7.5 %, respectively. This is one of the superior tensile properties of SMA compact fabricated by powder metallurgy process. The superelastic behavior took place in the alloy of the MA powder. Thus, the MA process in short process time resulted in lower contamination of the MA powder and the application of the MA powder resulted in superior shape memory characteristics of the sintered alloy.

Info:

Periodical:

Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

3313-3318

DOI:

10.4028/www.scientific.net/MSF.539-543.3313

Citation:

A. Terayama et al., "Shape Memory Characteristics of Ti-Ni Alloy Using Mechanically-Alloyed Powder", Materials Science Forum, Vols. 539-543, pp. 3313-3318, 2007

Online since:

March 2007

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$35.00

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