JSME International Journal Series A Solid Mechanics and Material Engineering
Online ISSN : 1347-5363
Print ISSN : 1344-7912
Deformation
Fundamental Deformation and Recovery Behaviors of Ni-Ti-Nb Shape Memory Alloy
Masaki KUSAGAWAToshiya NAKAMURAYasuhide ASADA
Author information
JOURNALS FREE ACCESS

2001 Volume 44 Issue 1 Pages 57-63

Details
Abstract

Fundamental deformation and deformation-recovery behaviors of Ni-Ti-Nb shape memory alloy were experimentally investigated, especially their dependency on test temperature. Monotonic tension tests and deformation-recovery tests were conducted at low and high temperatures ranging from 253 K to 473 K. Stress-strain response above 323 K is quite different from that below the temperature. The yield stress shows the positive temperature-dependency below 323 K and the opposite trend is observed above this temperature. From this result, it is estimated that the dominant mechanism of inelastic deformation is the plastic deformation above 323 K and the pseudo-elastic one below it. The temperature at which strain recovery starts strongly depends on the maximum prestrain and prestraining temperature. Residual strain is always observed in the deformation-recovery tests. Also it is found that the larger recovery strain can be obtained for the larger prestrain and at the lower prestraining temperature.

Information related to the author
© 2001 by The Japan Society of Mechanical Engineers
Previous article Next article
feedback
Top