Mean stress effects on fatigue of NiTi


Tabanli R. M. , SIMHA N., BERG B.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol.273, pp.644-648, 1999 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 273
  • Publication Date: 1999
  • Doi Number: 10.1016/s0921-5093(99)00340-8
  • Title of Journal : MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
  • Page Numbers: pp.644-648

Abstract

Fatigue properties of shape-memory alloys (SMA) play an important role in actuator and certain biomedical applications. Since a small cyclic stress can trigger martensitic transformation when the mean stress is close to a critical stress, it is crucial to understand the effect of mean stress. This paper examines mean stress effects on fatigue properties of a NiTi SMA through systematic experiments. Preliminary results indicate that the cycles-to-failure has a non-monotone dependence on the mean strain at fixed strain amplitude. (C) 1999 Elsevier Science S.A. All rights reserved.