Anisotropy of Cu-based shape memory alloys in tension/compression thermomechanical loads
Article Abstract:
Tension/compression thermomechanical investigations were conducted on oriented CuAlNi shape memory alloy single crystals as well as CuAlznMn single and polycrystals. On the basis of the orientation of the load axis and sense of the load, behavior of the single crystals in thermomechanical loads was anisotropic. It was found that the history dependent strain response of the single crystal in a complex tension/compression thermomechanical cycle could be predicted from the diagram constructed from experimentally determined transformation stresses and temperatures. Thermomechanical behaviors of the CuAlZnMn polycrystal under tension/compression are discussed based on the knowledge of the single crystal anisotropy.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Mechanical behavior of an Ni-Ti shape memory alloy under axial-torsional proportional and nonproportional loading
Article Abstract:
Differences in mechanical behavior among different proportional and nonproportional cyclic loading paths for a Ni-Ti shape memory alloy (SMA) were analyzed and the history of temperature was measured during the analysis. Employing a simple micromechanical model, the function of simultaneous forward and reverse transformations on the nonproportional transformation response was investigated and the direction of the inelastic strain rate is predicted. Further, load- and strain-controlled experiments at various strain rates as well as thermomechanical effects were assessed. The results are discussed.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Material characterization of SMA actuators under nonproportional thermomechanical loading
Article Abstract:
Experiments for thermally induced phase transformation of binary NiTi shape memory alloys (SMA) wires loaded by an elastic linear spring are conducted to analyze the constitutive behavior of SMAs under thermomechanical nonproportional loading. A previous model for constitutive response is employed as the basis for the theoretical prediction of the response of SMA line actuators loaded by springs with various elastic constants. To assess the predictability of the present model, model predictions are compared with experimental results.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Crossed lines in the brick factory. Empires on the moon. Crystallography of a golf ball
- Abstracts: Fugacity-based model of PCB bioaccumulation in complex aquatic food webs. A framework for evaluating bioaccumulation in food webs
- Abstracts: Transport of phosphate from soil to surface waters by preferential flow. Effects of water, salt water, and silicone overcoating of the TiO2 photocatalyst on the rates and products of photocatalytic oxidation of liquid 3-octanol and 3-octanone
- Abstracts: Rapid dechlorination of carbon tetrachloride and chloroform by extracellular agents in cultures of Methanosarcina thermophila
- Abstracts: Biotransformations of selenium oxyanion by filamentous cyanophyte-dominated mat cultured from agricultural drainage waters