Metastable effects on martensitic transformation in SMA part V. fatigue-life and detailed hysteresis behavior in NiTi and Cu-based alloys

• Published in: Journal of thermal analysis and calorimetry Vol. 91; no. 2; pp. 575 - 579
• Main Authors: Carreras, G., Isalgue, A., Torra, V., Lovey, F. C., Soul, H.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.02.2008; Springer
• Subjects: Analytical Chemistry; Chemistry; Chemistry and Materials Science; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Inorganic Chemistry; Martensitic transformations; Materials science; Measurement Science and Instrumentation; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physical Chemistry; Physics; Polymer Sciences; fatigue-life; CuAlBe; frictional energy; martensitic phase transformation; NiTi; SMA; damping; dampers; Damping; Fatigue life; Nickel alloys; Martensitic transformations; Mechanical properties; Copper base alloys; Titanium alloys; Beryllium alloys; Shape memory alloy; Aluminium alloys; Copper alloys; Hysteresis
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-007-8600-z

The fatigue-life (traction-traction only) is experimentally studied mainly for pseudoelastic NiTi wire of 2.46 mm of diameter for eventual application in damping of structures under wind or rain. Thermal effects are highly relevant in determining the fatigue-life. The results shows that the fracture level overcomes 130000 cycles when the moving air is used for cooling. When the number of working cycles overcomes 30000, the frictional energy decreases 40% vs . N roughly with an exponential behavior.