Dr. V. Prieb
Technical Physics -- November 1996 -- Volume 41, Issue 11, pp. 1132-1136
Thermoelasticity and hysteresis
of martensitic transformations in shape memory alloys.
I. Hysteresis of the stress-free thermal transformation
"1st Memory Alloys GmbH", Berlin, Germany
Abstract: Calorimetric studies of the hysteresis of thermoelastic martensitic transformations in single- and poly-crystals of shape memory alloys
Cu-Al-X (X=Zn, Ni, Mn), NiTi, and Mn-Cu are carried out.
The equilibrium lines inside of hysteresis loop was found and investigated by partial cycling,
which represents a latent internal hysteresis. The dependence of total energy
dissipated in a closed cycle on the martensitic phase fraction as wekk as an energetically thermoelasticity coefficient
are determined and calculated. .
The influence of the scanning rate and the influence of the grain boundaries on the internal hysteresis and
coefficient of thermoelasticity are also investigated, and the interrelationship between thermoelasticity and hysteresis
"Calorimetry of shape memory alloys" - collected articles (pdf-file)