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Heating-cooling DSC thermograms and temperature evolutions of the elastic modulus and internal friction of nondeformed single crystal. The martensitic transformation temperatures are shown by arrows.
Selected tensile stress-strain curves from the measurements taken on the -oriented single crystal. The measurements are made first at , then in a sequence from (see text for details).
Selected thermally induced strain recovery (contraction) of the specimen tested in tension (Fig. 2) during heating from to . Curves 1–7 correspond to , 80, 100, 120, 140, 180, and , respectively. The measurements are made first at , then in a sequence from (see text for details). Inset: an example of the first heating DSC curve after specimen transformation-induced deformation at . The second complete thermal cycle is also shown.
Tensile stress-temperature phase diagram of -oriented single crystal showing the dependencies of the critical stress for the forward, (circles) and reverse, (squares) MT. A linear approximation of the data points is used.
MT temperatures and , the transformation heat , the lattice parameters of the unit cells in pseudocubic coordinate system used for the calculation of transformation strains, and the temperature derivative of the average value of critical tensile stress compared with the calculated one using Clausius-Clapeyron relationship for -oriented single crystal.
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