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Ageing in Parent Phase and Martensite Stabilization in a Ni50Ti30Hf20 Alloy

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Fig. 2Reverse transformation temperature peak Apeak vs ageing time inparent phase for all the investigated thermal treatments
Fig. 3XRD spectra detected in martensite phase at T ¼ 303 K. The temperature of ageing in parent phase is indicated on each spectrum.At the bottom the set of the calculated diffraction lines
Table 1�Apeak ¼ ðA0peak � ApeakÞ=K as a function of different stabiliza-tion times for the martensite ageing temperatures 481 K, 486 K, 491 K.
Fig. 7Arrhenius plot for �Apeak ¼ 4 K (s), 5 K (�), 6 K (u), 7 K (4), 8 K(n) deduced from data in Fig

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