Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Multi-stage martensitic transformations induced by repeated thermal cycling of equiatomic TiNi alloy. / Resnina, N.; Belyaev, S.
в: Journal of Alloys and Compounds, Том 486, № 1-2, 03.11.2009, стр. 304-308.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Multi-stage martensitic transformations induced by repeated thermal cycling of equiatomic TiNi alloy
AU - Resnina, N.
AU - Belyaev, S.
PY - 2009/11/3
Y1 - 2009/11/3
N2 - Usually a multi-stage martensitic transformation is observed in Ni-rich TiNi alloys after heat treatment at 350-500 °C. It is due to the internal stresses created by the Ni4Ti3 participate. In the present work it was found that the multi-stage martensitic transformation appeared in Ti-50.0 at.% Ni alloy after thermal cycles through the temperature range of the phase transitions. Annealed sample undergoing one-stage phase transition was subjected to 32 thermal cycles in the DSC apparatus. The results had shown that three-stage forward martensitic transformation observed after 32 thermal cycle was due to the B2 → R, B2 → B19′ and R → B19′ phase transitions. It was found that the B19′ phase obtained from the B2 phase underwent the reverse transformation at higher temperatures than the B19′ phase obtained from the R phase. After annealing the cycled sample at 400 °C the transformation behavior was similar to the non-thermal cycled alloy. It was concluded that the main reason for the multi-stage phase transition induced by the thermal cycles was the phase hardening.
AB - Usually a multi-stage martensitic transformation is observed in Ni-rich TiNi alloys after heat treatment at 350-500 °C. It is due to the internal stresses created by the Ni4Ti3 participate. In the present work it was found that the multi-stage martensitic transformation appeared in Ti-50.0 at.% Ni alloy after thermal cycles through the temperature range of the phase transitions. Annealed sample undergoing one-stage phase transition was subjected to 32 thermal cycles in the DSC apparatus. The results had shown that three-stage forward martensitic transformation observed after 32 thermal cycle was due to the B2 → R, B2 → B19′ and R → B19′ phase transitions. It was found that the B19′ phase obtained from the B2 phase underwent the reverse transformation at higher temperatures than the B19′ phase obtained from the R phase. After annealing the cycled sample at 400 °C the transformation behavior was similar to the non-thermal cycled alloy. It was concluded that the main reason for the multi-stage phase transition induced by the thermal cycles was the phase hardening.
KW - Calorimetry
KW - Metals and alloys
KW - Phase transitions
UR - http://www.scopus.com/inward/record.url?scp=70350090828&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2009.06.132
DO - 10.1016/j.jallcom.2009.06.132
M3 - Article
AN - SCOPUS:70350090828
VL - 486
SP - 304
EP - 308
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
IS - 1-2
ER -
ID: 35628350