J. Phys. IV France 112 (2003) 785
Influence of high intensive dynamic strain on the change of titanium nickelide acousto-elastic properties during phase transitionsN.N. Popov, A.M. Panchenko and I.V. Kostylev
Russian Federal Nuclear Center, All-Russian Scientific Research Institute of Experimental Physics (RFNC-VNIIEF), Technological Division, Pr. Mira 37, Sarov 607188 Nizhni, Novgorod Region, Russia
The change of the rate and damping of ultrasonic vibrations in low-temperature titanium nickelide alloys during phase transitions in the material initial state and after the impact of high intensive dynamic loading has been studied. It has been established that the differences in dynamics of acoustic and elastic property changes correspond to phase transitions of different types. The influence of dynamic loading in elasto-plastic strain intervals causes the increase of the scale of the given below acousto-elastic anomalies that is progressing with thé growth of load intensity: increase of elastic modulus defect and buildup of attenuation factor of acoustic waves in temperature intervals of phase transitions. The physical nature of acousto-elastic effects of titanium nickelide structural transformations has been discussed.
© EDP Sciences 2003