Maashaa, D., Agvaantseren, T., Narmandakh, B., Vasili Vasilievich Rubanik and Vasili Vasilievich Rubanik Jr. 2022. THE INFLUENCE OF ULTRASOUND ACTIVATION ON MICROSTRUCTURE AND HARDNESS OF POROUS Ni-Ti SHAPE MEMORY ALLOYS. World Science. 5(77) (Sep. 2022). DOI:https://doi.org/10.31435/rsglobal_ws/30092022/7863.