THE INFLUENCE OF ULTRASOUND ACTIVATION ON MICROSTRUCTURE AND HARDNESS OF POROUS Ni-Ti SHAPE MEMORY ALLOYS. World Science, [S. l.], n. 5(77), 2022. DOI: 10.31435/rsglobal_ws/30092022/7863. Disponível em: https://rspublisher.org/index.php/ws/article/view/2363. Acesso em: 17 mar. 2026.