ASAZUMA Akari, a first-year master’s student at the Mechanical Engineering Program of the Graduate School of Science and Technology (member of Associate Professor ARIKAWA Shuichi’s Materials System Lab), received the Young Researcher Award at the 55th Symposium on Stress-Strain Measurement and Strength Evaluation, hosted by the Japanese Society for Non-Destructive Inspection. The event took place at the Kameido Culture Center on January 11, 2025.
Award winner: ASAZUMA Akari
Presentation title: Effect of ultrasonic vibration on kinetic state of atoms in the vicinity of screw dislocations in BCC iron
Content: The softening of metals under ultrasonic vibration is a known phenomenon, but its underlying mechanism remained unexplained. The research conducted was to reveal the mechanism through molecular dynamics simulations. After clarifying the mechanism of crystal defects in metals, known as edge dislocations, the presenter then focused on screw dislocations, which have a significantly different structure, and revealed that atoms in the vicinity of these crystal defects absorb energy from ultrasonic vibration.