ALWANI, Shams - Research on NiTi Shape Memory Alloys

Introduction and Objectives00:00:00

Overview of NiTi shape memory alloys, their applications in aerospace and medicine, and the challenge of performance degradation due to atomic-level damage.

Simulation Methodology00:02:21

Explanation of using LAMMPS for molecular dynamics and OVITO for visualization to study thermal, mechanical, and cyclic loading on crystalline structures.

Thermal and Mechanical Behavior00:03:21

Analysis of phase transformation energy curves during cooling and the observation of pseudo-elasticity under uniaxial compression.

Cyclic Fatigue and Dislocation Analysis00:05:17

Tracking residual strain across cycles and identifying how dislocation networks act as the microscopic origin of material fatigue and memory loss.

Impact of Precipitates and Conclusion00:07:11

Examining how nanocale precipitates increase mechanical resistance and summary of future research directions including machine learning integration.