Résumé

During pulsed-field magnetization (PFM), high-temperature superconducting (HTS) bulks are subjected to significant mechanical stresses due to rapid changes in magnetic flux (Lorentz force) and temperature (thermal stress), potentially leading to mechanical failures. This is particularly emphasized by the inherent fabrication-induced defects such as cracks, grain boundaries, and pores. These defects often result in non-uniform trapped magnetic fields that can strongly impact the HTS perfor- mance. The present study focuses on the impact of porosity on the trapped magnetic field, temperature, and mechanical stress of REBCO bulks through a 2D transient multiphysics finite element model (FEM).