Repairing Mechanism of Fatigue Defects in TiB/Ti‐6Al‐4V Titanium Matrix Composite via Electroshock Treatment

Titanium matrix composites (TMCs) can be used in some important industrial fields, and they are easy to generate the defects during loading. It is significant to modify the microstructure and repair the defects. In this article, the microstructure of secondary α (α s ) phase precipitated from the β phase via electroshock treatment (EST) in TiB/Ti‐6Al‐4V. The orientation of α phase and TiB varied, the maximum texture intensity of α phase decreased, and the orientation became more uniform. The maximum texture intensity of TiB increased. After EST, the yield strength of TiB/Ti‐6Al‐4V increased by 1345.7 MPa, the compressive fracture strain is 20.5%, and the hardness value is 420.4 HV. During the process of fatigue failure, the tips of TiB are easy to form micropores and defects. However, the fatigue defects can be repaired by EST, and the volume rate of repairing defects reached 73.94%–82.17%. All results indicate EST is an efficient method to repair defects and improve mechanical properties of TMCs.