Effect of Low-energy Electromagnetic Shock Treatment on Impact Fracture Process of TC11 Titanium Alloy

The effects of low-energy electromagnetic shock treatment (EST) on the impact toughness of TC11 titanium alloy and its influence on the fracture behavior during impact were investigated. Annealed TC11 titanium alloy specimens were subjected to EST under different peak current density conditions, and their impact toughness was evaluated using Charpy impact tests. The results demonstrate that when the maximum surface temperature of the specimen remains below 160 ℃, both the peak load and total absorbed energy increase with the increase of peak current density. Specifically, at a peak current density of 132.6 A/mm², the impact toughness increases the most, which increases by 37.4%. EST promotes interfacial bridging and coarsening of αp-phase grains in the TC11 titanium alloy, which collectively influences the crack initiation and propagation process, thereby enhancing the material's impact toughness.