Hydrogen‐Induced Improvement of the Cylindrical Drawing Properties of a Ti–22Al–25Nb Alloy

As an important method for improving the plasticity of titanium alloys, the “hydrogen (H)‐induced plasticization” mechanism has been widely studied. The present study comparatively investigates the high‐temperature tensile properties, deformation mechanism, and cylindrical drawing properties of hydrogenated and non‐hydrogenated Ti–22Al–25Nb alloys. The results indicate that the “H‐induced plasticization” effect is the most obvious at 0.2 wt% hydrogenation. At 960 °C, the elongation percentage of the 0H alloy is 109% and the elongation percentage of the 0.2H alloy is 202%. Through a cylindrical drawing test, it is found that after hydrogenation, the forming performance of the alloy improved significantly. The 0.2 wt% hydrogenation facilitated the dynamic recrystallization process of the alloy at 960 °C. The cylindrical drawing‐forming ability of the alloy increased significantly after adding 0.2 wt% H to the alloy, and no wrinkles are observed in this work piece.