Speaker
Description
Pure titanium ultra-thin strips have extensive applications in the aerospace, new energy, and electronic communication industries. However, pure titanium exhibits poor formability at room temperature and high deformation resistance; conventional cold rolling processes for producing pure titanium ultra-thin strips face challenges such as significant work hardening, limitations on rolling thickness and excessive residual stress. In this study, a pulse current-assisted rolling process was employed, utilizing the synergistic effects of the thermal and non-thermal effects of the pulse current to improve formability. Using TA1 pure titanium ultra-thin strips as the research subject, an experimental platform was established on a twelve-high rolling mill to systematically investigate the effects of parameters such as current magnitude, frequency and duty cycle on the material’s rolling deformation behavior, microstructure and mechanical properties. The results indicate that, compared to conventional cold rolling, pulse current-assisted rolling can effectively reduce deformation resistance, increase the rolling reduction rate, and suppress edge cracking defects; the pulse current promotes dislocation slip and dynamic recovery, attenuates the rolling texture, reduces anisotropy, and improves the uniformity of deformation in ultra-thin strips. Under equivalent deformation conditions, the pure titanium ultra-thin strips produced by this process maintain high strength while exhibiting an elongation after fracture approximately 15%~35% higher than that of conventionally cold-rolled strips, demonstrating a favorable strength-ductility balance. Pulse current-assisted rolling offers a new technical approach for the production of high-performance pure titanium ultra-thin strips.
| Speaker Company/University | Taiyuan University of Technology |
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