Effect of bending speed on springback and thinning behavior of commercially pure titanium sheets under V-bending
Year: 2025
Type: article
Abstract: This study investigates the influence of bending speed on the springback and thinning behavior of pure titanium sheets, with a particular focus on microstructural evolution during bending. To evaluate these effects, V-bending tests were performed at bending speeds of 1, 10, and 100 mm/min, which approximately correspond to strain rates of 1.3 × 10 -4 , 1.3 × 10 -3 , and 1.3 × 10 -2 s −1 , respectively. The results reveal that increased bending speed leads to greater springback. During bending, plastic deformation initiates from both the inner and outer surfaces of the sheet and gradually penetrates toward the mid-thickness. However, this penetration is increasingly suppressed as the bending speed rises, resulting in the formation of a thick, deformation-free middle zone. This undeformed middle zone enhances elastic recovery and intensifies springback. On the other hand, faster bending promotes more uniform thickness reduction across the sheet, thereby mitigating localized thinning. These findings highlight a trade-off between minimizing springback and achieving uniform thickness, underscoring the complexity of simultaneously optimizing both parameters in the forming of pure titanium sheets. This study offers valuable insights for improving the precision and efficiency of titanium sheet forming processes.
Source: Materials & Design
Authors: Jong Un Lee, Yong Taek Hyun, Jong Sup Lim, Eun Young Kim, Jong Woo Won
Institution: Korea Institute of Materials Science
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,650
Award: G639214342
OpenAlex ID: W4411261367