Delayed fracture stress thresholds degraded by the shear punching process in ultra-high-strength steel sheets: Analysis using an in-plane bending test with numerical assimilation

• Main Authors: Matsuno, Takashi, Ueda, Yuya, Takahashi, Tomoya, Hama, Takayuki, Hojo, Tomohiko, Shibayama, Yuki, Muhamad, Mohd Ridha, Okitsu, Yoshitaka, Takamura, Masato
• Format: Article
• Published: Elsevier 2024
• Subjects: TJ Mechanical engineering and machinery; TS Manufactures
• Online Access: http://eprints.um.edu.my/45146/; https://doi.org/10.1016/j.jmapro.2024.04.013

This study established delayed fracture stress thresholds for punched surfaces of two ultra-high-strength steel sheets, JSC1180Y and 22MnB5. Punched surfaces exhibit deterioration in ductility and high residual stresses, thereby lowering delayed fracture thresholds. Consequently, identifying such de...