New Approach to Evaluation of Formability of Higher-Strength Steel Strips

• Main Authors: Buršák, M., Mamuzić, I., Micheľ, J.
• Format: Article
• Language: English
• Published: Croatian Metallurgical Society 2007-01-01
• Series: Metalurgija
• Subjects: strain rate; formability; deep-drawability; cupping test; steel sheets
• Online Access: http://public.carnet.hr/metalurg/Metalurgija/2007_vol_46/No_1/MET_46_1_037_040_Bursak.pdf

The paper analyses the material characteristics of deep-drawability of steel sheets with the thickness from 1 to 1,8 mm, the yield point above 330 MPa and the loading rate up to 150 m/min. The analysis resulted in the finding that with the loading rate up to ca 10 m/min the formability characteristics slightly increase and after exceeding this value these characteristics significantly decrease. In practice, the strain rates are below 1 s–1, therefore the material characteristics determined using standard tests can be used to determine the limit states up to the above-mentioned rate.