Work-Hardening Behavior of Cold Rolled Interstitial-Free Steel Sheet and Dual Phase High Strength Steel Sheets Subjected to Two-Stage, Coaxial and Non-Coaxial Tension/Compression

Abstract:

In-plane tension/compression tests of a cold rolled interstitial-free (IF) steel and sheet a 980MPa dual phase high strength steel sheet (980DP) were carried out to investigate the work-hardening behavior under two-stage loading paths. The two-stage loading paths consist of the uniaxial tension/compression for the rolling direction (RD) followed by unloading and subsequent uniaxial tension/compression in the 0°, 45° and 90° directions from the first loading direction (0°-, 45°- and 90°-loading). The work hardening behavior in the second loading was different between the 980DP and the IF steel. It was found that the work hardening behaviors were significantly affected by the inner product of the strain rate mode tensors for the first and second loading and that the effect of the deformation mode (tension/compression) was small.

• Periodical: Key Engineering Materials (Volumes 651-653)
• Pages: 83-88
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.651-653.83
• Online since: July 2015
• Authors: Satoshi Shirakami*, Shigeru Yonemura, Tohru Yoshida, Noriyuki Suzuki, Toshihiko Kuwabara
• Keywords: Bauschinger Effect, Cross Hardening, Dual Phase High Strength Steel Sheet, Interstitial-Free Steel Sheet, Strength Differential Effect, Tension/Compression, Two-Stage Strain Path Test

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