|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Digital Image Correlation (DIC) Analysis of Temperature and Strain Rate Influence on the Serrated Flow Behaviour of High-Mn Steels
||Sebastian Wesselmecking, Liudmila Tataurova, Wolfgang Bleck
|On-Site Speaker (Planned)
Due to increasing demand for lightweight design in the automotive industry, high-Mn steels are receiving extended attention as they combine high strength with outstanding plasticity. The inhomogeneous deformation behavior, called dynamic strain aging(DSA), in a characteristic temperature range depicts a potential drawback in context of industrial production. This study presents a systematic investigation of DSA during tensile tests. DIC is used to analyse the characteristic propagation of deformation bands. Local strain rate is used predicting width and velocity of the bands. To identify the influence of C, Mn and Al on DSA, different alloying concepts are investigated. Temperature and strain rate are varied to analyse the serration characteristics under changing process parameters. The correlation between strain rate sensitivity and alloying design is determined. Band velocity and onset of bands significantly vary with changing C, Mn and Al contents. An upper temperature limit was found for the appearance of serrated flow.
||Planned: Supplemental Proceedings volume