|About this Abstract
||2010 TMS Annual Meeting & Exhibition
||General Abstracts: Structural Materials Division
||S-N Fatigue and Fatigue Crack Propagation Behaviors of High Manganese Steels
||Jaeki Kwon, Sanguk Jin, Sangshik Kim
|On-Site Speaker (Planned)
Austenitic manganese steels with more than 13% manganese addition have been gathering a great interest particularly in ship-building and architectural industries due their excellent mechanical properties and weldability. Despite the interest, fatigue behavior of high manganese steels, including microstructural influences and fatigue crack initiation mechanism, have not been well established. In this study, uniaxial S-N fatigue and fatigue crack propagation (FCP) behaviors of high manganese steels were studied and the results were compared to those of TMCP steels with similar yield strengths. The present high manganese steels showed enhanced resistances to FCP in low stress intensity factor regime. Abnormally high resistance to S-N fatigue was observed for the high manganese steels in high and intermediate stress ranges probably due to extremely high strain hardening. Mechanism(s) associated FCP and S-N fatigue for high manganese steels were discussed based on detailed SEM micrographic and fractographic observations.
||Definite: A CD-only volume