|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Advanced High Strength Steels IV
||Strength and Toughness of Nano-structured Pearlite
||Kushal Mishra, Vaibhav Khiratkar, Aparna Singh
|On-Site Speaker (Planned)
Nano-structured pearlitic steels are extremely strong with significant amount of ductility. This is because of the extremely fine ferrite-cementite lamellar structure that hinders dislocation motion effectively due to insufficient pile-up in the refined ferrite structure. Prior studies have shown a decrease in toughness with lamellae refinement in pearlite and a subsequent increase as the the spacing reaches around 200 nm. Fracture toughness and fatigue life of pearlite with lamellar spacing below 100 nm have been investigated and the crack growth characteristics as a function of the microstructure have been examined using post-martem scanning electron microscopy studies. A combination of high strength, fracture toughness and higher fatigue crack growth life has been achieved by decreasing the lamellar spacing in pearlite.
||Planned: Supplemental Proceedings volume