Deformation-induced martensitic transformation as the basis of a hardening process is dependent, among others, on stress state. In applications such cryogenic cutting, where hardened subsurface can be produced in metastable austenitic steels, different states exist. Furthermore, cutting typically occurs at high strain rates greater than 103s?1. order to gain deeper insight into behavior steel (...

Evolution of shear deformation in steel with the structure tempered martensite was studied under active tension. Purpose work to identify patterns development at scale-structural levels: package, plate, fragment a package and lath. The authors investigated relief formed different stages plastic by optical, transmission scanning electron microscopy. Quantitative characteristics were measured: st...

In this work, different heat treatments were performed in order to study two bainite morphologies, granular and lath-like, obtained at cooling rates a low carbon microalloyed steel. For that purpose, advanced crystallographic characterization quantitative metallography using SEM, EBSD TEM carried out. The evolution of the volume percentage, size, aspect ratio, retained austenite percentage crys...

Lath martensite is a complex hierarchical compound structure that forms during rapid cooling of carbon steels from the austenitic phase. At smallest, i.e., ‘single crystal’ scale, individual, elongated domains, form elemental microstructural building blocks: name-giving laths. Several laths nearly identical crystallographic orientation are grouped together to blocks, in which–depending on exact...

Abstract The deployment of Press Hardened Steels (PHSs) in the Body-In-White structures that took place during two last decades is at origin a breakthrough weight saving on vehicles while guaranteeing safety requirements automotive industry. production parts with complex shapes and high strength between 1500-2000MPa was made possible by taking advantage hot rheology austenite combined fast cool...