Understanding Mechanical Properties of Nano-Grained Bainitic Steels from Multiscale Structural Analysis

Abstract

Steel components working in extreme conditions require materials presenting the highest performances. Nowadays, nanoengineering is being applied to the development of ultra-high strength steels as a key-enabling technology in the steel sector. The present article describes the multiscale structure of nano-grained steels designed using atomic transformation theory and processed by a simple heat treatment. Outstanding mechanical properties for these novel steels are reported, and strain-hardening mechanisms are discussed.

Keywords

• steel
• bainite
• ultra-high strength
• ductility
• in-use properties