The microstructure and mechanical properties of X70 pipeline steel with a ferrite/martensite dual-phase produced by thermo-mechanical controlled processing were investigated tensile tests, Charpy V-notched (CVN) impact drop-weight tear guided-bend scanning electron microscopy transmission combined thermodynamic simulation analysis. All the met strength, ductility, toughness deformability requir...

Friction stir welding is a solid-state joining/processing technique that offers high strength and productivity, resulting in microstructure similar to hot working cycles. However, melting temperature metals such as steels cause excessive wear over tools, representing significant economic issue. Most studies conducted have used polycrystalline cubic boron nitride (PCBN) W-Re composite which offe...