The high and very cycle fatigue (VHCF) properties of ultrahigh-strength Ck45M steel processed by thermomechanical rolling integrated direct quenching were investigated. S–N tests with smooth small drilled holes containing specimens as well near-threshold crack growth measurements performed up to 2 × 1010 cycles using ultrasonic-fatigue testing technique. strength is mainly determined the size n...

Reasonable regulation of nonmetallic inclusions in steel can significantly improve its strength, toughness, and corrosion resistance. In this paper, EH420 marine was treated with Mg, Ce, Mg-Ce to modify the inclusions. The effects different treatments on morphology, composition, size distribution, induced intragranular ferrite (IGF) nucleation, pitting resistance were systematically analyzed us...