Sustainable Combined Process for Improving Surface Integrity and Fatigue Strength of Heat-Treated 42CrMo4 Steel Shafts and Axles. - Maximov, Jordan; Duncheva, Galya; Anchev, Angel; Dunchev, Vladimir; Anastasov, Kalin; Ichkova, Mariana (Metals (2075-4701), 2025)