The influence of temperature and loading frequency on contact fatigue of 20KhN3A and ShKh15 steels under aggressive media effect - B. P. Chaikovskyi; V. I. Kyryliv; V. R. Dutka; B. R. Tsizh; O. V. Maksymiv; B. M. Mykychak; Ya. Sydor (Materials Science (Physicochemical mechanics of materials), 2019)