Effects of Ni and Mn on the Cavitation Erosion Resistance of Fe–Cr–C–Ni/Mn Austenitic Alloys

Author： Park Myung Kim Ki Shin Gyeong Yun Jae Shin Min Kim Seon

ISSN： 1023-8883

Source： Tribology Letters, Vol.52, Iss.3, 2013-12, pp. : 477-484

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Abstract

The effects of Ni and Mn concentrations on the cavitation erosion behavior of Fe–12Cr–0.4C–xNi/Mn (x = 5, 7, and 10) alloys were investigated with respect to strain-induced γ → α′ and γ → ε phase transformation. The cavitation erosion resistance of the Ni-added alloys decreased with increasing Ni concentration, whereas that of the Mn-added alloys improved with increasing Mn concentration. Also, the 7Mn-added alloy and 10Mn-added alloy, which additionally underwent the γ → ε phase transformation, had better resistance to cavitation erosion than the 5Mn-added alloy in which the γ → α′ phase transformation occurs most actively. These behaviors were considered to be due to the fact that the strain-induced ε martensite absorbs the cavity collapse energy and prevents the damage by cavitation erosion more effectively than the strain-induced α′ martensite.