Effects of sigma phase and carbide on the wear behavior of CoCrMo alloys in Hanks' solution
作者： Yan Chen , Yunping Li , Shingo Kurosu , Kenta Yamanaka , Ning Tang
DOI: 10.1016/J.WEAR.2013.12.010
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摘要: Abstract This study aims to elucidate the synergy effects of σ phase and carbide on wear behavior low-carbon (LC) high-carbon (HC) cobalt–chromium–molybdenum (CoCrMo) alloys, by using pin-on-disc tests under Hanks' lubricated conditions. Fractured or torn-off σ-phase precipitates were observed be main reason for abrasion both LC HC alloys. Carbides torn off at initial high contact pressure form pitting; around pitting uprooted led micro cracks, which is considered as surface fatigue alloy. In contrast, strain-induced martensite worn was contributed increase hardness resistance
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