The bores of many cannon tubes are electroplated with chromium. This is done to provide better resistance to erosion and wear and, in the case of naval guns, to provide corrosion resistance as well. The resistance of chrome plate to erosion and wear is so good that there is little or no wear of the bore until the chromium begins to spall off the steel substrate. In the present research the effects of various factors on the durability of the plate were investigated using a geared roller test machine. It was found that the important stress is the shear stress in the plane normal to the direction of rolling rather than the maximum shear stress; this corresponds to the maximum shear strain. This result has application to the subcase fatigue or 'case crushing' failure of case-hardened years. The failure on repeated loading was found to be in the substrate steel immediately below the interface rather than at the interface itself. (Kursetz)
Factors influencing the durability of chrome plate
Einflussfaktoren der Bestaendigkeit von Chromplattierungen
Wear of materials 1979. ASME int. conf. ; 437-440
1979
4 Seiten, 7 Bilder, 5 Quellen
Conference paper
English
Factors influencing the durability of chrome plate
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