Srivastava, Vinod Kumar (1974) An examination of the role of oxygen in the wear of ferrous alloys. Doctoral (PhD) thesis, Memorial University of Newfoundland.
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The wear of SAE 1080 steel under the conditions of unlubricated sliding is studied. The ranges of normal force and speed are 295-980 N and 0.193-1.544 m/s respectively. The specimen configuration adopted is of two coaxial hollow cylinders, 18.42mm mean diameter, rubbing at their annular end faces 2.54mm wide. -- The environment of the rubbing surfaces is controlled by forcing air or oxygen-argon mixture between the specimens. The vibration in the machine is measured. -- Wear debris particles are identified by x-ray diffraction and their size distribution determined. Wear surfaces are studied on an Optical and a Scanning Electron Microscope. -- It appears likely that wear rate is governed by oxidation of an area at a little distance from the hot spot. A correlation has been found between the sliding speed which in turn affects the surface temperature with the wear rate. The surface topography is shown to be a function of speed. -- In an environment of inert gas, the wear is of a severe type. When different mixtures of oxygen and argon gas are forced through the specimens, a significant change in the wear rate is observed. -- The difference in mean temperature of the two rubbing specimens influences the wear rate. The specimen at higher temperature shows lower wear rate.
|Item Type:||Thesis (Doctoral (PhD))|
|Additional Information:||Bibliography: leaves 217-221.|
|Department(s):||Engineering and Applied Science, Faculty of|
|Library of Congress Subject Heading:||Fretting corrosion; Steel alloys; Iron alloys|
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