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Fretting Wear in Titanium, Monel-400, and Cobalt
Robert C. Bill
其他書名
25-percent Molybdenum Using Scanning Electron Microscopy
出版National Aeronautics and Space Administration, 1972
URLhttp://books.google.com.hk/books?id=uajm3yCQImQC&hl=&source=gbs_api
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註釋Damage scar volume measurements taken from like metal fretting pairs combined with scanning electron microscopy observations showed that three sequentially operating mechanisms result in the fretting of titanium, Monel-400, and cobalt - 25-percent molybdenum. Initially, adhesion and plastic deformation of the surface played an important role. This was followed after a few hundred cycles by a fatigue mechanism which produced spall-like pits in the damage scar. Finally, a combination of oxidation and abrasion by debris particles became most significant. Damage scar measurements made on several elemental metals after 600,000 fretting cycles suggested that the ratio of oxide hardness to metal hardness was a measure of the susceptibility of a metal to progressive damage by fretting.