Grooves in scratch testing
Autor: | Witold Brostow, Wunpen Chonkaew, Lev Rapoport, Yakov Soifer, Armen Verdyan |
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Rok vydání: | 2007 |
Předmět: |
chemistry.chemical_classification
Materials science Mechanical Engineering Polymer Tribology Condensed Matter Physics chemistry Mechanics of Materials Scratch Vickers hardness test General Materials Science Profilometer Composite material Exponential decay Groove (engineering) computer computer.programming_language |
Zdroj: | Journal of Materials Research. 22:2483-2487 |
ISSN: | 2044-5326 0884-2914 |
Popis: | For a number of polymers with a variety of chemical structures and different properties, we have performed scratch-resistance tests and investigated the profiles of the grooves formed using a profilometer. Three main kinds of material response are seen: plowing; cutting; and densification. The cross-sectional areas of the grooves include the groove and side top-ridge areas. The latter are smaller than the former, an indication of densification at the bottom and the sides of the groove; the effect can be connected to molecular dynamics simulations of scratch testing. The sum of the groove and top-ridge areas is the highest for Teflon, thus providing another measure of its poor scratch resistance. The Vickers hardness of the polymers was also determined. An approximate relationship exists between the hardness and the groove area. An unequivocal relationship between the hardness and the total cross-sectional area of the material displaced by the indenter is found. The resulting curve can be represented by an exponential decay function. |
Databáze: | OpenAIRE |
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