Fretting Wear

Fretting Wear

Fretting wear is the repeated cyclical rubbing between two surfaces, which is known as fretting, over a period of time which will remove material from one or both surfaces in contact. It occurs typically in a bearings, although most bearings have their surfaces hardened to resist the problem. Another problem occurs when cracks in either surface are created, known as fretting fatigue. It is the more serious of the two phenomena because it can lead to catastrophic failure of the bearing.An associated problem occurs when the small particles removed by wear are oxidised in air. The oxides are usually harder than the underlying metal, so wear accelerates as the harder particles abrade the metal surfaces further. Fretting corrosion acts in the same way, especially when water is present. Unprotected bearings on large structures like bridges can suffer serious degradation in behaviour, especially when salt is used during winter to deice the highways carried by the bridges. The problem of fretting corrosion was involved in the Silver Bridge tragedy and the Mianus River Bridge accident.

ee also

*Bearings


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Look at other dictionaries:

  • Fretting wear — Fretting wear. См. Фрикционный износ. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • Fretting — (or fretting corrosion) refers to combined wear and corrosion damage at the asperities of contact surfaces. This damage is induced under load and in the presence of repeated relative surface motion, as induced for example by vibration. The ASM… …   Wikipedia

  • Wear — For other uses, see Wear (disambiguation). v · d · e Materials failure modes …   Wikipedia

  • Fretting — Le terme de fretting a été inventé pour décrire les phénomènes physiques particuliers d usure, déformation, oxydation, corrosion[1], fissuration, adhésion ou autres modifications physicochimique, électrochimiques et structurale de la matière… …   Wikipédia en Français

  • Fretting — Fret Fret (fr[e^]t), v. t. [imp. & p. p. {Fretted}; p. pr. & vb. n. {Fretting}.] [OE. freten to eat, consume; AS. fretan, for foretan; pref. for + etan to eat; akin to D. vreten, OHG. frezzan, G. fressen, Sw. fr[ a]ta, Goth. fra itan. See {For},… …   The Collaborative International Dictionary of English

  • wear — Synonyms and related words: abate, abide, ablate, ablation, about ship, abrade, abrase, abrasion, abrasive, act a part, affect, apparel, array, assume, atomization, attire, attrition, back and fill, bark, bate, be dressed in, be eaten away, be… …   Moby Thesaurus

  • fretting — Abrasive polishing and wear of two metallic surfaces at their interface due to repetitive motion. [M.E., fr. O.E. fretan, to devour] …   Medical dictionary

  • fretting — Synonyms and related words: ablation, ablative, abradant, abrasion, abrasive, annoying, antsy, antsy pantsy, anxiety, anxious, attrition, attritive, bothersome, breathless, breathless impatience, buffing, burnishing, chafe, chafing, detrition,… …   Moby Thesaurus

  • fretting — fret n. irritation, worry, anxiety; erosion, wearing away; area that has been eroded; ornamental design; any of the ridges of wood or metal on a fingerboard (of a guitar, lute, etc.) v. worry, annoy, irritate; get annoyed; become worried; corrode …   English contemporary dictionary

  • Фрикционный износ — Fretting wear Фрикционный износ. Износ, возникающий в результате Fretting Истирания. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

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