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wear

Wear is the damaging, gradual removal or deformation of material at solid surfaces. Causes of wear can be mechanical (e.g., erosion) or chemical (e.g., corrosion). The study of wear and related processes is referred to as tribology.
Wear in machine elements, together with other processes such as fatigue and creep, causes functional surfaces to degrade, eventually leading to material failure or loss of functionality. Thus, wear has large economic relevance as first outlined in the Jost Report. Abrasive wear alone has been estimated to cost 1-4% of the gross national product of industrialized nations.Wear of metals occurs by plastic displacement of surface and near-surface material and by detachment of particles that form wear debris. The particle size may vary from millimeters to nanometers. This process may occur by contact with other metals, nonmetallic solids, flowing liquids, solid particles or liquid droplets entrained in flowing gasses.The wear rate is affected by factors such as type of loading (e.g., impact, static, dynamic), type of motion (e.g., sliding, rolling), temperature, and lubrication, in particular by the process of deposition and wearing out of the boundary lubrication layer. Depending on the tribosystem, different wear types and wear mechanisms can be observed.

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  1. P

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  2. P

    Running pipe INSIDE floorboard?

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  3. T

    Wear And Tear Causing Leaks?

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  4. H

    Newbie from tyne & wear

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  5. Gazzt

    New work wear range lol, ministry of defence approved

    Customer won't know your there
  6. W

    Anyone wear gloves for ALL work and find it no hinderance?

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  7. L

    Branded work wear

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  8. V

    Work Wear Providers

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  9. W

    Wear gas mask to remove silicone sealant?

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  10. L

    Today, I felt the need to wear my RNLI yellows in a custards kitchen :)

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  11. A

    What watch do you wear from day to day

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  12. M

    you who wear kilts....

    Have you seen 'angels share'? My wife wants to watch it. I said we willny understand it
  13. S

    what do you wear to work

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  14. M

    Where's the best place to get gas safe work wear?

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  15. 3

    All plumbers should wear this in the summer. Cracked me up

  16. S

    Diary soft wear

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  17. M

    newbie from tyne and wear

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  18. T

    Plumber needed - Tyne & Wear

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