"Worn out" redirects here. For the painting by Vincent van Gogh, see At Eternity's Gate.
Damaging, gradual removal or deformation of material at solid surfaces
v
t
e
Mechanical failure modes
Buckling
Corrosion
Corrosion fatigue
Creep
Fatigue
Fouling
Fracture
Hydrogen embrittlement
Impact
Liquid metal embrittlement
Mechanical overload
Metal-induced embrittlement
Stress corrosion cracking
Sulfide stress cracking
Thermal shock
Wear
Yielding
Rear (driven) bicycle sprockets. New, left, shows no wear. Right, used, shows obvious wear from being driven clockwise.
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.[1] Abrasive wear alone has been estimated to cost 1–4% of the gross national product of industrialized nations.[2]
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.[3] This process may occur by contact with other metals, nonmetallic solids, flowing liquids, solid particles or liquid droplets entrained in flowing gasses.[4]
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.[5] Depending on the tribosystem, different wear types and wear mechanisms can be observed.
^Cite error: The named reference :0 was invoked but never defined (see the help page).
^Davis, J. R. (2001). Surface engineering for corrosion and wear resistance. ASM International. p. 56. ISBN 0-87170-700-4. OCLC 1027005806.
^Akchurin, Aydar; Bosman, Rob; Lugt, Piet M.; Drogen, Mark van (2016-06-16). "Analysis of Wear Particles Formed in Boundary-Lubricated Sliding Contacts". Tribology Letters. 63 (2): 16. doi:10.1007/s11249-016-0701-z. ISSN 1023-8883.
^Popov, Valentin L. (2018). "Is Tribology Approaching Its Golden Age? Grand Challenges in Engineering Education and Tribological Research". Frontiers in Mechanical Engineering. 4. doi:10.3389/fmech.2018.00016.
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....
Tyne and Wear (/ˌtaɪn ... ˈwɪər/) is a ceremonial county in North East England. It borders Northumberland to the north and County Durham to the south...
What Not to Wear may refer to: What Not to Wear (UK TV series), British makeover reality television series What Not to Wear (U.S. TV series), American...
Wear OS (also known simply as Wear and formerly Android Wear) is a version of Google's Android operating system designed for smartwatches and other wearables...
Formal wear or full dress is the Western dress code category applicable for the most formal occasions, such as weddings, christenings, confirmations, funerals...
youth, probably just wasted on the young", commonly known by the title "Wear Sunscreen", is an essay written as a hypothetical commencement speech by...
Informal wear or undress, also called business wear, corporate/office wear, tenue de ville or dress clothes, is a Western dress code for clothing defined...
Wearable may refer to: Clothing Wearable technology Wearable computer Activity tracker This disambiguation page lists articles associated with the title...
Wear leveling (also written as wear levelling) is a technique for prolonging the service life of some kinds of erasable computer storage media, such as...
A Wear was a chain of women's clothing stores with a wide number of operations across Ireland. The brand also operated internationally through its website...
Wear and tear is damage that naturally and inevitably occurs as a result of normal wear or aging. It is used in a legal context for such areas as warranty...
Casual wear (or casual attire or clothing) is a Western dress code that is relaxed, occasional, spontaneous and suited for everyday use. Casual wear became...
Wearable art, also known as Artwear or "art to wear", refers to art pieces in the shape of clothing or jewellery pieces.: 12 These pieces are usually...
Western wear is a category of men's and women's clothing which derives its unique style from the clothes worn in the 19th century Wild West. It ranges...
Walker Wear (November 27, 1876 – June 4, 1941) was an American tennis player who competed in the 1904 Summer Olympics. He was the son of James H. Wear and...
Tooth wear refers to loss of tooth substance by means other than dental caries. Tooth wear is a very common condition that occurs in approximately 97%...
The wear coefficient is a physical coefficient used to measure, characterize and correlate the wear of materials. Traditionally, the wear of materials...
In machining, tool wear is the gradual failure of cutting tools due to regular operation. Tools affected include tipped tools, tool bits, and drill bits...
A wearable computer, also known as a body-borne computer, is a computing device worn on the body. The definition of 'wearable computer' may be narrow...
"Fairies Wear Boots" is a song by the English heavy metal band Black Sabbath, appearing on their 1970 album Paranoid. On original 1970 US copies of the...
The Archard wear equation is a simple model used to describe sliding wear and is based on the theory of asperity contact. The Archard equation was developed...
National Wear Red Day is a day in February when many people wear red to show their support for the awareness of heart disease. In the US, National Wear Red...
Travis James Wear (born September 21, 1990) is an American former professional basketball player. He began his pro career with the New York Knicks after...
members attending formal events may wear the order's collar over their military uniform, formal day dress, or evening wear. When collars are worn (either on...
The Tyne and Wear Metro is an overground and underground light rail rapid transit system serving Newcastle upon Tyne, Gateshead, North Tyneside, South...
Global Information