The linear wear test, ASTM G, reproduces the linear reciprocating motion found in many real-world tribology mechanisms. ASTM G – Designation: G – 02 Standard Test Method for Linearly Reciprocating Ball-on-Fla. ASTM G – – Download as PDF File .pdf), Text File .txt) or read online. ASTM G –
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The wear resulting from this mode of movement may differ from that experienced by the same materials sliding continuously in only one direction unidirectional sliding even for comparable durations of contact. Either of two sets of testing conditions designated Procedures A and B aztm be used. A flat, pin or ball tip is loaded onto a test sample with a precise weight.
Commercial designations for materials should be given, if applicable. New fuel cell concept brings biological design to better electricity G — 02 and root-mean-square surface roughness.
Test Number 1 2 3 4 5 6 7 8 Friction Coefficient,? One indirect indication that wear rate may be changing is a signi? The manner in which the velocity varies with time is determined by the design of the mechanism which drives the ball or?
This variation is to be expected. A commercial version of this machine is available with a signal conditioner to rectify, ast output the root-mean-square friction force to a strip-chartrecorder or to a computerized data acquisition system. Two wear tests were performed on each?
ASTM G – 05() Standard Test Method for Linearly Reciprocating Ball-on-Flat Sliding Wear
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. The principal quantities of interest are the wear volumes of the contacting ball and flat specimen materials; however, the coefficient of kinetic friction may also be measured using the method described. If a lubricant is used, provide its commercial name or other description, and any other properties needed to identify the source and traceability of the lubricant.
G — 02 friction forces generated during sliding. If a cycle-counter is available, this may be used instead of the timer, in which case Eq 2 will be used. Photomicrographs of the scars should be included, if available.
This test method encompasses both unlubricated and lubricated testing procedures. Ashm the normal force to recheck the zero point on g13 friction force recording system.
Tests include evaluation of base materials, heat-treated parts, surface coatings, gg133 lubricants. The ball wear volume was not reported because the scars on the balls were not?
ASTM G – 05() – Standard Test Method for Linearly Reciprocating Ball-on-Flat Sliding Wear
The primary criterion is that the atm present a? It should therefore not be assumed aetm the same relative wear volumes would be obtained if materials for ball and? The friction coefficient data and? Originally approved in Information shall be sufficient to establish their source, chemical composition, processing history, surface treatment, 5 5 Whitenton, E. Friction coefficient is accurately measured during the test by the deflection of, the easy and quick to calibrate, load cell.
It is possible that during mounting, some contamination was inadvertently placed on them, and this? Astk 2—This procedure requires full-immersion lubrication.
It is often useful in analyzing test results to note the magnitudes and durations of any observed friction transitions. UMTs offer interchangeable modules and the ability to program and control the application of complex forces and motions through servo-control. Diamond, WC, Rubber and many other materials: For unlubricated tests, a concentrated jet of air may be used to dispel the debris from the worn area of the specimens.
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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Use of a spherical tip alleviates the alignment problems associated with?
g1333 The coefficient of variation of the wear volume of the? One of the most common tests for wear on these kinds of parts is the ballon-flat sliding wear test as defined in ASTM G Warning—It is not recommended that continuous wear depth data obtained from position-sensing gages be used because of the possible complications arising from entrapped debris, thermal expansion due to frictional heating, hydrodynamic lift, and tribochemical?
For more information, Click Here. In a polished condition, the surface should be as free as possible from preparation artifacts such as grinding-induced cracks, gross grinding marks, and grain pull-out.
To compute the sliding distance in metres or satm of cycles, use the following: This test method encompasses both unlubricated and lubricated testing procedures. Link to Active This link will always route to the current Active version of the standard.
The principal quantities of interest are the wear volumes of the contacting ball sstm