ASTM G133 PDF
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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This test method encompasses both unlubricated and lubricated testing procedures. Report the standard deviation.
Work Item s – proposed revisions of this standard. As is often the case for wear tests, the within-laboratory repeatability is better than the between-laboratory reproducibility. This avoids making the assumption that the wear rate was constant during the test. Referenced Documents purchase separately The documents listed below g1333 referenced within the subject standard but are not provided as part of the standard.
ASTM G – 05() – Standard Test Method for Linearly Reciprocating Ball-on-Flat Sliding Wear
G — 02 and root-mean-square surface roughness. A small, shallow annulus surrounding the elastically deformed area may give the impression of wear, whereas little or no appreciable wear has actually occurred. The procedure appropriate for the given materials and test severity should be selected.
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? Originally approved in This variation is to be expected. It is possible that during mounting, some contamination was inadvertently placed on them, and this? Test loads and speeds are to be determined by the severity of the proposed application or purpose of the testing.
If friction force remains steady throughout the test or quickly reaches a steady state, one nominal value may be sufficient, otherwise, the type of frictional data reported will depend on the overall trends observed during the test. The friction coefficient data Table X1.
Surface roughnesses of 0. Linear wear friction test reproduces the linear reciprocating motion found in many real-world tribology mechanisms. Becoming Compliant with the MDRs: Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above g13 or at phonefaxor service astm.
Warning—For lubricated tests in which there is minimal wear, it is possible to be satm in reading the apparent wear scar diameter of the ball tip optically because of elastic recovery. In this test method, the load is applied vertically downward through the ball against the horizontally mounted flat specimen.
ASTM G133 – 05(2016)
Test parameters to be reported should conform with either Procedure A or B. It should therefore not be assumed that the same relative wear volumes would be obtained if materials for ball and?
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Wear volume of the? To measure the wear, it is necessary to clean the specimens in such a way that the surface features are not altered. A statement such as the following may then be used: NOTE 2—This procedure requires full-immersion lubrication. For liquid-lubricated specimens, ultrasonic cleaning in a suitable solvent may be used. Subscribe to our Newsletter and stay updated!
If neither procedure in 8. The normal load, stroke length, frequency and type of oscillation, test temperature, lubricant if any sstm, test duration, and atmospheric environment including relative humidity range are selected from one of two procedures. Eight replicate tests were performed in one laboratory to evaluate the repeatability of this procedure.
Additional guidelines for reporting data are found in Guide G A fresh supply of lubricant shall be used for each test unless the objective is to evaluate the effects of used lubricants on friction and wear. The ball holder should be rigid enough so that the periodic reversal in the sliding direction does not result in tilting or other misalignment of the contact. The ball specimen experiences nominally constant contact, whereas the?
If procedures other than A or B are used, the report should explicitly state so, listing the conditions which are different than those described in 8.
ASTM G – 05() Standard Test Method for Linearly Reciprocating Ball-on-Flat Sliding Wear
UMTs offer interchangeable modules and the ability to program and control the application of complex forces and motions through servo-control. The following equation may be used: Friction forces are recorded for both forward and backward movements of the stroke. Similarly, any slippage of the?