After outlining the relative merits of rig-testing of materials compared with testing in situ the fundamental considerations in the design of the testing machine are discussed. Of basic importance is a realistic appraisal of the conditions under which the material is to be used and the subsequent incorporation of accurately simulated conditions in the experimental rig. In particular the thermal resistances in the rig should be approximately proportional to those existing in the proposed application. The paper outlines ways of measuring normal force, frictional force and wear rates and emphasizes the need to record some variables continuously.
Get full access to this article
View all access options for this article.
References
1.
CoffinL. F.Jr.‘A study of the sliding of metals with particular reference to atmosphere’, Lubrication Engineering195612, No. 1, 50–59.
2.
RabinowiczE.ChitaleyA.‘Friction and wear at elevated temperatures’, U.S. Technical Report WADC-TR-59–603, Part VIII, January 1967.
3.
BuckleyD. H.‘Friction characteristics of single crystal and polycrystalline aluminium oxide in contact in vacuum’, NASA TN D-3599.
4.
EarlesS. W. E.PowellD. G.‘Surface temperature and its relation to periodic changes in sliding conditions between unlubricated steel surfaces’, ASLE–ASME Lubrication Conference, Chicago 1967, Paper 67LC-3.
5.
KadhimM. J.‘Friction and wear of metals at high sliding speeds’, 1965 Ph.D. thesis, University of London.
6.
WilliamsK.‘The measurement of high-speed unlubricated metallic friction’, Lubrication and Wear Second Convention, Proc. Instn mech. Engrs178, Part 3N, 1.
7.
WilliamsK.GiffenE.‘Friction between unlubricated steel surfaces at sliding speeds up to 750 feet per second’, Lubrication and Wear Second Convention, Proc. Instn mech. Engrs178, Part 3N, 24.
8.
EarlesS. W. E.KadhimM. J.‘Friction and wear of unlubricated steel surfaces at speeds up to 655 ft/s’, Proc. Instn mech. Engrs1965–66180 (Part 1, No. 22), 531.
9.
BissonE. E.JohnsonR. L.SwikertM. A.GodfreyD.‘Friction, wear and surface damage of metals as affected by solid surface films’, NACA Report No. 1254, 1956.
10.
SauerF. M.‘Fundamental mechanism of wear and friction of unlubricated metallic surfaces at high sliding speeds’, United States Department of Commerce, O.T.S.1957, Order No. PB 131963.
11.
EarlesS. W. E.PowellD. G.‘Variations in friction and wear between unlubricated steel surfaces’, Proc. Instn mech. Engrs, Fifth Lubrication and Wear Group Convention, May 1967, Paper 21.
12.
RabinowiczE.Friction and wear of materials1965 (Wiley, New York).
13.
KerridgeM.‘Metal transfer and the wear process’, Proc. Phys. Soc.1957B70, 112.
14.
PowellD. G.EarlesS. W. E.‘Experimental techniques for the assessment of temperatures attained by sliding surfaces’, Proc. Instn mech. Engrs Symposium ‘Experimental Methods in Tribology’, London, March 1968.
15.
FureyM. J.‘Metallic contact and friction between sliding surfaces’, ASLE Trans.4No. 1, 1–11, April 1961.
16.
TamaiY.‘On the contact resistance between surface-oxidised metals in repeated sliding’, Wear11957/1958377–383.
