ASTM_D_7755_-_11.pdf

Designation:D775511Standard Practice forDetermining the Wear Volume on Standard Test Pieces Usedby High-Frequency,Linear-Oscillation(SRV)Test Machine1This standard is issued under the fixed designation D7755;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers a procedure for determining thewear volume WVof wear scars and tracks on test piecestribologically stresses under high-frequency,linear-oscillationmotion using a SRV test machine by means of stylus tipprofilometry.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D2714 Test Method for Calibration and Operation of theFalex Block-on-Ring Friction and Wear Testing MachineD2782 Test Method for Measurement of Extreme-PressureProperties of Lubricating Fluids(Timken Method)D3702 Test Method for Wear Rate and Coefficient of Fric-tion of Materials in Self-Lubricated Rubbing ContactUsing a Thrust Washer Testing MachineD4175 Terminology Relating to Petroleum,PetroleumProducts,and LubricantsD5620 Test Method for Evaluating Thin Film Fluid Lubri-cants in a Drain and Dry Mode Using a Pin and Vee BlockTest Machine(Withdrawn 2010)3D5706 Test Method for Determining Extreme PressureProperties of Lubricating Greases Using a High-Frequency,Linear-Oscillation(SRV)Test MachineD5707 Test Method for Measuring Friction and Wear Prop-erties of Lubricating Grease Using a High-Frequency,Linear-Oscillation(SRV)Test MachineD6425 Test Method for Measuring Friction and Wear Prop-erties of Extreme Pressure(EP)Lubricating Oils UsingSRV Test Machine2.2 DIN Standards:4DIN 51631:1999-04 Special-boiling-point spirit Require-ments and testingDIN 51834-3:2008-12 Testing of lubricants Tribologicaltest in translatory oscillation apparatus Part 3:Determi-nation of tribological behaviour of materials in co-operation with lubricantsDIN EN ISO 13565-2:1998 Geometrical Product Specifica-tions(GPS)Surface texture:Profile method;Surfaceshaving stratified functional properties Part 2:Heightcharacterization using linear material ratio curve(replacesof DIN 4776:1990:Measurement of surface roughness;parameters RK,RPK,RVK,Mr1,Mr2for the description ofthe material portion)3.Terminology3.1 Definitions:3.1.1 Hertzian contact area,nthe apparent area of contactbetween two non-conforming solid bodies pressed against eachother.3.1.2 Hertzian contact pressure,nmagnitude of the pres-sure at any specified location in a Hertzian contact area,ascalculated from Hertzs equations of elastic deformation.TheHertzian contact pressure can also be calculated and reportedas maximum value Pmaxin the centre of the contact or asPaverageas average over the total contact area.D41753.1.3 seizure,nlocalized fusion of metal between therubbing surfaces of the test pieces.D57063.1.3.1 DiscussionSeizure is usually indicated by a sharpincrease in coefficient of friction,wear,or unusual noise andvibration.In this test method,increase in coefficient of friction1This practice is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricants and is the direct responsibility of Subcom-mittee D02.L0 on Industrial Lubricants and Engineering Sciences of High Perfor-mance Fluids and Solids.Current edition approved Oct.1,2011.Published November 2011.DOI:10.1520/D775511.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Deutsches Institut fur Normung e.V.(DIN),Beuth VerlagGmbH,Burggrafenstrae 6,D-10787 Berlin 30,Germany,http:/www.din.de.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 is displayed on the chart recorder as permanent rise in thecoefficient of friction from a steady value.3.1.4 wear,ndamage to a solid surface,generally involv-ing progressive loss of material,due to the relative motionbetween that surface and a contacting substance or substances.D2714,D2782,D56203.1.5 wear rate,nthe rate of material removal or dimen-sional change due to wear per unit of exposure parameter;forexample,quantity of material removed(mass,volume,thick-ness)in unit distance of sliding or unit time.3.1.5.1 DiscussionAnother term somet