ASTM D897-01
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B211SpecificationforAluminumandAluminum-Alloy
Bar,Rod,andWire3
D907TerminologyofAdhesives5
E4PracticesforForceVerificationofTestingMachines6
2.2OtherDocuments:
AISI10207
3.Terminology
3.1Manyofthetermsusedinthistestmethodaredefined
inTerminologyD907.
4.SignificanceandUse
4.1Thistestmethodisprimarilycomparative.However,it
doeshaveapplicationasadiscriminatorindeterminingvaria-
tionsinadherendsurfacepreparationparametersandadhesive
environmentaldurability.Thetestmethodhasfoundapplica-
tionsincontrollingsurfacepreparations,primer,andadhesive
systemsfordeterminingstrengthpropertiesoftestedsystems.
5.Apparatus
5.1TestingMachine,hasaforcemeasurementaccuracyof
61%whencalibratedincompliancewithPracticesE4
requirementsandcapableofmaintainingaspecifiedrateof
ladingandcomprisingessentiallythefollowing:
5.1.1FixedMember—Afixedoressentiallystationary
member,carryingonegrip.
5.1.2MovableMember,carryingasecondgrip.
5.1.3Grips,forholdingatestspecimenbetweenthefixed
memberandthemovablemember.Usetheself-aligningtype.
Thegripsshallbeattachedtothefixedandmovablemember,
respectively,insuchawaythattheywillmoveintoalignment
assoonasanyloadisapplied,sothatthelongaxisofthetest
specimenwillcoincidewiththedirectionoftheappliedpull
throughthecenterlineofthegripassembly.Whilethedesign
ofgripsofthistypeisoptional,onethathasbeenfound
satisfactoryisshowninFig.1.
6.TestSpecimens
6.1UsespecimensinaccordancewithFig.2.Reuseofthe
specimensisallowedbyresurfacingthosesurfaceareasthat
containedtheadhesive.Dothisbygrindingtheadhesive-faced
surfaceflatandparallel.Metalsconformingtothefollowing
ASTMspecificationsarerecommended:
MetalDesignationBrassASTMB16,C3600;half-hardtemperCopperASTMB133,C11000;hardtemperAluminumASTMB211,A92024;G3SteelAISI1020,G10200;cold-finishedbarPhosphorbronzeASTMB139,C54400MagnesiumASTMB107,AlloyAZ61AForM1A-FbutseeD950NickelsilverASTMB151,C77000;quarter-hard
6.2Test10specimens.
6.3Discardresultsifaspecimenbreaksataflawwhichis
remotefromthebondlineunlesssuchaflawconstitutesavariable,theeffectofwhichisdesiredtostudy.Testasubstitute
specimentoreplacethediscardedresult.
5AnnualBookofASTMStandards,Vol15.06.6AnnualBookofASTMStandards,Vol03.01.7AvailablefromAmericanIronandSteelInstitute(AISI),110117thSt.,NW,Suite1300,Washington,DC
20036.CorrosionPreventiveFinish
in.mm
1⁄161.53⁄164.750.31257.937519⁄3215.13⁄41931⁄3224.612511⁄82817⁄1636115⁄1643.323⁄470
FIG.1TestGrips(Cold-RolledSteel)
MetalSpecimen
NOTE1—Surfacesofmetalspecimensshallbegroundflatandparallel.Itispreferabletogrindallmetalspecimensatthesametime.
in.mmin.mm
1⁄46.41.12960.00528.6860.135⁄815.917⁄847.6
FIG.2Test
Specimen7.Adhesive
7.1Prepareareasthataretobecementedinaccordancewith
therecommendationsofthemanufactureroftheadhesive.
8.Procedure
8.1Placethespecimeninthegripsofthetestingmachine;
takingcaretoalignthespecimenandthegripswithan
imaginarylinejoiningthepointsofattachmentofthegripsto
themachine.Starttestloadingofthespecimenasquicklyas
possible.
8.2SpeedofTesting—Forallmaterialsapplyaloadtothe
specimenof544.3to635kg(1200to1400lb)/min,oradjust
thecrossheadspeedofthetestingmachinesothattheloadcan
beaccuratelydetermined,butnottoexceed127mm/min
(0.050in./min)whenthemachineisrunningidle.
8.3Record—Recordthemaximumloadcarriedbythe
specimenatfailureandalsothefollowing:
8.3.1Thepercentageofcohesion,adhesion,andcontact
failures(Note1).Thiswillbebasedonavisualinspection.
NOTE1—Cohesivefailuremaybeobtainedbyobservinghowmuchofthefailurehasoccurredintheadhesiveitself.Thatis,ifthecementhasadheredtothemetaltestpiecesandnovoidsarevisual,itrepresentsa100percentcohesivefailure.Adhesionfailurereferstothelackofadheringtometalsbeingfastened.Contactfailurereferstolackofgluelinesbeingincontactduetounevensurfaces,poorpressuredistribution,etc.
9.Calculations
9.1Tensilestrengthofthespecimensisthebreakingload.
Expresstheresultingramspersquaremillimetre(poundsper
squareinch)andifpossiblereporttothreesignificantfigures.9.2Foreachseriesoftestscalculatethearithmeticmeanof
allthevaluesobtainedandreportasthe“averagevalue.”
10.Report
10.1Reportthefollowinginformation:
10.1.1Completeidentificationofthematerialtested,includ-
ingtypes,source,manufacturer’scodenumbers,form,etc.
10.1.2Methodofpreparingtestspecimens,
10.1.3Averagethicknessofadhesivelayerafterformation
ofthejoint,within0.025mm(0.001in.).Describethemethod
ofobtainingthethicknessoftheadhesivelayerincluding
procedure,locationofmeasurements,andrangeofmeasure-
ments.
10.1.4Testingroomconditions,
10.1.5Numberofspecimenstested,
10.1.6Speedoftesting,and
10.1.7Averagevalueofthetensilestrength,withanaverage
valueofthepercentageofcohesionfailureforthespecimens.
11.PrecisionandBias
11.1Precisionandbiasforthistestmethodisbeingdevel-
opedandwillbeavailablebySeptember2004.
12.Keywords
