材料英语证书考试PEC材料试验词汇.docx
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材料英语证书考试PEC材料试验词汇.docx
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材料英语证书考试PEC材料试验词汇
材料英语证书考试(PEC)-材料试验词汇
A
Adherence—Theextenttowhichacoatingbondstoasubstrate.
AdherenceIndex--MeasureoftheAdherenceofporcelainenamelandceramiccoatingsto
sheetmetal.
AlphaRockwellHardness—Indexoftheresistanceofaplastictosurfacepenetrationbya
specifiedindenterunderspecifiedloadappliedwithaRockwellHardnesstester.Highervalues
indicatehigherindentationHardness.
AxialStrain—TheStraininthedirectionthattheloadisapplied,oronthesameaxisasthe
appliedload.
Analogueboard—Amachinecircuitboard,whichconvertsanaloguesignalsintodigitalsignal.
AnchorPin—Asteelpinthatconnectsagriporjigtoaneyeend
AutoReturn—AutoReturn,whensettoon,causesthecrossheadtoreturnautomaticallytoits
Zeropointattheendofthetest.
B
BendTest—MethodformeasuringDuctilityofcertainmaterials.Therearenostandardized
termsforreportingbendtestresultsforbroadclassesofmaterials;rather,termsassociatedwith
bendtestsapplytospecificformsortypesofmaterials.Forexample,materialsspecifications
sometimesrequirethataspecimenbebenttoaspecifiedinsidediameter(ASTMA-360,steel
products).AbendtestforDuctilityofweldsisgiveninASTME-190.Resultsoftestsof
fiberboardarereportedbyadescriptionofthefailureorphotographs.
BendingStrength—AlternatetermforFlexuralStrength.Itismostcommonlyusedtodescribe
flexurepropertiesofcastironandwoodproducts.
BondStrength—Stress(tensileloaddividedbyareaofbond)requiredtoruptureabondformed
byanadhesivebetweentwometalblocks.
BreakElongation—TheElongationofthespecimentothebreakpoint.
BreakingLoad—Loadwhichcausesfractureinatensile,compression,flexureorTorsionTest.
Intensiletestsoftextilesandyarns,breakingloadalsoiscalledbreakingstrength.Intensile
testsofthinsheetmaterialsormaterialsinformofsmalldiameterwireitisdifficultto
distinguishbetweenbreakingloadandthemaximumloaddeveloped,sothelatterisconsidered
thebreakingload.
BreakingStrength—Stressrequiredrupturingthespecimen.
GLOSSARYOFMATERIALSTESTING
BulkModulusofElasticity—RatioofStresstochangeinvolumeofamaterialsubjectedto
axialloading.RelatedtoModulusofElasticity(E)andPoisson'sRatio(r)bythefollowing
equation:
BulkModulusK=E/3(1-2r).
CleavageStrength—Tensileloadrequiredtocauseseparationofa1-in.longmetal-to-metal
adhesivebondundertheconditionssetinASTMD-1062.
ClimbingDrumPeelTest—MethodfordeterminingPeelResistanceofadhesivebondbetween
arelativelyflexibleandarigidmaterial.(ASTMD-1781).
CoefficientofElasticity—AnalternatetermforModulusofElasticity.
CohesiveStrength—TheoreticalStressthatcausesfractureintensiletestifmaterialexhibitsno
plasticdeformation.
ComplexModulus—Measureofdynamicmechanicalpropertiesofamaterial,takinginto
accountenergydissipatedasheatduringdeformationandRecovery.Itisequaltothesumof
staticmodulusofamaterialanditslossmodulus.Inthecaseofshearloading,itiscalled
dynamicmodulus.
Compressibility—Extenttowhichamaterialiscompressedintestforcompressibilityand
Recoveryofgasketmaterials.ItisusuallyreportedwithRecovery.
CompressibilityandRecoveryTest—Methodformeasuringbehaviorofgasketmaterialsunder
shorttimecompressiveloadingatroomtemperature.ASTMF-36outlinesastandardprocedure.
Thistestisnotdesignedtoindicatelongterm(creep)behaviorandshouldnotbeconfused
withtheplastometertest.
Compression—Typicallyadirectionofforceappliedtoasampletodecreaseitsheight
CompressionFatigue—Abilityofrubbertosustainrepeatedfluctuatingcompressiveloads.
(ASTMD-623)
Compressionset—Theextenttowhichrubberispermanentlydeformedbyaprolonged
compressiveload(ASTMD-395).Shouldnotbeconfusedwithlowtemperaturecompression
set.
Compressiontest—Methodfordeterminingbehaviorofmaterialsundercrushingloads.
Specimeniscompressed,anddeformationatvariousloadsisrecorded.Compressivestressand
strainarecalculatedandplottedasastress-straindiagramwhichisusedtodetermineelastic
limit,proportionallimit,yieldpoint,YieldStrengthand(forsomematerials)compressive
strength.StandardcompressiontestsaregiveninASTMC-773(highstrengthceramics),
ASTME-9(metals),ASTME-209(metalsatelevatedtemperatures)andASTMD-695
(plastics).
Compression-DeflectionTest—Nondestructivemethodfordeterminingrelationshipbetween
compressiveloadanddeflectionunderloadforspecimen
CompressiveDeformation—ExtenttowhichamaterialdeformsunderaCrushingLoad.
CompressiveStrength—Maximumstressamaterialcansustainundercrushloading.
Compressiv
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