材料英语证书考试(pec)-材料试验词汇

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1、材料英语证书考试(PEC)-材料试验词汇AAdherence—Theextenttowhichacoatingbondstoasubstrate.AdherenceIndex--MeasureoftheAdherenceofporcelainenamelandceramiccoatingstosheetmetal.AlphaRockwellHardness—Indexoftheresistanceofaplastictosurfacepenetrationbyaspecifiedindenteru

2、nderspecifiedloadappliedwithaRockwellHardnesstester.HighervaluesindicatehigherindentationHardness.AxialStrain—TheStraininthedirectionthattheloadisapplied,oronthesameaxisastheappliedload.Analogueboard—Amachinecircuitboard,whichconvertsanaloguesignalsin

3、todigitalsignal.AnchorPin—AsteelpinthatconnectsagriporjigtoaneyeendAutoReturn—AutoReturn,whensettoon,causesthecrossheadtoreturnautomaticallytoitsZeropointattheendofthetest.BBendTest—MethodformeasuringDuctilityofcertainmaterials.Therearenostandardizedt

4、ermsforreportingbendtestresultsforbroadclassesofmaterials;rather,termsassociatedwithbendtestsapplytospecificformsortypesofmaterials.Forexample,materialsspecificationssometimesrequirethataspecimenbebenttoaspecifiedinsidediameter(ASTMA-360,steelproducts

5、).AbendtestforDuctilityofweldsisgiveninASTME-190.Resultsoftestsoffiberboardarereportedbyadescriptionofthefailureorphotographs.BendingStrength—AlternatetermforFlexuralStrength.Itismostcommonlyusedtodescribeflexurepropertiesofcastironandwoodproducts.Bon

6、dStrength—Stress(tensileloaddividedbyareaofbond)requiredtoruptureabondformedbyanadhesivebetweentwometalblocks.BreakElongation—TheElongationofthespecimentothebreakpoint.BreakingLoad—Loadwhichcausesfractureinatensile,compression,flexureorTorsionTest.Int

7、ensiletestsoftextilesandyarns,breakingloadalsoiscalledbreakingstrength.Intensiletestsofthinsheetmaterialsormaterialsinformofsmalldiameterwireitisdifficulttodistinguishbetweenbreakingloadandthemaximumloaddeveloped,sothelatterisconsideredthebreakingload

8、.BreakingStrength—Stressrequiredrupturingthespecimen.GLOSSARYOFMATERIALSTESTINGBulkModulusofElasticity—RatioofStresstochangeinvolumeofamaterialsubjectedtoaxialloading.RelatedtoModulusofElasticity(E)andPoisson'sRatio(r)bythefollowingequation:Bu