FRACTURETOUGHNESSEVALUATIONBYR-CURVEMETHODSAsymposiumsponsoredbyCommitteeE-24onFractureTestingofMetalsAMERICANSOCIETYFORTESTINGANDMATERIALSASTMSPECIALTECHNICALPUBLICATION527D.E.McCabe,symposiumchairmanmListprice$9.7504-527000-30%AMERICANSOCIETYFORTESTINGANDMATERIALS1916RaceStreet,Philadelphia,Pa.19103ANNIVESSARyCopyrightbyASTMInt'l(allrightsreserved);MonDec2111:12:24EST2015Downloaded/printedbyUniversityofWashington(UniversityofWashington)pursuanttoLicenseAgreement.Nofurtherreproductionsauthorized.®byAMERICANSOCIETYFORTESTINGANDMATERIALS1973LibraryofCongressCatalogCardNumber72-97867NOTETheSocietyisnotresponsible,asabody,forthestatementsandopinionsadvancedinthispublication.PrintedinTallahassee,Fla.April1973CopyrightbyASTMInt'l(allrightsreserved);MonDec2111:12:24EST2015Downloaded/printedbyUniversityofWashington(UniversityofWashington)pursuanttoLicenseAgreement.NofurtherreproductionsautForewordThispublicationisacollectionofpaperspresentedatatechnicalsymposiumonR-curvesheldduringtheregularCommitteeE-24meetingsintheFallof1971.ItrepresentsanearlyeffortbyaSubcommittee1taskgrouptoorganizethepresentstateofR-curvetechnologyinpreparationforarenewedattempttoapplythemethodtoplane-stressfracturetoughnessevaluation.ThesymposiumwassponsoredbyCommitteeE-24onFractureTestingofMetals,AmericanSocietyforTestingandMaterials.D.E.McCabe,ArmcoSteelCorp.,presidedassymposiumchairman.CopyrightbyASTMInt'l(allrightsreserved);MonDec2111:12:24EST2015Downloaded/printedbyUniversityofWashington(UniversityofWashington)pursuanttoLicenseAgreement.NofurtherreproductionsauthorizeRelatedASTMPublicationsFractureToughness,STP514(1972),$18.75,04-514000-30ReviewofDevelopmentsinPlaneStrainFractureToughnessTesting,STP463(1970),$18.25,04-463000-30ElectronFractography,STP436(1968),$11.00,04-436000-30CopyrightbyASTMInt'l(allrightsreserved);MonDec2111:12:24EST2015Downloaded/printedbyUniversityofWashington(UniversityofWashington)pursuanttoLicenseAgreement.NofurtherreproductionsauthorizedContentsIntroduction1CrackGr...