Designation:E399–90(Reapproved1997)StandardTestMethodforPlane-StrainFractureToughnessofMetallicMaterials1ThisstandardisissuedunderthefixeddesignationE399;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,(e)-typesarelistedasfollows:Sectionsstrainfracturetoughness(KIc)ofmetallicmaterialsbytestsusingavarietyoffatigue-crackedspecimenshavingathick-.(---—Plane--()(1).,Configurations,andPrepara-7tionfunctionofthemaximumloadthespecimencansustain,----,Start
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