Designation:F3301−18aStandardforAdditiveManufacturing–PostProcessingMethods–StandardSpecificationforThermalPost-ProcessingMetalPartsMadeViaPowderBedFusion1,2ThisstandardisissuedunderthefixeddesignationF3301;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONPartsmadeviametalpowderbedfusionwherethepartbedisbelowtheannealtemperatureofthealloyinprocesswilllikelyformresidualstressesduringprocessing.Itisacommonpracticeintheindustrytoheattreatpartswhiletheyareconnectedtothebuildplatforminordertopreventgeometricdistortionwhenpartsareseparatedfromthebuildplatform.Otherpost-processtreatmentssuchashotisostaticpressingandsolutionannealinghavebeenshowntoreduceporosity,affectmechanicalpropertiesandmodifythemicrostructuretothedesiredcondition.Applicablepartscoveredinthisspecificationinclude,butarenotlimitedto,themanufactureofmedicalimplants,aerospaceparts,criticalpartsforpowergenerationandoilandgasproduction.Multipleheattreatmentsmaybeenforcedontheengineeringorpurchaseorderbylistingtherequiredconditions(forexampleSR/HIP,forstressreliefandhotisostaticpressing).PBFprocesseswherethepowderbedismaintainedatatemperatureintheSRConditionrangeshallbeconsideredSRConditionintheasbuiltstate.HotisostaticpressingcanbeusedtoachieveConditionSRwhilethepartsareattachedtothebuildplatform.Thisstandardshouldalsobeappliedtotestspecimensusedtogeneratedesigndataforpartmaterialproperties.1.Scope1.1Thisstandardspecifiestherequirementsforthermalpost-processingofpartsproducedviametalpowderbedfusiontoachievetherequiredmaterialpropertiesandmicrostructuretomeetengineeringrequirements.ThisstandardisintendedtobereferencedbyMaterialPartPropertyspecificationsforpowderbedfusion.Currently,thisstandardincludesthermalpost-processingforthematerialsincludingtitaniumalloys,cobalt28chromium6molybdenum,...
