ASTM_F_3301_-_18a.pdf

Designation:F330118aStandard forAdditive Manufacturing Post Processing Methods Standard Specification for Thermal Post-Processing MetalParts Made Via Powder Bed Fusion1,2This standard is issued under the fixed designation F3301;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONParts made via metal powder bed fusion where the part bed is below the anneal temperature of thealloy in process will likely form residual stresses during processing.It is a common practice in theindustry to heat treat parts while they are connected to the build platform in order to prevent geometricdistortion when parts are separated from the build platform.Other post-process treatments such as hotisostatic pressing and solution annealing have been shown to reduce porosity,affect mechanicalproperties and modify the microstructure to the desired condition.Applicable parts covered in this specification include,but are not limited to,the manufacture ofmedical implants,aerospace parts,critical parts for power generation and oil and gas production.Multiple heat treatments may be enforced on the engineering or purchase order by listing the requiredconditions(for example SR/HIP,for stress relief and hot isostatic pressing).PBF processes where thepowder bed is maintained at a temperature in the SR Condition range shall be considered SRCondition in the as built state.Hot isostatic pressing can be used to achieve Condition SR while the parts are attached to the buildplatform.This standard should also be applied to test specimens used to generate design data for part materialproperties.1.Scope1.1 This standard specifies the requirements for thermalpost-processing of parts produced via metal powder bed fusionto achieve the required material properties and microstructureto meet engineering requirements.This standard is intended tobe referenced by Material Part Property specifications forpowder bed fusion.Currently,this standard includes thermalpost-processing for the materials including titanium alloys,cobalt 28 chromium 6 molybdenum,alloy UNS N07718,alloyUNS N06625,alloy,UNS 31603 and AlSi10Mg.This specifi-cation will be updated as new powder bed fusion material heattreatments are developed.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Normative References2.1 The following documents,in whole or in part,arenormatively referenced in this document and are indispensablefor its application.For dated references,only the edition citedapplies.For undated references,the latest edition of thereferenced document(including any amendments)applies.1This specification is under the jurisdiction of ASTM Committee F42 onAdditive Manufacturing Technologies and is the direct responsibility of Subcom-mittee F42.05 on Materials and Processes.Current edition approved July 15,2018.Published August 2018.Originallyapproved in 2018.Last previous edition approved in 2018 as F3301-18.DOI:10.1520/F3301-18A.2This document has been prepared by ASTM F42.05 and ISO TC261 inagreement to deconvolve legacy ASTM metal powder bed fusion standards adoptedwithin F42 only.The specifications in 4.7 are derived from work by the U.S.Army,RDECOM ARDEC and support a forthcoming material specification.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 2.2 ASTM Standards:3A262 Practices for Detecting Susceptibility to IntergranularAttack in Austenitic Stainless SteelsA484/A484M Specification for General Requirements forStainless Steel Bars,Billets,and ForgingsA1080 Practice for Hot Isostatic Pressing of Steel,StainlessSteel,and Related Alloy Castings2.3 AMS Standards:4AMS2759 Heat Treatment of Steel Parts,General Require-mentsAMS2771 Heat Treatment of Aluminum Alloy CastingsAMS2774 Heat Treatment