1、Designation:E266011Standard Digital Reference Images forInvestment Steel Castings for Aerospace Applications1This standard is issued under the fixed designation E2660;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last r
2、evision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 The digital reference images provided in the adjunct tothis standard illustrate various types and degrees of disconti-nuities oc
3、curring in thin-wall steel investment castings.2Use ofthis standard for the specification or grading of castingsrequires procurement of the adjunct digital reference imageswhich illustrate the discontinuity types and severity levels.They are intended to provide the following:1.1.1 Aguide enabling re
4、cognition of thin-wall steel castingdiscontinuities and their differentiation both as to type anddegree through digital radiographic examination.1.1.2 Example digital radiographic illustrations of disconti-nuities and a nomenclature for reference in acceptancestandards,specifications and drawings.1.
5、2 Two illustration categories are covered as follows:1.2.1 GradedSix common discontinuity types each illus-trated in eight degrees of progressively increasing severity.1.2.2 UngradedTwelve single illustrations of additionaldiscontinuity types and of patterns and imperfections notgenerally regarded a
6、s discontinuities.1.3 The reference radiographs were developed for castingsections up to 1 in.(25.4 mm)in thickness.1.4 All areas of this standard may be open to agreementbetween the cognizant engineering organization and thesupplier,or specific direction from the cognizant engineeringorganization.T
7、hese items should be addressed in the purchaseorder or the contract.NOTE1The set of digital reference images consists of 16 digital files,software to load the desired format and specific instructions on the loadingprocess.The 16 reference images illustrate eight grades of severity in sixcommon disco
8、ntinuity types and twelve ungraded discontinuities andcontain an image of a step wedge and two duplex-wire gauges.Availablefrom ASTM International Headquarters.Order number RRE2660.Referto Practice E2002 for wire pair details.1.5 The values stated in inch-pound units are to be regardedas standard.Th
9、e values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.6 These digital reference images are not intended toillustrate the types or degrees of discontinuities when perform-ing film radiography.If performing film ra
10、diography of thin-wall investment castings,refer to Reference RadiographsE192.1.7 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 and health practices and determin
11、e the applica-bility of regulatory limitations prior to use.1.8 Only licensed copies of the software and images shall beutilized for production inspection.A copy of the ASTM/Userlicense agreement shall be kept on file for audit purposes.2.Referenced Documents2.1 ASTM Standards:3E94 Guide for Radiogr
12、aphic ExaminationE192 Reference Radiographs of Investment Steel Castingsfor Aerospace ApplicationsE1025 Practice for Design,Manufacture,and MaterialGrouping Classification of Hole-Type Image Quality In-dicators(IQI)Used for RadiologyE1316 Terminology for Nondestructive ExaminationsE1320 Reference Ra
13、diographs for Titanium CastingsE2002 Practice for Determining Total Image Unsharpness inRadiologyE2597 Practice for Manufacturing Characterization of Digi-tal Detector Arrays2.2 SMPTE Practice:4RP133 SMPTE Recommended Practice Specifications forMedical Diagnostic Imaging test Pattern for Television1
14、This standard is under the jurisdiction of ASTM Committee E07 on Nonde-structive Testing and is the direct responsibility of Subcommittee E07.02 onReference Radiological Images.Current edition approved Dec.1,2011.Published December 2011.Originallyapproved in 2010.Last previous edition approved in 20
15、10 as E2660-10.DOI:10.1520/E2660-11.2The digital reference images are considered to be applicable to all thin-wallsteel castings,requiring close tolerances.They may also be used for nickel-base andcobalt-base cast alloys.Castings for which these images are applicable generallyinclude those made by t
16、he lost wax,frozen mercury,ceramicast or shell moldprocesses.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from Society of Motion Picture and Television Engineers,3 BarkerAvenue,White Plains,NY 10601;or www.smpte.org/smpte_store/*A Summary of Changes section appears at the end of this standardCopyrig
