ASTM_C_1327_-_15_2019.pdf

Designation:C132715(Reapproved 2019)Standard Test Method forVickers Indentation Hardness of Advanced Ceramics1This standard is issued under the fixed designation C1327;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.1.Scope1.1 This test method covers the determination of the Vickersindentation hardness of advanced ceramics.In this test,apointed,square-based,pyramidal diamond indenter of pre-scribed shape is pressed into the surface of a ceramic with apredetermined force to produce a relatively small,permanentindentation.The surface projection of the two diagonals of thepermanent indentation is measured using a light microscope.The average diagonal size and the applied force are used tocalculate the Vickers hardness,which represents the materialsresistance to penetration by the Vickers indenter.Hardness iscomputed as the ratio of the force to the contact surface area.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 UnitsWhen Knoop and Vickers hardness tests weredeveloped,the force levels were specified in units of grams-force(gf)and kilograms-force(kgf).This standard specifiesthe units of force and length in the International System ofUnits(SI);that is,force in newtons(N)and length in mm orm.However,because of the historical precedent and contin-ued common usage,force values in gf and kgf units areoccasionally provided for information.This test method speci-fies that Vickers hardness be reported either in units of GPa,ora dimensionless Vickers hardness number that has impliedunits of kgf/mm2.1.4 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.1.5 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.Referenced Documents2.1 ASTM Standards:2E4 Practices for Force Verification of Testing MachinesE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE384 Test Method for Microindentation Hardness of Mate-rialsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodIEEE/ASTM SI 10 American National Standard for MetricPractice2.2 European Standard:3CEN ENV 843-4 Advanced Technical Ceramics,MonolithicCeramics,Mechanical Properties at Room Temperature,Part 4:Vickers,Knoop and Rockwell Superficial Hardness2.3 Japanese Standard:4JIS R 1610 Testing Method for Vickers Hardness of HighPerformance Ceramics2.4 ISO Standard:5ISO 6507 2Metallic MaterialsHardness TestVickersTestPart 2:HV0.2 to Less Than HV53.Terminology3.1 Definitions:3.1.1 Vickers hardness number(HV),nan expression ofhardness obtained by dividing the force applied to a Vickersindenter by the surface area of the permanent impression madeby the indenter.3.1.2 Vickers indenter,na square-based,pyramidal-shapeddiamond indenter with face angles of 136 00.4.Summary of Test Method4.1 This test method describes an indentation hardness testusing a calibrated machine to force a pointed,square-based,1This test method is under the jurisdiction of ASTM Committee C28 onAdvanced Ceramics and is the direct responsibility of Subcommittee C28.01 onMechanical Properties and Performance.Current edition approved July 1,2019.Published July 2019.Originally approvedin 1996.Last previous edition approved in 2015 as C1327 15.DOI:10.1520/C1327-15R19.2For 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.3Available from European Committee for Standardization(CEN),36 rue deStassart,B-1050,Brussels,Belgium,http:/www.cenorm.be.4Available from Japanese Standards Organization(JSA),4-1-24 AkasakaMinato-Ku,Tokyo,107-8440,Japan,http:/www.jsa.or.jp.5Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,Case postale 56,CH-1211,Geneva 20,Switzerland,http:/www.iso.ch.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 W