ASTM_B_976_-_11_2015.pdf

Designation:B97611(Reapproved 2015)Standard Specification forFiber Reinforced Aluminum Matrix Composite(AMC)CoreWire for Aluminum Conductors,Composite Reinforced(ACCR)1This standard is issued under the fixed designation B976;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 specification covers fiber reinforced,aluminummatrix composite core wire used for mechanical reinforcementin the manufacture of aluminum conductor,composite rein-forced(ACCR).This wire consists of continuous filamentfibers of aluminum oxide in a matrix of aluminum.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.2.1 ExceptionSome non-standard SI units provided forinformation only do not appear in brackets.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 The following documents of the issue in effect on dateof material purchase form a part of this specification to theextent referenced herein.2.2 ASTM Standards:2B193 Test Method for Resistivity of Electrical ConductorMaterialsB830 Specification for Uniform Test Methods and Fre-quencyD3552 Test Method for Tensile Properties of Fiber Rein-forced Metal Matrix Composites3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 fiber reinforced aluminum matrix composite wire,nawire consisting of two constituents:the first a number ofcontinuous fibers of aluminum oxide along the axis of the wire,which is embedded in the second constituent of aluminummetal,as shown in Fig.1.3.1.2 lot,nunless otherwise specified in the contract ororder,a lot shall consist of all coils of wire of the samediameter submitted for inspection at the same time.3.1.3 production unit,na reel,spool,or other package ofwire that represents a single usable length.3.1.4 sample,nthe production unit(s)from which a testspecimen(s)has been removed,and which is considered tohave properties representative of the lot.3.1.5 specimen,na length of wire removed for test pur-poses.3.1.6 tow,na bundle,containing multiple fibers.3.1.7 AMC,nAluminum Matrix Composite,a materialconsisting of two constituents:the first a series of continuousfibers of aluminum oxide which is embedded in the secondconstituent of aluminum metal.3.1.8 ACCR,nAluminumConductorCompositeReinforced,a concentric-lay-stranded conductor made up ofouter aluminum strands of hard,heat resistant aluminum wiresand a core of round,aluminum matrix composite wire(s),foruse as overhead electrical conductors.4.Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Quantity of each size,4.1.2 Wire size(see 8.1),4.1.3 Place of inspection(see 11.1),4.1.4 Package size and type(see 12.1),4.1.5 Special package marking.5.Materials and Manufacture5.1 The fiber reinforcement shall be continuous tows ofaluminum oxide.1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.07 onConductors of Light Metals.Current edition approved Oct.1,2015.Published October 2015.Originallyapproved in 2011.Last previous edition approved in 2011 as B976 11.DOI:10.1520/B0976-11R15.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.2 The core wires shall be of such quality and purity thatthe finished product shall have the approximate properties andcharacteristics prescribed in this specification,including break-ing load,elongation,modulus properties,and electrical resis-tivity requirements set forth in Table 1.6.Tensile Test6.1 Before stranding,the composite core wire of any diam-eter shall conform to the tensile breaking load requirements setforth in Table 2(see Explanatory Note 1).6.2 Test MethodTensile testing of metal matrix compositematerials is covered by D3552,including the need for stringenttest frame alignment.However,this standard does not specifytesting of round metal matrix composite wire samples.Thus,for AMC core wire samples,the tensile test shall use aminimum gauge length of 24 in.(610 mm)(see ExplanatoryNote 2).Each end of the wire shall be adhesively bonded to adepth of 4 in.(100