SAE AMS7311 Piston Rings, Centrifugally-Cast Alloyed Iron, 0.50Mo - 0.50Cu (NONCURRENT Jan 2004)

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Product Code:SAE AMS7311
Title:Piston Rings, Centrifugally-Cast Alloyed Iron, 0.50Mo - 0.50Cu (NONCURRENT Jan 2004)
Issuing Committee:Ams E Carbon And Low Alloy Steels Committee
Scope:This specification covers a centrifugally-cast, alloyed iron in the form of sleeves for the fabrication of piston rings. Primarily for use as top compression rings in aircraft piston engines. Rings usually require chromium plating for compatibility with the cylinder barrel material.
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【英文标准名称】:StandardTestMethodforNondestructiveAssayofRadioactiveMaterialbyTomographicGammaScanning
【原文标准名称】:使用层析成象γ扫描法对放射性物质进行无损分析的标准试验方法
【标准号】:ASTMC1718-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:C26.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:TheTGSprovidesanondestructivemeansofmappingtheattenuationcharacteristicsandthedistributionoftheradionuclidecontentofitemsonavoxelbyvoxelbasis.TypicallyinaTGSanalysisaverticallayer(orsegment)ofanitemwillbedividedintoanumberofvoxels.Bycomparison,asegmentedgammascanner(SGS)candeterminematrixattenuationandradionuclideconcentrationsonlyonasegmentbysegmentbasis.Ithasbeensuccessfullyusedtoquantify238Pu,239Pu,and235U.SNMloadingsfrom0.5gto200gof239Pu(5,6),from1gto25gof235U(7),andfrom0.1to1gof238Puhavebeensuccessfullymeasured.TheTGStechniquehasalsobeenappliedtoassayingradioactivewastegeneratedbynuclearpowerplants(NPP).RadioactivewastefromNPPisdominatedbyactivationproducts(forexample,54Mn,58Co,60Co,110mAg)andfissionproducts(forexample,137Cs,134Cs).TheradionuclideactivitiesmeasuredinNPPwasteisintherangefrom3.7E+04Bqto1.0E+07Bq.SomeresultsofTGSapplicationtonon-SNMradionuclidescanbefoundintheliterature(8).TheTGStechniqueiswellsuitedforassayingitemsthathaveheterogeneousmatricesandthatcontainanon-uniformradionuclidedistribution.Sincetheanalysisresultsareobtainedonavoxelbyvoxelbasis,theTGStechniquecaninmanysituationsyieldmoreaccurateresultswhencomparedtoothergammaraytechniquessuchasSGS.Indeterminingtheradionuclidedistributioninsideanitem,theTGSanalysisexplicitlytakesintoaccountthecrosstalkbetweenvariousverticallayersoftheitem.TheTGSanalysistechniqueusesamaterialbasissetmethodthatdoesnotrequiretheusertoselectamassattenuationcurveapriori,providedthetransmissionsourcehasatleast2gammalinesthatspantheenergyrangeofinterest.AcommerciallyavailableTGSsystemconsistsofbuildingblocksthatcaneasilybeconfiguredtooperatethesystemintheSGSmodeorinafar-fieldgeometry.TheTGSprovides3-dimensionalmapsofgammarayattenuationandradionuclideconcentrationwithinanitemthatcanbeusedasadiagnostictool.Itempreparationislimitedtoavoidinglargequantitiesofheavilyattenuatingmaterials(suchasleadshielding)inordertoallowsufficienttransmissionthroughthecontainerandthematrix.1.1Thistestmethoddescribesthenondestructiveassay(NDA)ofgammarayemittingradionuclidesinsidecontainersusingtomographicgammascanning(TGS).Highresolutiongammarayspectroscopyisusedtodetectandquantifytheradionuclidesofinterest.Theattenuationofanexternalgammaraytransmissionsourceisusedtocorrectthemeasurementoftheemissiongammaraysfromradionuclidestoarriveataquantitativedeterminationoftheradionuclidespresentintheitem.1.2TheTGStechniquecoveredbythetestmethodmaybeusedtoassayscraporwastematerialincansordrumsinthe1to500litrevolumerange.Otheritemsmaybeassayedaswell.1.3ThetestmethodwillcovertwoimplementationsoftheTGSprocedure:(1)IsotopeSpecificCalibrationthatusesstandardsofknownradionuclidemasses(oractivities)todeterminesystemresponseinamass(oractivity)versuscorrectedcountratecalibration,thatappliestoonlythosespecificradionuclidesforwhichitiscalibrated,and(2)ResponseCurveCalibrationthatusesgammaraystandardstodeterminesystemresponseasafunctionofgammarayenergyandtherebyestablishescalibrationforallgammaemittingradionuclidesofinterest.1.4Thistestmethodwillalsoincludeatechniquetoextendth......
【中国标准分类号】:F46
【国际标准分类号】:27_120_30
【页数】:13P.;A4
【正文语种】:英语


基本信息
标准名称:特种产品焊接通用技术条件
中标分类: 船舶 >> 船舶综合 >> 船舶工艺
发布日期:1900-01-01
实施日期:1900-01-01
首发日期:1900-01-01
作废日期:1900-01-01
出版日期:1900-01-01
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所属分类: 船舶 船舶综合 船舶工艺