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1、TernaryAlloyPhaseDiagramsIntroductionTHE80TERNARYSYSTEMScoveredinthisSectionwereselectedfortheircommercialimportancefromthethousandsofsystemsscheduledforinclusionintheHandbookofTernaryAlloyPhaseDiagrams,tobepublishedbyASMin1994.The313diagramsshownherewerechosenfromthemorethan12,000asse
2、mbledforthatproject.WhereverarecentcompilationofdiagramsassessedundertheInternationalProgrammecoveredoneofthesesystems,prioritywasgiventothoseevaluateddiagramsinpreferencetoolder,unassessedwork.Theremainingdiagrams,althoughnotyetassessed,wereselectedasthebestavailable.Whenasinglesource
3、coveredasystem,asetofcompatiblediagramswasselectedfromit.Forsomesystems,however,diagramsfrommorethanonesourcewereneeded.Exceptforoccasionalconversionofcompositionscalefromatomictoweightpercentorchangeinorientationorlabeling,eachauthor'sdiagramhasbeenredrawn,butshownasoriginallypresente
4、d.Therefore,thediagramsdonot,inallinstances,agreewithoneanotherandwiththebinarydiagramspublishedinthisVolume.Thereferencesourceforeachdiagramisidentifiedbyacodeconsistingoftwonumbers(indicatingtheyearofpublication)followedbythefirstthreelettersofthefirstauthor's(oreditor's)surname.Thec
5、ompletecitationforeachsourcecodeislistedattheendofthisSection.BecausethisHandbookisdesignedtobeusedprimarilybyengineerstosolveindustrialproblems,thecompositionscaleisplottedinweightpercent.ConversionsbetweenweightandatomiccompositioncanbemadeusingthestandardatomicweightslistedintheAppe
6、ndix.Forthesakeofclarity,gridlinesarenotsuperimposedonthephasediagrams.However,tickmarksareprovidedalongthecompositionscalesaswellasthetemperaturescale,whichisshownindegreesCelsius.CelsiustemperaturescanbeeasilyconvertedtodegreesFahrenheitusingthetableintheAppendix.Whenanarrowheadappea
7、rsonatemperaturetroughlineinaliquidusprojection,itindicatesthedirectionofdecreasingtemperatureinthetrough.Dashedlinesareusedtodenoteuncertainorspeculativeboundaries.Dottedlinesindicatethelimitoftheinvestigatedregion.ThediagramspresentedinthisSectionareforstableequilibriumconditions,w
