材料物理导论-chapter_8_ternary_phase_diagram

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1、1.Componentrepresentation——ConcentrationtriangleEquilateraltriangle＋ClockwisecoordinateBCA←A%B%↗C%↘2.DeterminetheconcentrationBCA←A%B%↗C%↘a).TodeterminecompositionofpointOOPasspointOmakealineparalleltoBC.FindtheinterceptfromparalleltocoordinateAtoobtainthecontentsof

2、constituentA.Similarly,thecontentsofconstituentB,Ccanbeobtained.b).DeterminethecompositionofalloyI、II、III、IV.ABC908070605040302010102030405060708090102030405060708090←A%B%↗C%↘IPointI：A%=60%B%=30%C%=10%ABC908070605040302010102030405060708090102030405060708090←A%B%↗C%

3、↘IIPointII：A%=20%B%=50%C%=30%b).DeterminethecompositionofalloyI、II、III、IV.ABC908070605040302010102030405060708090102030405060708090←A%B%↗C%↘IIIPointIII：A%=20%B%=20%C%=60%b).DeterminethecompositionofalloyI、II、III、IV.ABC908070605040302010102030405060708090102030405060

4、708090←A%B%↗C%↘IVPointIV：A%=40%B%=0%C%=60%b).DeterminethecompositionofalloyI、II、III、IV.ABC908070605040302010102030405060708090102030405060708090←A%B%↗C%↘c).Pointoutthealloypossessingthecompositionof75%A+10%B+15%CABC908070605040302010102030405060708090102030405060708

5、090←A%B%↗C%↘d).PointouttheAlloypossessingthecompositionof50%A+20%B+30%CABC908070605040302010102030405060708090102030405060708090←A%B%↗C%↘2.ThespecificstraightlineinconcentrationtrianglePointII:20%A-50%B-30%CPointIII:20%A-20%B-60%CPointIV:40%A-0%B-60%CIIIIIIVBCA←A%B%

6、↗C%↘a).ThestraightlineparalleltoacertainedgePQThediagonalconstituentcontainsthesameconcentration.ABC908070605040302010102030405060708090102030405060708090←A%B%↗C%↘DrawoutthealloypossessingthecompositionofA＝40%DrawoutthealloypossessingthecompositionofC＝30%b).Passacer

7、tainculminationmakeastraightlineBCA←A%B%↗C%↘Da1′a2′c2c1a1a2FEConstantABC908070605040302010102030405060708090102030405060708090←A%B%↗C%↘DrawoutthealloywhichisC/B＝1/3DrawoutthealloywhichisA/C＝1/43.Linearruleandthecenterofgravityrulea).Linearrule——Applytotwo-phaseequil

8、ibriumProjectedonanyside，calculationwiththedualleverlawBCA←A%B%↗C%↘efge’f’g’Rb).ThecenterofgravityruleBCA←A%B%↗C%↘efd——Applytoternary