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1、X-RayMicrodiffractiononDiamond-shapedNiTifor：X射線衍射儀對NiTi為菱形NewBossthJun.2004SEMXInternationalCongressCollaboratorsValentinaImbeni–SRIBradBoyce–SandiaLabsNobumichiTamura–LBLXiao-YanGong,AlanPelton,&TomDuerig–NDCRobRitchie’sGroup(ScottRobertson,MonicaBarney)–LBL/UCBerkeleythJun.2004SEMXInternationa
2、lCongressMethodologyLoadCellFEASimulationsX-rayBeamTensionNitinolTube4.67mmODwith0.38mmwallLasermachinedFullyAnnealed–Grains~20-100micronscompressionthJun.2004SEMXInternationalCongressBendMagnetSource(250x40mm)1:1Toroidalmirror1:1imageatslitsElevationviewPlanview4CrystalSi(111)MonochromatorCCDcam
3、eraSampleonscanningXYstageHorizontalfocusingK-BmirrorVerticalfocusingK-BmirrorMethodologyX-rayMicrodiffractionBeamsizeonsample:0.8x0.8mm2Photonenergyrange:5-14keVSchematiclayoutoftheX-rayMicrodiffractionBeamline(7.3.3.)attheALSthJun.2004SEMXInternationalCongressMethodologyX-rayMicrodiffraction-1m
4、icronspotNiTiDiffractionPatterns10mmGrainMapElasticStrainPlasticStrainNi&TiFluorescenceAusteniteDiff.PatternthJun.2004SEMXInternationalCongressDeviatioricDilationalFromenergyscan(VariablyMonochromatedX-rays)FromLauePatternsdeviations(broadbandpass(White)X-rays)StrainTensorStrainTensorsIncrystalre
5、ferenceframeexxexyexzexyeyyeyzexzeyzezz+CrystalOrientationFromLauePatternsInSamplereferenceframethJun.2004SEMXInternationalCongressDisplacement??StrainthJun.2004SEMXInternationalCongressFindingsthJun.2003SEMXInternationalCongressCompressionD=0mm:F=0NexxeyythJun.2004SEMXInternationalCongressCompre
6、ssionD=0.5mm:F=-0.393NexxeyythJun.2004SEMXInternationalCongressCompressionD=1.0mm:F=-0.747NexxeyythJun.2004SEMXInternationalCongressCompressionD=1.5mm:F=-1.080NexxeyythJun.2004SEMXInternationalCongressCompressionD=2.5mm:F=-1.465NexxeyythJun.2004SEMXInternationalCongressCompressionD=3.7mm:F=-1.543
7、NexxeyythJun.2004SEMXInternationalCongressCompressionD=3.7mm:F=-1.543NPhaseMapeyyAusteniteMartensitethJun.2004SEMXInternationalCongressInsight#1FiniteElem.AnalysisMicrodiffraction3.7mmcompressionQualitativeagreementwit
