EBSD

EBSD

اسلاید 1: EBSDموضوع : ارائه دهنده : سامان رسول پوراستاد مربوطه : دکتر اطمینان فر1دی ماه 97

اسلاید 2: EBSDEBSD = Electron Back Scatter Diffraction whichallows:Crystallographic OrientationsMisorientationsTexture measurementGrain size and boundary typesPhasesTo be characterised and quantified on a macro to submicronor nano-meter scale2

اسلاید 3: What does EBSD Contribute to Materials Analysis?EDS/WDS - Chemical analysis – i.e. What the sample is made fromEBSD - Microstructural analysis– Polycrystalline materialsGrain Structure - size/distribution, ASTM number etc.Grain Boundary CharacteristicsMacro & Micro-Crystallographic TexturePhase Discrimination and distributionDeformation– Single Crystal materials/deposited layersCrystal orientationEpitaxy between layers– i.e. How the sample is put together and what condition it is in3

اسلاید 4: Typical ApplicationsMetals– Metal production i.e. sheet metal, castings, forgings - automotive,aerospace, power generation and distribution, petrochemical andchemical plant, nuclear i.e. extreme duty materials - high strength,high temperature and corrosive environments. Electronics.– Phase identification and discrimination– Texture analysis, grain boundary characterisation– DeformationGeological– Phase identification and discrimination– Orientation & texture analysisCeramics– Phase identification and discrimination– Orientation & texture analysis4

اسلاید 5: Typical Areas of Investigation• Production and process control– Cost savings - reduce heat treatment times, optimise heattreatment and phase transformation, investigate grain size,grain boundary and texture evolution– Improved product i.e. surface finish, forming or joiningcharacteristics, process optimisation & control– Control physical properties - improve or achieve specificproperties i.e. high corrosion resistance, fatigue or cracking(stress corrosion cracking) resistance.• Component life-time prediction– Characterise microstructure - identify problem phases ormicrostructural feature• Failure Analysis– Investigate micrstructural features associated with failure andpropose failure mechanism5

اسلاید 6: Schematic Layout of EBSD System• Schematic layoutof components• PC and Imaginghardwarecommon forINCA Energyand Wave• Market leadingEBSD, EDS &WDS all fromone vendor6