Applied Physics Letters · 2014 · 25 citations · 21 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials CharacterizationMechanical Behavior Of MaterialsStructural MaterialsComposite MaterialsDeformation MechanismsMechanics Of Composite MaterialsMetal Matrix CompositesStress-strain BehaviorX-ray DiffractionBulk Metallic GlassesDeformationDeformation BehaviorIn Situ X-ray DiffractionPseudoplastic BehaviorSynchrotron DiffractionSynchrotron X-ray DiffractionX-ray Diffraction Analysis
The deformation behavior and load transfer of a dual-phase composite composed of martensite NiTi embedded in brittle Ti2Ni matrices were investigated by using in situ synchrotron x-ray diffraction during compression. The composite exhibits a stage-wise deformation feature and a double-yielding phenomenon, which were caused by the interaction between Ti2Ni and NiTi with alternative microscopic deformation mechanism. No load transfer occurs from the soft NiTi dendrites to the hard Ti2Ni matrices during the pseudoplastic deformation (detwinning) of NiTi, which is significantly different from that previously reported in bulk metallic glasses matrices composites.
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