title: Deformation compatibility in a single crystalline Ni superalloy.
abstract: Deformation in materials is often complex and requires rigorous understanding to predict engineering component lifetime. Experimental understanding of deformation requires utilization of advanced characterization techniques, such as high spatial resolution digital image correlation (HR-DIC) and high angular resolution electron backscatter diffraction (HR-EBSD), combined with clear interpretation of their results to understand how a material has deformed. In this study, we use HR-DIC and HR-EBSD to explore the mechanical behaviour of a single-crystal nickel alloy and to highlight opportunities to understand the complete deformations state in materials. Coupling of HR-DIC and HR-EBSD enables us to precisely focus on the extent which we can access the deformation gradient,F, in its entirety and uncouple contributions from elastic deformation gradients, slip and rigid body rotations. Our results show a clear demonstration of the capabilities of these techniques, found within our experimental toolbox, to underpin fundamental mechanistic studies of deformation in polycrystalline materials and the role of microstructure.
authors.affiliation: Department of Materials , Imperial College London, Exhibition Road , London SW7 2AZ, UK.
authors.forename: Jun
authors.identifier: 0000-0002-9050-6018
authors.initials: J
authors.lastname: Jiang
authors.affiliation: Department of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, UK; Department of Mechanical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA 01609-2280, USA.
authors.forename: Tiantian
authors.initials: T
authors.lastname: Zhang
authors.affiliation: Department of Materials , Imperial College London, Exhibition Road , London SW7 2AZ, UK.
authors.forename: Fionn P E
authors.initials: FP
authors.lastname: Dunne
authors.affiliation: Department of Materials , Imperial College London, Exhibition Road , London SW7 2AZ, UK.
authors.forename: T Ben
authors.identifier: 0000-0001-5343-9365
authors.initials: TB
authors.lastname: Britton
keywords: deformation gradient compatibility; geometrically necessary dislocations; high-resolution electron backscatter diffraction; single slip