Showing papers by "J.D. Embury published in 2006"
TL;DR: A variety of surface observational techniques including full-field strain mapping based on digital image correlation analysis, electron back-scatter diffraction and in situ field emission scanning electron microscopy have been used to follow the patterns of inhomogeneous flow which occur during tensile testing of AA5754 as discussed by the authors.
123 citations
TL;DR: In this article, a framework is developed to describe the accumulation of internal stresses during plastic co-deformation in terms of a small number of physical parameters, including the response to changes in path (tension/compression) and their dimensional stability on heating.
Abstract: The mechanical response of two-phase materials during plastic co-deformation is examined with a particular emphasis on the role of the internal stresses developed during deformation. A framework is developed to describe the accumulation of these internal stresses during plastic co-deformation in terms of a small number of physical parameters. This simplified framework is used to rationalize the observed behaviour of copper–chromium and copper–niobium two-phase materials in terms of their monotonic strain hardening rates, the response to changes in path (tension/compression) and their dimensional stability on heating.
51 citations
TL;DR: Instrumented indentation and tensile tests were performed on free standing Cu/Ag multilayer thin films with layer thicknesses in the range 0.85-900 nm as discussed by the authors.
Abstract: Instrumented indentation and tensile tests were performed on free standing Cu/Ag multilayer thin films with layer thicknesses in the range 0.85–900 nm. The effect of layer thickness can be described by a Hall–Petch relationship. The work-hardening rate in the tensile test depends on layer thickness, which indicates that the interfaces create storage sites for dislocations and follows an inverse power law.
48 citations
TL;DR: In this article, an analogy between plastic indentation and phase transformation with a curved front is proposed to determine the tip radius of the growing phase in the case where plastic dissipation occurs.
5 citations