Papers by Keyword: Orientation Image Microscopy (OIM)

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Authors: L.M. Dougherty, Ian M. Robertson, J.S. Vetrano, S.M. Bruemmer
Authors: Francisco Cruz-Gandarilla, Richard Penelle, Hector Mendoza León, Thierry Baudin, J. Gerardo Cabañas-Moreno
Authors: J.H. Seo, Jong Kweon Kim, Yong Bum Park
Abstract: The texture evolution due to grain growth that takes place during annealing was investigated in nanocrystalline Fe-Ni alloys fabricated by using an electroforming method. In the current materials, the as-deposited textures were of fibre-type characterized by strong <100>//ND and weak <111>//ND components, and the occurrence of grain growth during annealing resulted in the strong development of the <111>//ND components with a significant decrease of the <100>//ND components. It was clarified that abnormal grain growth plays an important role on the evolution of the microstructures and textures. The abnormally grown grains were observed using orientation imaging microscopy in the early stages of grain growth, and their morphological features have been discussed.
Authors: Stuart I. Wright, John Bingert, Thomas A. Mason, Ryan J. Larsen
Authors: Jean-Christophe Glez, Julian H. Driver
Authors: David P. Field, Tracy W. Nelson, David J. Dingley
Authors: Bae Kyun Kim, Jerzy A. Szpunar, Alexandre P. Zhilyaev
Authors: Francisco Cruz-Gandarilla, Thierry Baudin, Marie Helene Mathon, Richard Penelle, Hector Mendoza León, J. Gerardo Cabañas-Moreno
Abstract: The present work is an attempt to understand the recrystallisation mechanisms in Fe-3% Si alloys used in transformer cores. After secondary recrystallisation silicon steels exhibit a Goss texture with a more or less important spread depending on the details of the processing route, namely, Conventional Grain Orientation CGO or High Permeability Hi-B. The mechanisms of Goss grain formation during hot rolling and primary recrystallisation, as well as those controlling the first steps of abnormal growth, are not yet well understood. The present work mainly deals with texture characterization of the hot rolled state. Surface, quarter and half thickness samples are prepared from hot-rolled sheet. Global and local textures are characterized by neutron diffraction and electron backscattered diffraction, respectively. The Orientation Distribution Functions and the volume fraction of the different texture components are calculated. The components from global texture measurements are (001)[1-10], (112)[1-10] (α fiber ), (011)[100] (Goss) and (111)[1-21] (111) [1-10](γ fiber). EBSD measurements have shown large variations of texture from the surface to the half thickness of the sheet. These local measurements are related to the global results by rotation about the transverse direction. Moreover, the grain size appears to be inhomogeneous.
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