College Park, Maryland      June 6 - 10 , 2004

W2-A1 (1:30 PM): Residual Stress and Texture in Engineering Materials (Invited)

J. H. Root (National Research Council, Chalk River, Ontario, Canada)

Because neutrons penetrate easily through many engineering materials, neutron diffraction can often be applied to determine distributions of stress or crystallographic texture, non-destructively, inside intact engineering components. Experimental knowledge obtained by neutron diffraction has refined ideas about the deformation of polycrystalline materials and validated simulations of material behaviour during processing, service and failures. This knowledge has proven to be of great interest to various industries, because it can address issues of safety, regulations, competitiveness and market penetration. In parallel, neutron diffraction measurements of residual stress and texture have opened new opportunities for fundamental materials science, attracted a new user community to the sphere of neutron scattering and stimulated the development of new neutron instruments and methods. This presentation will provide some illustrations of residual stress and texture studies at Chalk River Laboratories, where materials science and engineering projects occupy more than one third of available neutron beam time. We shall consider the state of the art, as practised at neutron facilities worldwide, and list some of the experimental and scientific challenges in this field.

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