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College Park, Maryland      June 6 - 10 , 2004

WP54: Residual Stresses by Neutron Diffraction and Microstructural Characterisation by SANS of Materials and Components of Technological Interest

Massimo Rogante (Nuclear Engineering Laboratory, DIENCA, University of Bologna, Via dei Colli 16, 40136 Bologna; Rogante Engineering Office, Contrada San Michele, 61 / P. O. Box 189, 62012 Civitanova Marche, Italy)

The adoption of neutron techniques, among the other non-destructive diagnostics, is becoming more and more relevant in studying materials and components of industrial interest. In this paper, neutron diffraction for Residual Stresses (RS) measurements and Small Angle Neutron Scattering (SANS) for microstructural characterisation - especially related to the precipitate distribution - are considered. The basic theoretical aspects and some industrial applications of each technique are reported. In particular, RS determination in weldings, in extruded specimens and in a component for nuclear/traditional energy industry is presented. SANS measurements are finally reported, concerning materials and components for energy and automotive industry.

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