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Numerical analysis of micro-stress evolution in dual phase polycrystals |
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| Authors: | Jan Očenášek Christian Krempaszky Julia Repper Ewald Werner |
| Institution: | 1. Christian Doppler Laboratorium für Werkstoffmechanik von Hochleistungslegierungen, Lehrstuhl für Werkstoffkunde und Werkstoffmechanik, TU München, 85747 Garching, Germany;2. Christian Doppler Laboratorium für Werkstoffmechanik von Hochleistungslegierungen, Lehrstuhl für Werkstoffkunde und Werkstoffmechanik, TU München, 85747 Garching, Germany
Head of the CDL of Material Mechanics of High Performance alloys;3. Lehrstuhl für Werkstoffkunde und Werkstoffmechanik, TU München, 85747 Garching, Germany |
| Abstract: | Diffraction methods gain much attention in nondestructive residual stress analysis. While the determination of macroscopic residual stresses is of main interest, the presence of microscopic residual stresses arising from microstructural characteristics of the material can influence the analysis of the acquired data. The residual stress measurements by neutron diffraction on IN718 pancake forgings are analyzed in this work. We present a simple mechanical model supporting the hypothesis that the phase average of the microscopic residual stress accumulated during the forging process is anisotropic causing anisotropy of the macro stress free reference lattice parameter. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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