Finally an approach for the impact on relevant peak temperatures in the heat affected zone is outlined.Ĩth International Conference on Photonic Technologies LANE 2014 It is shown that resulting magnitudes of residual stresses vary between 248 N/mm2 and 550 N/mm2. Different continuous-cooling-transformation-diagrams (cct–diagrams) of specific austenite grain sizes for temperatures between transformation point AC3 and melting temperature are implemented in the model. In this paper simulations of thermal forming processes, using S355 steel, are presented. In order to get an embraced understanding of such effects numerical simulations of phase-transformations are mandatory. Higher temperatures lead to larger austenite grains, leading to increased times for transformation. Times needed for transformation are affected by the initial austenite grain size, while the prevailing peak temperature influences austenite grain growth. Nevertheless, the influences of thermal induced phase-transformation on residual stresses and strength have not been fully observed. Nowadays thermal forming processes of steel are state of the art in industrial applications. Abstract of research paper on Materials engineering, author of scientific article - Fabian Klaproth, Frank Vollertsen
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