Abstract
For laser hardening the metallurgy in the generated heat affected zone is critical. For laser welding, the resulting mechanical properties of the product depend in addition on the shape and on the imperfections of the processed cross section. Metallurgy, shape and imperfections are determined by heat conduction, in particular by resolidification, by diffusion and by the crystallographic material behaviour, governed by the local thermal cycle of the material. In this chapter, a brief survey of the physical mechanisms responsible for the metallurgy and for imperfections at the macro- and micro-scale are given, mainly referring to ferritic low alloy steel as the most relevant material. Many aspects are relevant to both welding and hardening, while some aspects are process-specific. For certain phenomena selected mathematical models will be presented that enable quantitative calculation and description of the phenomena.
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Kaplan, A. (2017). Metallurgy and Imperfections of Welding and Hardening. In: Dowden, J., Schulz, W. (eds) The Theory of Laser Materials Processing. Springer Series in Materials Science, vol 119. Springer, Cham. https://doi.org/10.1007/978-3-319-56711-2_8
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DOI: https://doi.org/10.1007/978-3-319-56711-2_8
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