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- Title
Modelling approach towards tailored grain structure in laser processing.
- Authors
Pustal, B.; Vossel, T.; Bührig‐Polaczek, A.; Arntz, D.; Haeusler, A.; Gillner, A.; Poprawe, R.; Schwedt, A.; Mayer, J.; Jansen, U.; Schöler, C.; Schulz, W.
- Abstract
Abstract: Due to the change in grain size during laser processing in the heat‐affected zone and the solidifying material, the potential of cracking, surface hardening, and decrease in weldability, corrosion resistance and fatigue life may result. It is shown that through combining state‐of‐the‐art temperature simulation of laser processes with thermo‐mechanical volume averaging grain formation simulation, the resulting grain density can be predicted within the order of magnitude found in the two experiments carried out for laser fusion cutting and spot welding of A356. However, fundamental knowledge about the grain density function during rapid solidification, the prediction of the transition from epitactic growth to globular grains and defined validation experiments are needed in order to provide a realistic virtual microstructure.
- Subjects
GRAIN size; SOLIDIFICATION; CORROSION resistance; WELDABILITY; MECHANICAL behavior of materials
- Publication
Materialwissenschaft und Werkstoffechnik, 2017, Vol 48, Issue 12, p1226
- ISSN
0933-5137
- Publication type
Article
- DOI
10.1002/mawe.201700150