Modelling approach towards tailored grain structure in laser processing: Modellierungsansatz für eine maßgeschneiderte Kornstruktur in der Laserbearbeitung. Issue 12 (10th January 2018)

• Record Type: Journal Article
• 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.
• Is Part Of: Materialwissenschaft und Werkstofftechnik. Volume 48:Issue 12(2017)
• Page Start: 1226
• Page End: 1234
• Publication Date: 2018-01-10
• Subjects: Laser processing -- grain structure -- modelling -- simulation; Laserbearbeitung -- Kornstruktur -- Modellierung -- Simulation; Materials -- Periodicals; Materials -- Testing -- Periodicals; 620.1
• DOI: 10.1002/mawe.201700150
• Languages: English
• ISSNs: 0933-5137

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.