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Microstructural investigation of the sheet metal DC05 for tailored blanking
Author(s) -
Doege Eckart,
Dohrmann Hinrich
Publication year - 1997
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199700556
Subject(s) - blanking , sheet metal , materials science , welding , metallurgy , finite element method , deep drawing , forming processes , heat affected zone , base metal , grain size , tola , mechanical engineering , composite material , structural engineering , engineering
Tailored blanks are being employed more and more in industrial deep drawing processes. For the layout of sheet metal part tooling it is important to predict the feasibility of the forming process. Substantial achievements have been made in this direction by means of the finite element method (FEM). Some basic requirements are correct descriptions of the material behaviour of the welded sheet metal in the base material as well as in the seam and the heat affected zone. It can be observed that the seam itself is considerably hardened. For the crack prediction during forming processes, the weld has to be considered in numerical simulation. Thus, investigations are performed to characterise the change of material properties in DC05 sheet metal. Dilatometric measurements as well as the grain size development are examined closer. It can be summarised that the resulting Widmanstätten structure is responsible for the hardness increase in the laser beam molten area, while the grain size has a greater influence in the heat affected zone.