Deep drawing of aluminium–steel tailor-welded blanks
Deep drawing of aluminium–steel tailor-welded blanks
: Abstract
Aluminium and steel blank sheets can be welded together to produce tailor-welded blanks with strength mismatch. These tailorwelded blanks are applied in aerospace and automotive industries. In this investigation, finite element simulations were carried out using home code DD3IMP to determine the formability characteristics of aluminium–steel tailor-welded blanks. Aluminium (AA6016-T4) blank sheet was combined with a range of steel blank sheets namely, mild-steel (DC06) and high strength steels (AISI-1018, HSLA- 340, and DP600) to form four different Al–steel tailor-welded models. Aluminium, being relatively weaker, has the tendency to flow more than steel. In particular, dual-phase steel offers the maximum resistance to flow and mild-steel offers lowest resistance. A segmented blank holder allows the application of different forces on aluminium and steel sheet segments in the tailor-welded blank. Different blank holder forces enhance the formability of tailor-welded blank as well as control the draw-in. The simulation results indicate that even with large dissimilarities in material properties, Al–steel tailor-welded blanks can produce superior deep drawn parts.
Source : www.elsevier.com/locate/matdes
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