Experimental study on dieless drawing of Nickel–Titanium alloy

Dieless Drawing of Bars, Rods, Tubes, and Wires

“…Twohig et al (28) investigated the effect of a dieless drawing process on commercial grade Nickel-Titanium rods by varying the established critical process parameters of temperature, cooling rate, drawing velocity, and heating/cooling velocity. The rods were successfully dieless drawn with a maximum steady state reduction in cross-sectional area of 54%.…”

“…This oxidation layer has the potential to aid in the lubrication of subsequent cold-working operations of the dieless drawn rods. Coupling the thermomechanical effects of the dieless drawing process with a cold drawing processing step has the potential to produce a NiTi wire in fewer passes, and therefore, at a reduced cost (28). In a study performed by Furushima et al, the deformation limit of SUS304 alloy tubes of outer diameter 2mm was evaluated by coupled thermomechanical finite element analysis and dieless drawing experiments.…”

Formability Analysis and Oxidation Layer Effects in Dieless Drawing of Stainless Steel Wires

“…Some research about dieless drawing machines has been reported. For example, Twohig et al [13] used a forward non-continuous dieless drawing machine to investigate dieless drawing of a 5 mm-diameter nickel-titanium rod. The effects of different forming parameters on the changes in microstructure were understood through hardness testing and microstructure observation.…”