Abstract
In this paper, the effect of metal-to-metal contact from the application of plant-based lubricants, RBD palm olein and jatropa were investigated by cold work forward plane strain extrusion experiments. A pair of taper die and a symmetrical workpiece (billet) was placed inside extrusion rig which acted as main experimental apparatus. The billet material was annealed pure aluminum A1100 with radius 5 mm in deformation area. The experimental result shows that the lower viscosity index, will lead to lower friction effect to the deformed area, as well as product area.
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