The hot compression tests on stainless steel were carried out on a thermo-mechanical simulator in the strain rate of 1 s-1, 0.1 s-1, 0.01 s-1, 0.001s-1 and the deformation temperature 1000 oC.
A 10,000 – ton (8.88 x107 N) press is used to forge stainless steel cylindiral rods that are 0.15 m high having a X-sectional area equal to 0.10 m2. Assume a flow stress of 600 MPa is maintained throughout the forging process under conditions where µ = 0.1 at room temperature.
What load is required for forging process at the beginning?
What could be the the largest flow stress this press can handle if this metal piece is pressed to 50% of its height?
The same steel but with a square x-sectional area is hot forged at 1000 oC to half of its original height by a platen velocity at 0.75 cm/s. Use the above graph to determine C and m values. Show your C and m calculations on excel. Excel spreadsheet will be submitted. Graphite is used as lubricant between the platen and the workpiece. Calculate forging force. Use the graphs, chart and table where necessary.
The hot compression tests on an Aluminum alloy were carried out on a thermo-mechanical simulator in the strain rate of 0.01 s-1, 0.1 s-1, 1.0 s-1, 10 s-1 at various deformation temperatures.
The hot compression tests on an Aluminum alloy were carried out on a thermo-mechanical simulator in the strain rate of 0.01 s-1, 0.1 s-1, 1.0 s-1, 10 s-1 at various deformation temperatures.
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