β Scribed by Katherine Tully; John Monaghan
No coin nor oath required. For personal study only.
This paper presents results based on a series of indentation tests (hobbing) performed on supported billets of Coronze, a superplastic alloy of copper, aluminium, silicon and cobalt. The relationship between hobbing force, depth of indentation and strain rate was established. An upper bound technique was used to predict the hobbing pressure ratio and the results are compared with those from the experimental tests. The feasibility of using this material to produce a die for a polymer injection moulding machine was also assessed.
π SIMILAR VOLUMES
The deformation mechanisms and the thermal stability of AZ31 alloy, processed by various routes, have been investigated. Superplastic deformations could be achieved at flow stresses lower than 10 MPa at 375 β’ C and 10 -4 s -1 in the AZ31 alloy with a grain size of 17 m. The thermal stability of seve