CoA. Memos: Materials (1963-1966)
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Browsing CoA. Memos: Materials (1963-1966) by Author "Younger, A."
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Item Open Access The behaviour of the aluminium alloy RR58 under combined creep and fatigue conditions. Part 1, the hydraulic combined creep and fatigue machine(College of Aeronautics, 19) Younger, A.; Clifton, T. E.Item Open Access Experimental techniques used in the high temperature heat-treatment of some tungsten-thoria alloys(College of Aeronautics, 1964-12) Younger, A.The high temperature apparatus developed in the Department of Materials for the torsional creep testing of graphite at temperatures up to 3000 oC has been utilised to heat-treat tungsten-thoria alloys at temperatures up to 2500 oC. Modifications to the torsional loading system have enabled some of these heat-treatments to be carried out under an applied stress.Item Open Access The replica strain gauge technique(College of Aeronautics, 19) Castle, W.; Younger, A.; Sollars, A. R.Surface deterioration and dimensional stability tests have been carried out on the low melting point replication alloy described in the first report. A range of alloys for the replication of surfaces at temperatures in the range 120 - 150°C has been prepared and evaluated. Preliminary studies of a cold pressing technique using fully annealed commercial purity aluminium as the replication material have shown that the technique has considerable promise for application over a wide range of temperatures.Item Open Access Room temperature torsional fatigue properties of an iridium: 5% tungsten alloy(College of Aeronautics, 1965-02) Younger, A.; Whitbread, R. C.Introduction Fine wires of an iridium-5% tungsten alloy have been developed as a potential material for use in springs operating at high temperatures. Their suitability for such applications will to a considerable extent depend on satisfactory fatigue properties. The Materials Department of The College of Aeronautics was approached with a view to determining these torsional fatigue properties. This report covers preliminary work into this problem, namely the torsional fatigue behaviour of 0.020 ins. diameter wires at room temperature.