I.E. French
Australian Department of Defence
Cabin pressurizationUltimate tensile strengthHydrostatic equilibriumDeformation (engineering)Transmission electron microscopyCoalescence (physics)DimpleDiscontinuity (geotechnical engineering)Composite materialMetallurgyMaterials scienceStructural materialShear zoneScanning electron microscopeTrough (geology)Shear bandAlloyBrassHydrostatic pressureTensile fractureFracture (geology)CarbonAluminiumMachiningCarbideCopperCrackingFracture mechanicsCritical valueForensic engineeringShear (sheet metal)Void (astronomy)Shear (geology)Fracture toughness
Publications 8
The mechanism of the shear mode of ductile fracture has been investigated in sheet tensile specimens of an α brass containing few inclusions. The techniques of optical metallography, scanning electron microscopy and transmission electron microscopy of both thin foils and replicas were all used in order to obtain as complete a picture of the fracture mechanism as possible. It was found that a zone of shear deformation, made up of many intense shear bands, developed across the specimen neck and fr...
23 CitationsSource
Abstract The influence of superimposed hydrostatic pressures up to 600 MPa on the tensile fracture mechanism of sheet specimens of α-brass, α-β brass and copper has been studied. Particular attention was paid to the mechanisms leading to the initiation of fracture. At low pressures a common fracture mechanism occurred in all materials which involved the formation of a zone of intense shear deformation followed by fracture due to the development of void-sheets within this zone. At a higher pressu...
35 CitationsSource
The effects of hydrostatic pressures up to 600 MPa on the tensile fracture mechanisms of commercial aluminum and a free machining aluminum-copper alloy have been investigated. Tensile fracture of the commercial aluminum was found to occur by a mechanism leading to double-cup fracture at hydrostatic pressures up to 125 MPa with the pressure causing a progressive delay in the onset of void development. Above this pressure, void development was suppressed and all fractures occurred at chisel points...
22 CitationsSource
#1I.E. FrenchH-Index: 7
#2P.F. Weinrich (Australian Department of Defence)H-Index: 2
Abstract : The tensile fracture of spheroidised plain carbon steels is predominantly initiated by cracking associated with the carbide particles as reported by Liu and Gurland. The increase in the number of voids resulting from such cracking as a function of tensile strain at room pressure has been investigated by Gurland who found that cracking of the carbide particles began in the early stages of plastic deformation. In the present work the development of voids originating from cracks associat...
24 CitationsSource
Abstract : The present note describes some further work on the effect of pressure on the tensile fracture of a leaded alpha + beta brass used previously and an investigation into the fracture strain-pressure relationship of an alpha + beta brass. The purpose of these investigations was to establish whether the discontinuity found in the alpha-brass existed in these materials also.
8 CitationsSource
#1I.E. FrenchH-Index: 7
#2P.F Weinrich (Australian Department of Defence)H-Index: 2
Abstract A detailed study has been made of the effects of hydrostatic pressures in the range 0.1–600 MPa on the tensile fracture strain of an α-brass. Fracture strain has been found to increase linearly with pressure up to 350 MPa, to decrease between pressures of 350 and 375 MPa and to then increase to a constant value at pressures greater than 450 MPa. The abrupt change from linearity of the fracture strain-pressure relationship at a pressure of 350 MPa was found to coincide with the suppressi...
28 CitationsSource
#1I.E. FrenchH-Index: 7
#2P.F WeinrichH-Index: 2
Last. C.W. Weaver (Australian Department of Defence)H-Index: 2
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Abstract The effects of hydrostatic pressures in the range 0.1 to 600 MPa on the tensile fracture of a free machining brass have been studied. In agreement with the results of earlier workers, the natural strain to fracture was found to increase rapidly with pressure for pressures up to 300 MPa, but to increase less rapidly at the higher pressures. The rapid increase in ductility under confining pressures up to 300 MPa is shown to be due to the suppression of void development, by the pressure, u...
32 CitationsSource