Shear zone properties of inertia friction welds

Stevens, Peter Alastair (2015). Shear zone properties of inertia friction welds. University of Birmingham. Eng.D.

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Abstract

Inertia weld process variables arc characterised using empirical relations that arc functions of the weld input parameters, allowing the variables to be predicted for any future production welds. The techniques for establishing the empirical relations can be applied to future alloy system for inertia welding by using significantly refined test matrices, reducing the development costs of new welds.

Power loss in the bearings for two inertia welding machines is characterised by using hydrostatic bearing theory and several experimental techniques. This allows energy-based empirical relations for new alloy systems to be developed using sub-scale welds only, reducing the cost of implementing future production welds.

Average temperature and now stress of the plasticised zone of welds is used to characterise the average shear zone thickness. Two separate models arc developed and arc found to correlate well with each other and with experimental observations. This work helps to improve the mechanistic understanding of inertia weld interfaces and can be used in computational fluid dynamics models to characterise the bond-line cleaning mechanism.

Type of Work:

Thesis (Doctorates > Eng.D.)

Award Type:

Doctorates > Eng.D.

Supervisor(s):