Method and system for joining workpieces

Abstract

A method for joining workpieces, each having an engagement surface which may comprise a plurality of alternating peaks and troughs and positioning the workpieces such that a gap is formed between the engagement surfaces. At least one heating element is located in this gap which, when energised, heats heated portions proximal to said peaks to a temperature at which the heated portions are plastically deformable. Heat transfer therefrom into the workpieces is limited, and an inert atmosphere covers the heated portions at least. When the heated portions are at working temperature, the heating element(s) is removed from the gap, and one or both of the workpieces is subjected to a translocation motion, to engage the engagement surfaces with each other, then urging the engagement surfaces together and moving one or more of the surfaces relative to the other, for at least partial plastic deformation of the heated portions.

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