On the thermo-mechanical events during friction surfacing of high speed steels
This paper is concerned with the friction surfacing of high-speed steels, BM2, BT15 and ASP30 onto plain carbon steel plate. The events that the matrix and carbides experience as the coating material pass from the coating rod to the substrate, in forming the coating, is described. The coating is observed to harden automatically within a few seconds of being deposited onto the cold substrate. This autohardening is observed to be an inherent feature of the friction surfacing process and the only post-coating heat treatment required is tempering, as with traditionally hardened high-speed steels. The mechanism of autohardening is discussed in terms of the mechtrode/coating/substrate thermal system.
Linear Friction Based Processing Technologies for Aluminum Alloys: Surfacing, Stir Welding and Stir Channeling
The friction based processing technologies encloses some of the most significant solid state manufacturing technologies for producing structural components in aluminium alloys. In the present chapter three processes will be depicted: i) Friction Surfacing (FS); ii) Friction Stir Welding (FSW) and iii) Friction Stir Channeling (FSC). These processes covers a large range of applications and share the characteristic of being a machine tool based processes having one rotating tool that travels over the surface of the components to be processed.
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