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An investigation of the solid-phase joining of iron was undertaken as part of an effort to extend the applicability of dispersion- and/or work-hardened steels, mainly in the form of laminates or composite materials. Because the mechanical properties of these steels can be degraded by high-temperature exposure, a low-temperature joining process is to be greatly desired. The aims of this investigation were to determine the effects of various surface treatments on the joining pressures, temperatures, and times required to produce mechanically strong, metallurgically sound interfaces. This paper presents some results on the joining behavior of vacuum outgassed, 99.8 per cent iron specimens, the surfaces of which were mechanically polished to a roughness of about 0.3 micron.
Johnson, T. E.
United States Steel Corporation,