Abstract
Abstract Diffusion bonding of oxide dispersion strengthened ferritic steel PM2000 1.2 mm thickness plates sandwiched by aluminium foils was carried out. This joining was achieved under laboratory air at temperatures less than 660 °C by simultaneously applying heat and sufficient compression of about 210 MPa to give a high level of plastic deformation to the Al interlayer. The resulting microstructures and phases at the interface were characterised using scanning and transmission electron microscopy and microanalyses. The formation of intermetallic phase type FeAl was detected close to the interface and the FeAl3 further away on the aluminium side. The bonded samples were heat treated under a special regime and bend tested. In the treated samples Fe–Cr compounds were noticed. The corrosion study of the heat-treated samples in laboratory air at 950 °C demonstrated a high temperature corrosion resistance.
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