Abstract
TIG welding of 12 mm thick plates of MANET II steel was accomplished using filler material of the same composition. Tensile tests, at a constant displacement rate of 0.1 mm min −1 (corresponding to an initial strain rate of 1.1 × 10 −4 s −1), were carried out on specimens consisting solely of the weld, HAZ and bulk material under vacuum and liquid Pb17Li at 250 and 400°C. The post-weld heat treatment (750°C/4 h air cooled) which was given to the welded plates was sufficient to prevent any liquid metal embrittlement. The presence of oxide inclusions and pores in the weld reduced the extent of plastic strain at rupture exhibited by some of the welds.
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