Microstructural Developments in Neutron-Irradiated Mild Steel Submerged-Arc Weld Metal

The microstructures of Magnox submerged-arc welds have been characterised to investigate the effects of surveillance and accelerated irradiation at temperatures in the range 190-290 deg C. The radiation hardening and embrittlement is influenced by the precipitation of copper from solid solution. Man...

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Published in:Journal of nuclear materials 1992-09, Vol.205, p.198-205
Main Authors: Buswell, J T, Bischler, P J E, Fenton, S T, Ward, A E, Phythian, W J
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creator Buswell, J T
Bischler, P J E
Fenton, S T
Ward, A E
Phythian, W J
description The microstructures of Magnox submerged-arc welds have been characterised to investigate the effects of surveillance and accelerated irradiation at temperatures in the range 190-290 deg C. The radiation hardening and embrittlement is influenced by the precipitation of copper from solid solution. Manganese has been found in the Cu-rich precipitates, together with an indication of phosphorus. The precipitates have structure coherent with the ferrite matrix and maintain a constant mean diameter during extended irradiation. Evidence has been obtained indicating that dislocation loops contribute to a matrix damage component in these welds.
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title Microstructural Developments in Neutron-Irradiated Mild Steel Submerged-Arc Weld Metal
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