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...

Full description

Saved in:
Bibliographic Details
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
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0022-3115