SYMPOSIA PAPER Published: 01 January 1994
STP23945S

The Radiation Hardening and Embrittlement of a Mild Steel Submerged-Arc Weld

Source

This paper provides details of accelerated irradiation experiments on a Magnox mild steel submerged-arc weld at mean irradiation temperatures of 165°C and 269°C. The irradiation-induced changes in mechanical properties and weld microstructure have been determined. Irradiation increased the 40J transition temperature and the yield stress. The increase in transition temperature at a given dose was rather higher in the lower temperature irradiations. Irradiation-induced precipitates of about 2nm diameter were produced in both series of irradiations. Small angle neutron scattering data indicated a precipitate composition of about 75Cu25Mn (at%). Electron microscopy confirmed the presence of copper-rich precipitates of that size. The irradiation dose ranges covered the development stage of the precipitation. The directly measured and (yield stress) derived transition shift data were interpreted satisfactorily using a mechanistically based model involving a matrix damage component and a component attributable to copper precipitation.

Author Information

Buswell, JT
Nuclear Electric plc, Berkeley Technology Centre, Berkeley, Glos., United Kingdom
Bolton, CJ
Nuclear Electric plc, Berkeley Technology Centre, Berkeley, Glos., United Kingdom
Wootton, MR
Nuclear Electric plc, Berkeley Technology Centre, Berkeley, Glos., United Kingdom
Bischler, PJE
Nuclear Electric plc, Berkeley Technology Centre, Berkeley, Glos., United Kingdom
Jones, RB
Nuclear Electric plc, Berkeley Technology Centre, Berkeley, Glos., United Kingdom
Jones, LT
Nuclear Electric plc, Berkeley Technology Centre, Berkeley, Glos., United Kingdom
Phythian, WJ
AEA Technology, Harwell Laboratory, Oxon., United Kingdom
Sinclair, RR
AEA Technology, Harwell Laboratory, Oxon., United Kingdom
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Details
Developed by Committee: E10
Pages: 332–351
DOI: 10.1520/STP23945S
ISBN-EB: 978-0-8031-5262-5
ISBN-13: 978-0-8031-1488-3