SYMPOSIA PAPER Published: 01 January 1996

Irradiation Effects on Base Metal and Welds of 9Cr-1Mo (EM10) Martensitic Steel


The effects of fast neutron irradiation on the mechanical behaviour of base metal and welds of 9Cr-1Mo (EM10) martensitic steel have been studied. Two types of weldments have been produced by TIG and electron beam techniques. Half of samples have been post-weld heat treated to produce a stress-relieved structure. The irradiation has been conducted in the Phenix reactor to doses of 63 – 65 dpa in the temperature range 450 – 459 °C. The characterization of the welds, before and after irradiation, includes metallographic observations, hardness measurements, tensile and Charpy tests. It is shown that the mechanical properties of the welds after irradiation are in general similar to the characteristics obtained on the base metal, which is little affected by neutron irradiation.

Author Information

Alamo, A
CEREM/DECM/SRMA, Gif-sur-Yvette, France
Séran, JL
CEREM/DECM/SRMA, Gif-sur-Yvette, France
Rabouille, O
DRN/DMT/SETIC, Gif-sur-Yvette, France
Brachet, JC
CEREM/DECM/SRMA, Gif-sur-Yvette, France
Maillard, A
CEREM/DECM/SRMA, Gif-sur-Yvette, France
Touron, H
CEREM/DECM/SRMA, Gif-sur-Yvette, France
Royer, J
DRN/DMT/SETIC, Gif-sur-Yvette, France
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Developed by Committee: E10
Pages: 761–774
DOI: 10.1520/STP16507S
ISBN-EB: 978-0-8031-5328-8
ISBN-13: 978-0-8031-2016-7