NDLI: The Relationship of Radiation Embrittlement and Swelling for Austenitic Steels for WWER Internals

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Margolin, B. Z. Kursevich, I. P. Sorokin, A. A. Neustroev, V. S.
Copyright Year	2009
Abstract	To investigate the effect of swelling upon mechanical properties of irradiated austenitic steel the investigations were conducted with steel 18Cr-10Ni-Ti and its weld irradiated up to same damage doses in two different temperature ranges: at the irradiation temperature of 330÷340°C when swelling is practically absent and at 400÷450°C when a considerable swelling level of 3÷13% is observed. Basing on the investigation results the temperature dependences of tensile properties of irradiated metal were constructed and analyzed. Fracture surfaces for ruptured specimens were examined by SEM. Comparative investigations of magnetization of irradiated metal at different irradiation temperatures were performed. It was concluded from the performed analysis of the results that in highly irradiated austenitic steel with considerable swelling a ductile to brittle transition is observed, which is caused of the Feγ→Feα phase transformation. The investigations of magnetization of metals with different swelling, as well as on the available literature data confirm a possibility of the Feγ→Feα phase transformation under considerable radiation swelling. The criterion is proposed allowing one to determine the radiation conditions under which the Feγ→Feα transformation make it possible a brittle fracture. The mechanism resulting in a sharp decrease of the ultimate tensile strength of highly irradiated metal is considered.
Sponsorship	Pressure Vessels and Piping
Starting Page	939
Ending Page	948
Page Count	10
File Format	PDF
ISBN	9780791843697
DOI	10.1115/PVP2009-77078
e-ISBN	9780791838549
Volume Number	Volume 6: Materials and Fabrication, Parts A and B
Conference Proceedings	ASME 2009 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2009-07-26
Publisher Place	Prague, Czech Republic
Access Restriction	Subscribed
Subject Keyword	Temperature Magnetization Metals Irradiation (radiation exposure) Brittle fracture Embrittlement Mechanical properties Fracture (materials) Steel Brittleness Phase transitions Tensile strength Fracture (process) Radiation (physics) Damage
Content Type	Text
Resource Type	Article

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