SYMPOSIA PAPER Published: 01 January 2002
STP10811S

Validation of Miniature Fracture Toughness Specimens for Material Surveillance

Source

Fracture toughness testing in the elastic-plastic temperature range of material behavior is described in the Master Curve standard ASTM 1921-97. The standard allows measurement of valid fracture toughness values up to KJC= 100 MPa√m with clearly smaller than standard CVN-size specimens for the irradiated material condition. However, a relatively small amount of data measured with miniature specimens of cross-sections 5 mm × 5 mm or 3 mm × 4 mm have been published and hence the utilization of such small specimens is generally not accepted even if the universal specimen size criteria are fulfilled. In this study, the fracture toughness transition temperature T0 has been measured for a high phosphorus content WWER 440 weld coded as W502 both in the non-irradiated and in the irradiated and annealed material conditions. Three-point bend specimens of cross-sections 10 mm × 10 mm, 5 mm × 5 mm and 3 mm × 4mm were used in the study.

Author Information

Valo, M
VTT Manufacturing Technology, Finland
Planman, T
VTT Manufacturing Technology, Finland
Wallin, K
VTT Manufacturing Technology, Finland
Rintamaa, R
VTT Manufacturing Technology, Finland
Ahlstrand, R
FORTUM Engineering Ltd., FORTUM, Finland
Kohopää, J
FORTUM Engineering Ltd., FORTUM, Finland
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Details
Developed by Committee: E10
Pages: 18–32
DOI: 10.1520/STP10811S
ISBN-EB: 978-0-8031-5465-0
ISBN-13: 978-0-8031-2897-2