Fracture Toughness of Thick Steel Plates for Shipbuilding

Abstract:

In this study, the effect of thickness on the fracture toughness of the steel plate with the thickness of 80mm has been investigated by the wide plate tensile test and ESSO test. The fracture toughness for crack initiation and propagation was evaluated quantitatively for the full thickness specimen. It was found that EH-36 grade steel with the thickness of 80mmt showed the KIC value of 164kgf/mm1.5 at -145°C. Also, large-scale ESSO test result showed that the steel with the thickness of 80mm had 520kgf/mm1.5 at -10°C. Although it was known that the fracture toughness decreases with the increase of the plate thickness, EH-36 grade steel with the thickness of 80mm had enough values of fracture toughness to prevent the crack initiation and arrest the brittle crack propagation.

• Periodical: Materials Science Forum (Volumes 580-582)
• Pages: 89-92
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.580-582.89
• Online since: June 2008
• Authors: Joon Sik Park, B.Y. Jung, Hiroshi Yajima, Jong Bong Lee
• Keywords: Brittle Fracture, Crack Arrest, Crack Initiation, ESSO Test, Fracture Toughness, Plate Thickness, Shipbuilding, Wide Plate Tensile Test

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