Effect Of Orientation And Loading Rate On The Toughness Transition Curve
Of A Ship Steel
Author(s)
X. Wu, J. Morrison, & D.A. Hull
Abstract
Effect of orientation and loading rate on the
toughness transition curve of a ship steel
X. Wu% J. Morrison', & D.A. Hull"
''DREA Dockyard Laboratory (Pacific), Canada.
'Engineering Material Research, Canada.
Abstract
Toughness measurements are needed to assess the risk of brittle fracture in
warship hulls under operational conditions. This demands laboratory testing at
minimum service temperatures and loading rates equivalent to hull impact
events. However plate thickness is insufficient to permit valid Kjc determinations
at the required strength and toughness levels. The master curve approach
specified in ASTM Standard El921 provides an alternative means of quantifying
the cleavage fracture resistance in the brittle-to-ductile transition temperature
regime. Limited replicate testing yields a reference temperature T<,. It also
defines a material-specific fracture toughness master curve, and a lower bound
failure probability, which can be applied to material selection
Keywords
Related Book
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