Authors: V.Yu. Filin, D.M. Artemyev, M.A. Gusev, A.V. Larionov
Abstract
Testing practice as per the traditional DWTT procedure is discussed in the present article. This test is aimed at the assessment of the ductility of pipe and rolled plate metal by shear/cleavage fracture appearance. There have been some issues observed in test result interpretation for modern high-strength steels intended for thick-walled underwater pipelines and hull plates for ice class Arc ships, especially for TMCP steels. The history and perspective ways to improve the test method are reviewed including the use of a quantitative criterion for DWTT based on technical achievements in the field of test instrumentation. It is shown that attempts to set a certain required DWTT impact energy are methodologically problematic and unreliable as to the range of experimental data. It is suggested that the research should progress simultaneously in two directions: improvement in the applied methodology and development of a more accurate quantitative criterion based on the application of fracture mechanics.
Keywords: drop weight tear test, fracture appearance, quantitative criterion, crack tip opening angle, CTOA.
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About authors:
Filin Vladimir - PhD, NRC Kurchatov Institute - CRISM Prometey, 49, Shpalernaya str., 191015, St. Petersburg, Russia, e mail: npk3@crism.ru
D.M. Artemyev - CRISM Prometey, 49, Shpalernaya str., 191015, St. Petersburg, Russia
M.A. Gusev - CRISM Prometey, 49, Shpalernaya str., 191015, St. Petersburg, Russia
A.V. Larionov - CRISM Prometey, 49, Shpalernaya str., 191015, St. Petersburg, Russia
Issue: 50/51 (2018)
For citation: V.Yu. Filin, D.M. Artemyev, M.A. Gusev, A.V. Larionov. Drop weight tear test for materials of subsea pipelines and "Arc"-steel rolled products. Research Bulletin by Russian Maritime Register of Shipping. 2018, No. 50/51, pp. 41-52.* * *
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