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Fracture toughness of MAG welds in pulsed current of API 5L AX65M thermomechanical treated steel by Ion Mitelea; Dinu Simionescu; Corneliu Marius Crăciunescu; Ion Dragoş Uţu is a Engineering article available to read on EtoBox.

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## Abstract Prediction of unstable fractures or growth of existing cracks represents the fundamental problems in fracture mechanics. Experimental measurement of the propagation force of pre-cracks obtained by fatigue plays an important role in this prediction. The stress intensity factor at the crack tip (K~IC~), crack tip opening displacement (CTOD) and the crack tip opening angle (CTOA) are the most recognized parameters used in fracture mechanics [1]. This paper is focused on the determination of the fracture toughness, CTOD in the weld and the interface between heat affected zone/fusion line of the API 5L X65M steel pipe lines having a diameter of 42′′ (1066.8 mm), a wall thickness of 31.75 mm, welded by the MAG process. To determine the crack tip opening displacement (CTOD), specimens subjected to bend in three-points (SENB = single edge notched bend) were used.

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Author

Ion Mitelea; Dinu Simionescu; Corneliu Marius Crăciunescu; Ion Dragoş Uţu

Publisher

Walter de Gruyter GmbH

Published

2020

Language

EN

Field

Engineering (Physical Sciences)