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- Title
Use of a Ring DWTT Specimen for Determination of Steel NDT from Pipe of Diameter Less than DN500.
- Authors
Ben Amara, M.; Capelle, J.; Azari, Z.; Pluvinage, G.
- Abstract
It has become recognized that the drop weight tearing test (DWTT) energy better represents the ductile fracture resistance of pipe steels since it utilizes a specimen that has the full thickness of the pipe and has a fracture path long enough to reach steady-state fracture resistance. However, the API 5L code does not require it for pipe sizes less than DN500. The aim of this paper is to propose a DWTT specific to small diameter pipes based on a new specimen, the ring drop weight tearing test (RDWTT) specimen; to evaluate the transition temperature T and nil ductility temperature of the pipe steel API 5L X65; to introduce the transition temperature T in the transition temperature material master curve of the API 5L X65 steel; and to compare the prediction of the crack ductile extension in a pipe based on the RDWTT's energy and crack tip opening angle in the case of the steel API 5L X65.
- Subjects
DUCTILE fractures; BONE fracture prevention; IMPACT testing of metals; STEEL pipe; TRANSITION temperature
- Publication
Journal of Failure Analysis & Prevention, 2016, Vol 16, Issue 6, p941
- ISSN
1547-7029
- Publication type
Article
- DOI
10.1007/s11668-016-0194-y