Transition temperature tests show fracture behavior

Journal Article · Tue Apr 23 04:00:00 EST 1985 · Oil Gas J.; (United States)

OSTI ID:5355870

Masey, W A; Junker, C; Koch, F O; Kugler, J; Peeck, A; Peters, P A; Seifert, K; Voght, G H

The objective of the research reported in this article was to examine the predictability of full-scale fracture behavior through the use of the fullthickness drop weight tear tests (DWTT) currently employed to specify high toughness, high-strength, lowalloy (HSLA) line pipe. The DWT tests studied are the standard pressed notch DWTT as specified by the American Petroleum Institute (DWTT-API), a recently developed precracked DWTT (DWTT-PC), and fatigue cracked DWTT (DWTTFC). The study was conducted at the brittle-ductile transition temperatures of the pipe steels to see which DWT test specimen most accurately defines the full-scale transition temperature. The main parameter of comparison between the full-scale tests and the DWT tests is the percent shear area appearance of the fractured surface. For normalized steels and smaller wall thickness, earlier investigations have shown that a good correlation exists between results of such fullscale tests and DWT-API tests. However, it must be verified that this correlation is also valid for modern HSLA steels and heavy wall thickness. From 17 pipes, 14 were produced from thermomechanically treated materials, and 3 were quenched and tempered.

• Research Organization: Battelle Memorial Institute, Columbus, Ohio
• OSTI ID: 5355870
• Journal Information: Oil Gas J.; (United States), Journal Name: Oil Gas J.; (United States) Vol. 83:16; ISSN OIGJA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
022000* -- Petroleum-- Transport
Handling
& Storage
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
BRITTLE-DUCTILE TRANSITIONS
DESTRUCTIVE TESTING
DIMENSIONS
ENERGY SOURCES
FOSSIL FUELS
FRACTURE MECHANICS
FUELS
HEAT TREATMENTS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
MECHANICS
PETROLEUM
PHYSICAL PROPERTIES
PIPELINES
QUENCHING
SHEAR
STEELS
TEMPERING
TESTING
THERMODYNAMIC PROPERTIES
THICKNESS
TRANSITION TEMPERATURE
TRANSPORT