Journal Published Online: 21 August 2023
Volume 51, Issue 6

Experimental Evaluation of K IEAC of a Carbon Steel Using the Pin-Loaded SENT Geometry

CODEN: JTEVAB

Abstract

The experimental determination of the threshold stress intensity factor for environment-assisted cracking (KIEAC) is described by several standards, which allow the use of different specimen geometries and methodologies for crack length estimation. In some cases, the combination of structure, specimen size, or both, main loading direction, and crack orientations of the component that need to be characterized limit the use of standardized geometries. Consequently, alternative geometries must be used. In this study, fatigue pre-cracked pin-loaded single edge notched tension specimens as defined by BS 8571:2018, Method of Test for Determination of Fracture Toughness in Metallic Materials Using Single Edge Notched Tension (SENT) Specimens, were applied for the experimental evaluation of the KIEAC of a carbon steel. The specimens were tested in deaerated substitute ocean water solution saturated with carbon dioxide at 40°C and at 1 and 10 bar (100 and 1,000 kPa) under constant load conditions with incremental (step) loading. The crack length during the tests was monitored by direct current potential drop, which was helpful for defining the applied K corresponding to the onset of subcritical crack growth (KIEAC). Additionally, fractographic analysis of KEAC specimens and results from the fracture toughness evaluation of this material in air at room temperature have also been reported.

Author Information

Teixeira Oliveira de Menezes, João
Department of Mechanical Engineering, Milano, Italy
Braun Poloponsky, Ingrid
Baker Hughes Research Center, Rio de Janeiro, Brazil
Castrodeza, Enrique Mariano
Department of Mechanical Engineering, Milano, Italy
Pages: 17
Price: $25.00
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Details
Stock #: JTE20230034
ISSN: 0090-3973
DOI: 10.1520/JTE20230034