Advances in techniques for determination of susceptibility of welds to stress corrosion cracking (KISCC)

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Stress corrosion cracking (SCC) is a dangerous form of environment assisted degradation. Threshold stress intensity factor for SCC (KISCC), an important parameter in design and prediction of life of component, is a stress intensity limit below which any crack can not propagate in corrosive environment. Accurate determination of KISCC is vital for predicting life of a component. Welded components often suffer from SCC in the heat affected zone (HAZ). Determination of KISCC of narrow HAZ of actual welds is difficult with conventional techniques. Cracks in the specimens for these techniques can propagate out of HAZ plane. This paper describes a new simple, relatively fast, and inexpensive fracture mechanics-based technique (named circumferential notch tensile (CNT) technique), and its use in testing welded specimens.

Original languageEnglish
Title of host publicationWeld Cracking in Ferrous Alloys
PublisherWoodhead Publishing Limited
Number of pages13
ISBN (Print)9781845693008
Publication statusPublished - 2009

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