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Stress corrosion cracking
About: Stress corrosion cracking is a research topic. Over the lifetime, 11340 publications have been published within this topic receiving 138157 citations.
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TL;DR: In this paper, the role of addition of nitrite ions in susceptibility of a super duplex stainless steel, SAF 2507 to stress corrosion cracking (SCC) in chloride environment, which has a particular industrial relevance.
41 citations
TL;DR: In this paper, microscopic fatigue crack propagation (FCP) paths in peak-aged unrecrystallized alloy 2090 are identified as functions of intrinsicda/dN- δK kinetics and environment, and a hydrogen embrittlement mechanism is supported by similar brittle crack paths for low pressure water vapor and the electrolyte, the SGC and 100/110 crystallographic cracking modes, the influence of cyclic plastic zone volume (δK), and the benignancy of O2.
Abstract: Microscopic fatigue crack propagation (FCP) paths in peak-aged unrecrystallized alloy 2090 are identified as functions of intrinsicda/dN- δK kinetics and environment. The FCP rates in longitudinal-transverse (LT)-oriented 2090 are accelerated by hydrogen-producing environments (pure water vapor, moist air, and aqueous NaCl), as defined in Part I. Subgrain boundary cracking (SGC) dominates for δK values where the cyclic plastic zone is sufficient to envelop subgrains. At low δK, when this crack tip process zone is smaller than the subgrain size, environmental FCP progresses on or near 100 or 110 planes, based on etch-pit shape. For inert environments (vacuum and He) and pure O2 with crack surface oxidation, FCP produces large facets along 111 oriented slip bands. This mode does not change with δK, and T1 decorated subgrain boundaries do not affect an expectedda/dN- δK transition for the inert environments. Rather, the complex dependence ofda/dN on δK is controlled by the environmental contribution to process zone microstructure-plastic strain interactions. A hydrogen embrittlement mechanism for FCP in 2090 is supported by similar brittle crack paths for low pressure water vapor and the electrolyte, the SGC and 100/110 crystallographic cracking modes, the influence of cyclic plastic zone volume (δK), and the benignancy of O2. The SGC may be due to hydrogen production and trapping at T1 bearing sub-boundaries after process zone dislocation transport, while crystallographic cracking may be due to lattice decohesion or hydride cracking.
41 citations
TL;DR: In this paper, an analytical electron microscopy was used to characterize the cracking process of 321 stainless steel in high temperature water and to better understand the δ-ferrite effect.
41 citations
Book•
01 Jan 2008
TL;DR: In this paper, the authors proposed a model for predicting stress corrosion cracking in pipeline steels under cyclic loading and showed that hydrogen embrittlement can be used to predict the presence of stress corrosion.
Abstract: Chemistry, mechanics and mechanisms. Modeling environmental attack. Crack growth mechanisms. Hydrogen-assisted cracking and embrittlement. Nonferrous alloys. Iron and nickel based alloys. Ceramics and glasses. Liquid metal embrittlement. History of SCC research. Environment-induced cracking of materials: prediction of stress corrosion cracking. Stress corrosion cracking in LWR environments. Corrosion and cracking of waste package materials. Crack growth in pipeline steels under cyclic loading. SCC and hydrogen embrittlement of pipeline steels. Degradation of materials under in-service conditions. Stress corrosion cracking case studies New test methods for SCC studies.
41 citations
TL;DR: Stress corrosion cracking behavior and mechanism of a friction stir welded Al-Zn-Mg-Zr alloy with 025% Sc were investigated in this article, where impurity intermetallics and primary Al3ScxZr1−x particles both crack perpendicular to tensile direction, whereas anodic dissolution only occurs around the former, initiating SCC during cracking propagation.
41 citations