Topic
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 effect of machining-induced surface residual stress on the stress corrosion cracking (SCC) initiation in 316 stainless steel was investigated in boiling magnesium chloride solution.
100 citations
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30 Apr 1997-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the effect of grain size upon the stress corrosion cracking of 7475 Al-alloy plates has been investigated and the correlation of SCC susceptibility and hydrogen embrittlement susceptibility has been evaluated.
Abstract: The effect of grain size upon the stress corrosion cracking of 7475 Al-alloy plates has been investigated. Grain refinement resulted in a more homogeneous slip mode and a smaller size of grain boundary precipitates (GBPs) to influence the stress corrosion cracking (SCC) resistance. The more homogeneous slip mode is always beneficial for improving the SCC resistance. However, if the GBPs size was smaller than a critical precipitate size for nucleating hydrogen bubbles, the improvement of SCC resistance due to grain refinement, resulting from a more homogeneous slip mode, could not be obtained. The correlation of SCC susceptibility and hydrogen embrittlement susceptibility has been evaluated. The SCC susceptibility of the 7475 aluminum alloys is mainly controlled by hydrogen induced cracking mechanism.
100 citations
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TL;DR: In this article, the fine scale microstructure of Al-5083 (H-131) sensitized at 448 K (175 °C) for 1, 10, 25, 50, 100, 240, 500, and 1000 hours has been investigated using transmission electron microscopy (TEM) to study the evolution of the β phase (Al3Mg2) at grain boundaries and on pre-existing intragranular particles.
Abstract: The fine scale microstructure of Al-5083 (H-131) sensitized at 448 K (175 °C) for 1, 10, 25, 50, 100, 240, 500, and 1000 hours has been investigated using transmission electron microscopy (TEM) to study the evolution of the β phase (Al3Mg2) at grain boundaries and on pre-existing intragranular particles. In fully sensitized Al-5083, the β phase (Al3Mg2) forms heterogeneously both at grain boundaries and on pre-existing particles, which are enriched in manganese. TEM observations showed that the grain boundary precipitation of the β phase initially occurs between 0 to 1 hour of aging at 448 K (175 °C), and that the β phase grows with a ribbonlike morphology. The grain boundary planes are covered by the β phase after 240 hours of aging. The contribution of microstructure, defects, and environment on the stress corrosion cracking (SCC) behavior is discussed.
100 citations
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TL;DR: The linearly increasing stress test (list) as discussed by the authors is a load-controlled version of the CERT test, with the essential difference that the list test is load controlled whereas the Cert test is displacement-controlled.
Abstract: This paper presents a new testing apparatus for stress corrosion research. In this linearly increasing stress test (LIST) method, plain un-notched specimens are simultaneously exposed to an environment and subjected to an applied stress increasing linearly at a controlled rate. Experiments are repeated at various applied stress rates and the parameters measured include SCC initiation stress (the stress at which stress corrosion cracks start to propagate), fracture stress and average crack velocity. The LIST test is similar to the constant extension rate test (CERT) test, with the essential difference that the LIST test is load-controlled whereas the CERT test is displacement-controlled. The LIST test is particularly aimed at service conditions of loaded parts and structures; that is, service conditions described as load-controlled. This paper describes the design, construction and operation of the test apparatus and some typical results are given to illustrate its performance. Experiments have been conducted using as-quenched 3.5Ni-Cr-Mo-V turbine rotor steel specimens in aerated distilled water at 90 degrees C at stress rates varying from 0.00034 MPa s-1 to 2.08 MPa s-1.
99 citations
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TL;DR: In this article, the influence of zinc on a ∑5(0.1/2) aluminum grain boundary was investigated by means of first principles calculations with the full potential linearized augmented plane wave method using two approaches: (i) within the framework of the Rice-Wang thermodynamic model; (ii) by the ab initio tensile test method.
98 citations