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 article, electron-back scattering diffraction and hardness measurements were used to measure the microstructure and local deformation in 316NG weld heat-affected zones, where intergranular cracking along random boundaries was observed near the weld fusion line.
71 citations
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TL;DR: Slow strain rate tests (SSRTs) on differently shaped tensile specimens machined from two heats of Alloy 600 tubing were conducted at 350 C in deaerated aqueous solutions containing small a....
Abstract: Slow strain rate tests (SSRTs) on differently shaped tensile specimens machined from two heats of Alloy 600 tubing were conducted at 350 C in deaerated aqueous solutions containing small a...
71 citations
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TL;DR: In this article, the deformation microstructure of proton-irradiated stainless steels was investigated using scanning electron microscopy and transmission-empowered microscopy, and the results showed that the slip lines interacted with grain boundaries by grain-to-grain transmission, grain boundary sliding or deformation ledge formation at grain boundaries.
70 citations
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TL;DR: In this article, the effects of silicon additions and retained austenite on the stress-corrosion cracking (SCC) behavior of commercial ultra-high strength steels (AISI 4340 and 300-M) tested in aqueous solutions were made.
Abstract: A study has been made of the effects of silicon additions and of retained austenite on the stress-corrosion cracking (SCC) behavior of commercial ultrahigh strength steels (AISI 4340 and 300-M) tested in aqueous solutions. By comparing quenched and tempered structures of 4340 and 300-M i) at equivalent strength and ii) at their respective optimum and commercially-used heat-treated conditions, the beneficial role of silicon addition on SCC re-sistance is seen in decreased Region II growth rates, with no change in K’ISCC. The beneficial role of retained austenite is demonstrated by comparing isothermally transformed 300-M, containing 12 pct austenite, with conventionally quenched and tempered structures of 300-M and 4340, containing less than 2 pct austenite, at identical yield strength levels. Here, the isothermally transformed structure shows an order of magnitude lower Region II SCC growth rates than quenched and tempered 300-M and nearly two orders of magnitude lower Region II growth rates than 4340, K ISCC values remaining largely unchanged. The results are discussed in terms of hydrogen embrittlement mechanisms for SCC in martensitic high strength steels in the light of the individual roles of hydrogen diffusivity and carbide type.
70 citations
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25 Jan 2005-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the mechanical and corrosion behavior of rheocast and low-pressure cast A356-T6 alloy were examined and compared with each other, and the tensile, impact and high-cycle fatigue tests were conducted to characterizing the mechanical behavior.
Abstract: In this study, the mechanical and corrosion behavior of rheocast and low-pressure cast A356-T6 alloy were examined and compared with each other. Tensile, impact and high-cycle fatigue tests were conducted to characterizing the mechanical behavior. For the study of general corrosion and stress corrosion cracking behavior of A356-T6 alloy, polarization, potentiostatic and in situ slow strain rate tests were performed on both products of A356-T6 alloy in a 3.5% NaCl solution. It was found that the mechanical and corrosion behaviors, as well as the microstructural features, of A356-T6 alloy were substantially affected by different processing routes. The tensile elongation and the impact energy values of A356-T6 were, e.g., greatly improved with rheocasting process. The resistance to general corrosion and stress corrosion cracking was also improved with rheocasting process. This study strongly suggests that the microstructural features, including the volume fraction and the shape of eutectic Si particles, are largely responsible for the variation in the mechanical and corrosion properties of A356-T6 alloy with different processing routes.
70 citations