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: The influence of changes in chemical composition and pre-aging deformation on the resistance to stress corrosion cracking in the age-hardenable aluminum alloy 2519 was investigated by transmission electron microscopy.
38 citations
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TL;DR: The improved corrosion resistance of the samples subjected to 1 pass of ECAP compared to the samples in the as received condition and to the sample subjected to 2 and 4 passes represents the reason of their reduced SCC susceptibility.
Abstract: Despite the great potential of Mg and its alloys as material for biodegradable implants, their low resistance to the simultaneous action of corrosion and mechanical stresses in the human body have hampered their use. Stress Corrosion Cracking has been reported as one of the most critical failure modes to overcome to allow such materials to be clinically applied. Thus, in this paper we investigate the effect of Equal Channel Angular Pressing (ECAP) on the Stress Corrosion Cracking (SCC) susceptibility of the AZ31 Mg alloy. To do so, AZ31 alloy has been subjected to 1, 2 and 4 passes of ECAP, and the samples so obtained have then been tested by means Slow Strain Rate Tests (SSRTs) in Simulated Body Fluid (SBF) at 37 °C. Samples subjected to one pass of ECAP are shown to be less susceptible to SCC compared to the material in the as-received condition, while further ECAP processing (2 and 4 passes) are found to worsen the SCC susceptibility. To understand the different SCC susceptibilities shown by the differently ECAPed samples, microstructural analyses, potentiodynamic polarization curves, hydrogen evolution experiments and Scanning Electron Microscopy (SEM) analyses of the fracture surfaces were carried out. The improved corrosion resistance of the samples subjected to 1 pass of ECAP compared to the samples in the as received condition (due to a finer grain size) and to the samples subjected to 2 and 4 passes (due to a more favourable texture evolution) represents the reason of their reduced SCC susceptibility.
38 citations
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TL;DR: In this paper, it was shown that unstable crack extension would not occur in stainless steel piping systems designed in accordance with the American Society of Mechanical Engineers' (ASME) code even if severe circumferential flaws were present, provided that the values of L/R are less than about 200.
Abstract: The high ductility and toughness of the stainless steel reactor piping system have made it virtually certain not to experience unstable crack extension. The present study attempts to provide theoretical assurance that thepiping system will not suffer unstable crack extension even if severe circumferential cracking should occur. The analysis is based on the tearing instability concept and the tearing modulus criterion. Simplifications are conservatively made to facilitate the complicated analysis. The results are presented parametrically in graphical forms for convenience of general use. An application to a specific example is also discussed. The results indicate that the ratio, L/R, is of major importance in consideration of crack stability, where L is the length of the pipe between supports and R is the radius of the pipe. It is shown that unstable crack extension would not occur in stainless steel piping systems designed in accordance with the American Society of Mechanical Engineers' (ASME) code even if severe circumferential flaws were present, provided that the values of L/R are less than about 200. Since the values of L/R for boiling water reactor (BWR) stainless steel piping systems are generally much smaller, large margins against unstable fracture are assured for these systems. When L/R exceeds 200, a more detailed analysis would be necessary to demonstrate crack stability.
38 citations
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TL;DR: In this paper, the authors investigated the stress corrosion cracking and the electrochemical behavior of an API X70 pipeline steel in a simulated acidic soil solution using slow strain rate testing (SSRT), electr...
Abstract: The stress corrosion cracking (SCC) and the electrochemical behavior of an API X70 pipeline steel in a simulated acidic soil solution were investigated using slow strain rate testing (SSRT), electr...
37 citations
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TL;DR: Sensitization and intergranular stress corrosion cracking (IGSCC) behavior of deformed AISI 304 prior to aging at temperature 500 °C were investigated in this article.
37 citations