Download or read book A Mechanism for Hydrogen induced Brittle Fracture of Austenitic Stainless Steels written by G. R. Caskey and published by . This book was released on 1978 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanism for Hydrogen induced Brittle Fracture of Austenitic Stainless Steels written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Internal hydrogen embrittlement of several austenitic stainless steels is known to be accompanied by a change in fracture mode. Type 304L stainless steel is representative of these alloys. In other austenitic stainless steels, Type 310 for example, no change in fracture mode has been reported and gas phase charging of the alloy causes little change in strength or ductility. Cathodic charging, however, introduces extremely large amounts of hydrogen and ductility losses are observed. The embrittlement mechanism proposed in this paper for Type 304L stainless steel and similar alloys is based on results of a continuing program to investigate hydrogen embrittlement of austenitic stainless steels. The proposed mechanism, therefore, is tentative insofar as future results may contradict current beliefs or permit a more definitive mechanism to be developed. One central notion of this proposal is that of microcrack formation. The present fracture model envisions the nucleation step as taking place via a Zener--Stroh--Petch mechanism rather han a Cottrell coalescence model as proposed by Blanchard and Troiano.
Download or read book Hydrogen Embrittlement and Stress Corrosion Cracking written by Alexander Robert Troiano and published by ASM International. This book was released on 1984-01-01 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrogen Induced Brittle Fracture of Type 304L Austenitic Stainless Steel written by GR. Caskey and published by . This book was released on 1981 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Type 304L stainless steel supersaturated with hydrogen gas fails in tension at 200 to 250 K by brittle fracture. Fracture surfaces exhibit isolated facets oriented 0 to 30 deg to the tensile axis. These facets have many of the characteristics of cleavage fracture. The threefold symmetry of Laue back-reflection photographs and trace analysis of deformation bands on the facets demonstrate that fracture is along {111} planes. The fracture paths were identified as coherent twin boundaries on polished sections through facets and on microcracks across interior grains. Although twin-boundary parting is not commonly observed in alloys with a face-centered cubic (FCC) lattice, these observations for Type 304L stainless steel and similar observations of Nitronic-40 and Tenelon demonstrate that parting is possible in austenitic steels under some circumstances.
Download or read book Hydrogen induced Delayed Brittle Failures of High strength Steels written by A. R. Elsea and published by . This book was released on 1964 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress corrosion Cracking and Hydrogen stress Cracking of High strength Steel written by Ellis E. Fletcher and published by . This book was released on 1966 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-strength steels are susceptible to delayed cracking under suitable conditions. Frequently such a brittle failure occurs at a stress that is only a fraction of the nominal yield strength. Considerable controversy exists over whether such failures result from two separate and distinct phenomena or whether there is but one mechanism called by two different names. Stress-corrosion cracking is the process in which a crack propagates, at least partially, by the stress induced corrosion of a susceptible metal at the advancing tip of the stress-corrosion crack. There is considerable evidence that this cracking results from the electrtrochemical corrosion of a metal subjected to tensile stresses, either residual or externally applied. Hydrogen-stress cracking is cracking which occurs as the result of hydrogen in the metal lattice in combination with tensile stresses. Hydrogen-stress cracking cannot occur if hydrogen is prevented from entering the steel, or if hydrogen that has entered during processing or service is removed before permanent damage has occurred. It is generally agreed that corrosion plays no part in the actual fracture mechanism. This report was prepared to point out wherein the two fracture mechanisms under consideration are similar and wherein they differ. From the evidence available today, the present authors have concluded that there are two distinct mechansims of delayed failure. (Author).
Download or read book The Problem of Hydrogen in Steel written by A. R. Elsea and published by . This book was released on 1963 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: This memorandum introduces the problem of delayed, brittle failures associated with hydrogen in steel, particularly high-strength steel. It is intended to help the steel user determine if he has such a problem. The effects of hydrogen on the mechanical properties of steel are dealt with, and the behavior of material susceptible to delayed, brittle failure is described. Also, the effects of such factors as strength level, magnitude of applied stress, hydrogen content, steel composition, test temperature, and strain rate on hydrogen embrittlement and the susceptibility to hydrogen-induced, delayed, brittle failure are discussed. Possible sources of hydrogen in steel and the types of tests useful in determining the susceptibility to delayed failure are outlined. (Author).
Download or read book Hydrogen induced Cleavage Fracture of Type 304L Austenitic Stainless Steel written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Type 304L stainless steel supersaturated with hydrogen gas fails in tension at 200 to 250°K by brittle fracture. Fracture surfaces exhibit isolated facets oriented 0 to 30° to the tensile axis and have characteristics of cleavage fracture. The threefold symmetry of Laue back reflection photographs and trace analysis of deformation bands on the facets demonstrate that cleavage is along (111) planes. The fracture paths were identified as coherent twin boundaries on polished sections through facets and on microcracks across interior grains. Although cleavage fracture is not commonly observed in alloys with a face-centered cubic (FCC) lattice, these observations for Type 304L stainless steel and similar observations on Nitronic-40 and Tenelon demonstrate that cleavage is possible under some circumstances in austenitic steels.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1984 with total page 1430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Download or read book Cracking Phenomena in Welds IV written by Thomas Böllinghaus and published by Springer. This book was released on 2016-02-10 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the fourth volume in the well-established series of compendiums devoted to the subject of weld hot cracking. It contains the papers presented at the 4th International Cracking Workshop held in Berlin in April 2014. In the context of this workshop, the term “cracking” refers to hot cracking in the classical and previous sense, but also to cold cracking, stress-corrosion cracking and elevated temp. solid-state cracking. A variety of different cracking subjects are discussed, including test standards, crack prediction, weldability determination, crack mitigation, stress states, numerical modelling, and cracking mechanisms. Likewise, many different alloys were investigated such as aluminum alloys, copper-aluminum dissimilar metal, austenitic stainless steel, nickel base alloys, duplex stainless steel, creep resistant steel, and high strength steel.
Download or read book Environmental and Metallurgical Factors of Stress corrosion Cracking in High strength Steels written by C. J. Slunder and published by . This book was released on 1961 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Steels written by Robert William Kerr Honeycombe and published by John Wiley & Sons. This book was released on 1996-02-12 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: The properties of steels depend critically on their microstructure. By examining the mechanical properties of steels in conjunction with microstructure, the first edition gave a clear description of the development and behavior of these materials - the very foundation of their widespread use. This new edition more explicitly links this theory with applications while retaining the style and purpose of its predecessor.
Download or read book Manufacturing and Application of Stainless Steels written by Andrea Di Schino and published by MDPI. This book was released on 2020-04-15 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stainless steels represent a quite interesting material family, both from a scientific and commercial point of view, following to their excellent combination in terms of strength and ductility together with corrosion resistance. Thanks to such properties, stainless steels have been indispensable for the technological progress during the last century and their annual consumption increased faster than other materials. They find application in all these fields requiring good corrosion resistance together with ability to be worked into complex geometries. Despite to their diffusion as a consolidated materials, many research fields are active regarding the possibility to increase stainless steels mechanical properties and corrosion resistance by grain refinement or by alloying by interstitial elements. At the same time innovations are coming from the manufacturing process of such a family of materials, also including the possibility to manufacture them starting from metals powder for 3D printing. The Special Issue scope embraces interdisciplinary work covering physical metallurgy and processes, reporting about experimental and theoretical progress concerning microstructural evolution during processing, microstructure-properties relations, applications including automotive, energy and structural.
Download or read book Advanced High Strength Steels written by Mahmoud Y. Demeri and published by ASM International. This book was released on 2013-08-01 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines the types, microstructures and attributes of AHSSAlso reviews the current and future applications, the benefits, trends and environmental and sustainability issues.
Download or read book Hydrogen Induced Delayed Failure of Type 310 Stainless Steel Foils written by J. Kolts and published by . This book was released on 1976 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogen has been generally dismissed as playing a significant role in the mechanism of stress corrosion cracking of stable austenitic stainless steels because of the absence of brittle, delayed failures under cathodic charging conditions. In this investigation, 5-μm-thick foils of T310 (25Cr-20Ni) stainless steel have been embrittled with the application of cathodic potentials. Static delayed failures were observed in 1 N sulfuric acid (H2SO4) at ambient temperatures. Increased cathodic polarization resulted in decreased times to failure. The presence of 5-ppm arsenic greatly reduced the time to failure at a given applied potential. At a given current density, the time to failure for foils was considerably longer in solutions with pH 6 than in 1 N H2SO4.
Download or read book Failure Analysis of Heat Treated Steel Components written by Lauralice de Campos Franceschini Canale and published by ASM International. This book was released on 2008 with total page 651 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Corrosion of Austenitic Stainless Steels written by H S Khatak and published by Elsevier. This book was released on 2002-10-14 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive study covers all types of corrosion of austenitic stainless steel. It also covers methods for detecting corrosion and investigating corrosion-related failure, together with guidelines for improving corrosion protection of steels. - Details all types of corrosion of austenitic stainless steel - Covers methods for detecting corrosion and investigating corrosion-related failure - Outlines guidelines for improving corrosion protection of steels
