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Author : K. N. Tong
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (227 download)
Download or read book An Investigation of Hydrogen Embrittlement of 4340 Steel Under Stress written by K. N. Tong and published by . This book was released on 1957 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alexander Robert Troiano
Publisher : ASM International
ISBN 13 : 9781615031788
Total Pages : 356 pages
Book Rating : 4.0/5 (317 download)
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:
Author : A. R. Elsea
Publisher :
ISBN 13 :
Total Pages : 166 pages
Book Rating : 4.3/5 (91 download)
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:
Author : C. S. KORTOVICH
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (227 download)
Download or read book Inhibition of Hydrogen Embrittlement in High Strength Steel written by C. S. KORTOVICH and published by . This book was released on 1975 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report involved a study of the effect of rare earth additions on the hydrogen embrittlement resistance of 4340 steel. Attempts were made in this study to improve the hydrogen embrittlement and stress corrosion resistance of hydrogenated 4340.
Author : J. Krieg
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)
Download or read book Investigation of Hydrogen Embrittlement of Hard High Chromium Alloy Plated 4340 Steel written by J. Krieg and published by . This book was released on 1963 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Louis Raymond
Publisher : ASTM International
ISBN 13 : 0803109598
Total Pages : 429 pages
Book Rating : 4.8/5 (31 download)
Download or read book Hydrogen Embrittlement written by Louis Raymond and published by ASTM International. This book was released on 1988 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. I. Phalen
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (227 download)
Download or read book Structural Changes in High-strength Steel Associated with Stress Corrosion and Its Relationship to Delayed Failure written by D. I. Phalen and published by . This book was released on 1965 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microscopic and crystal-structure examinations have been made on AISI 4340 steel heat treated to four strength levels, to provide a basis for investigating changes in these materials during stress-corrosion cracking and hydrogen embrittlement. Preliminary studies on stress-corrosion fracture surface reveal two, and possibly three, morphological characteristics that coincide with specific areas in the fracture. Metal-hydrogen reactions that have been studied suggest different behavior for martensite and ferrite. The net result of the metal-hydrogen reaction was found to be an induced compressive stress in the surface. (Author).
Author : A. R. Elsea
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.3/5 (91 download)
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).
Author : Louis Raymond
Publisher :
ISBN 13 :
Total Pages : 58 pages
Book Rating : 4.:/5 (227 download)
Download or read book Study of Effects of Alloying and Heat Treatment on Hydrogen Enbrittlement Susceptibility of Electroslag Remelted 4340 Steel written by Louis Raymond and published by . This book was released on 1986 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: This program focuses on the need to improve the resistance of high-strength steels to hydrogen embrittlement of hydrogen stress cracking. Variations in heat treatment and modifications in alloy composition of electroslag remelted 4340 steel at 53 HRC were extensively explored. Target goals were established in terms of a threshold stress intensity parameter, KIscc for open circuit potential conditions, designated KIhem for cathodic charging conditions under stress during test, which were the primary test conditions in this program. In general, all alloy additions improved KIhem. The addition of 0.1% vanadium appears to be the most significant individual modification to ESR 4340 steel in that it alone provides the same gains as the more heavily alloyed ESR 4340 steels. The results must be somewhat qualified because the hardness of ESR 4340V was 50 HRC instead of the intended 53 HRC. Silicon additions of about 1.5% tended to maximize the benefits from alloy modifications. Although within an alloy system the heat treatment effects were monor or secondary relative to alloy additions, the use of an intermediate quench and subzero cooling appeared to maximize the benefits from heat treatment.
Author : Richard Alan Hays
Publisher :
ISBN 13 :
Total Pages : 178 pages
Book Rating : 4.:/5 (197 download)
Download or read book Surface Residual Stress Effects on Stress Corrosion Cracking/hydrogen Embrittlement Behavior of AISI 4340 Steel written by Richard Alan Hays and published by . This book was released on 1988 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ellis E. Fletcher
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.3/5 (91 download)
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).
Author : A. A. Sheinker
Publisher :
ISBN 13 :
Total Pages : 45 pages
Book Rating : 4.:/5 (227 download)
Download or read book Effect of Rare Earth Additions on Hydrogen Embrittlement Cracking in 4340 Steel written by A. A. Sheinker and published by . This book was released on 1978 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of a 0.2 weight percent cerium addition on the hydrogen embrittlement cracking resistance of AISI 4340 steel was investigated at yield strength levels of approximately 210 and 185 ksi (1450 and 1280 MPa). Sustained-load delayed failure data for precracked compact tension specimens electrolytically charged with hydrogen and plated with cadmium exhibited considerable scatter which was attributed to (1) a loss of hydrogen from the specimens during the storage period between cadmium plating and testing and (2) a nonuniform distribution of cerium in the rare earth modified steel.
Author : In-Ok Shim
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.:/5 (184 download)
Download or read book Hydrogen Embrittlement Study and Positron Annihilation Response of Hydrogen in AISI 4340 Steel written by In-Ok Shim and published by . This book was released on 1988 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Colin Grey
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (125 download)
Download or read book Assessment of the Degree of Hydrogen Embrittlement Produced in Plated High-Strength 4340 Steel by Paint Strippers Using Slow Strain Rate Testing written by Colin Grey and published by . This book was released on 1988 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present work demonstrates how a slow strain rate test can be used to quantify rapidly the severity of hydrogen embrittlement produced in porous cadmium plated-and-baked high-strength 4340 steel by paint strippers. The results of multiple slow strain rate tests, conducted at a crosshead displacement rate of 2 x 10-4 mm/s using notched tension specimens in various paint strippers, show that a minimum mean fracture stress within the range of 1700 to 1850 MN/m2 can be correlated with the pass/fail criterion for acceptability of paint strippers in standard notched C-ring tests. The advantages of using a slow strain rate test as a viable alternative to existing standard methods for hydrogen embrittlement testing are discussed.
Author : Tuhin Das
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (964 download)
Download or read book Hydrogen Embrittlement (HE) Susceptibility of High Strength Tempered Martensite Steels written by Tuhin Das and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Hydrogen embrittlement (HE) is identified as a serious problem even after decades of extensive research, in various industries starting from aerospace to fastener. HE is primarily responsible for the degradation of mechanical performances of a number of metals and alloys that are used nowadays. Among them, high strength steels owing to their widespread applications also suffer from HE failures to a great deal. Hence, this thesis focuses on fundamental issues influencing the susceptibility of three different grades of high strength steels designed for fastener applications.The present work includes investigation of mechanical properties both in presence and absence of hydrogen, microstructural characterisations and direct hydrogen quantification. The mechanical property test methodology is a modification of the ASTM F1624 standard test method to determine hydrogen embrittlement threshold in steels, which facilitates a unique approach to investigate the HE susceptibility of these steel grades. The microstructural characterisation process involves scanning electron microscopy (SEM), electron backscattered diffraction (EBSD) and transmission electron microscopy (TEM) to identify the potential hydrogen trap states in microstructure, both qualitatively and quantitatively. Microstructural characterisation also provides useful information to predict local microstructural evolution in the presence of hydrogen and stress. Altogether, a structure-property relationship has been developed for these materials employing a comprehensive investigation process. In addition to it, fracture surface mapping using SEM indicates the mechanisms of failure associated with HE process in these materials. And finally, direct hydrogen quantification methodology using thermal desorption spectroscopy (TDS) provides further experimental evidence to the above-mentioned facts. Thus, in this work a combined approach involving various research techniques and knowledge has been utilised to investigate the susceptibility of the steel grades and rank them according to their performances under the influence of hydrogen." --
Author : William J. Pollock
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (125 download)
Download or read book Assessment of the Degree of Hydrogen Embrittlement Produced in High-Strength 4340 Steel by Plating-and-Baking Processes Using Slow Strain Rate Testing written by William J. Pollock and published by . This book was released on 1988 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The degree of hydrogen embrittlement produced in high-strength 4340 steel by various cadmium, cadmium-titanium, and nickel plating-and-baking procedures is assessed from fracture stress values obtained during slow strain rate tests using notched tension specimens. At low crosshead displacement rates, the slow strain rate method is capable of quantifying the degree of embrittlement produced by a variety of low-embrittlement, plating-and-baking procedures and is more sensitive than conventional test methods defined in standard specifications. The advantages of using a slow strain rate method as a viable alternative to existing standard methods for assessment of the degree of hydrogen embrittlement in plated-and-baked, high-strength steel are discussed.
Author : Bhagwan K. Das
Publisher :
ISBN 13 :
Total Pages : 95 pages
Book Rating : 4.:/5 (227 download)
Download or read book Exploratory Development on the Hydrogen Embrittlement of High Strength Steel During Machining written by Bhagwan K. Das and published by . This book was released on 1973 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: The experimental program was undertaken to investigate the possibility of machining fluids being a source of hydrogen for a given high strength aerospace structural alloy. Unexpected catastrophic failure of high strength steel structures can occur as a result of hydrogen embrittlement if the material absorbs high levels of hydrogen during fabrication or when the hardware is in use. Test specimens made of AISI 4340 high strength steel of known hydrogen concentration were subjected to a specified schedule of gentle and abusive milling and grinding operations using different machining fluids. Following the machining operations the specimens were analyzed for excess hydrogen above the base level with a Boeing developed 'Ultrasensitive Hydrogen Analysis System'. A total of six different machining fluids with different active chemical components were used in this study. Experimental results are presented with a statistical analysis of the hydrogen concentration data.
