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The Role Of Hydrogen In The Stress Corrosion Failure Of High Strength Al Zn Mg Alloys And Sensitized Austenitic Stainless Steels
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Book Synopsis The Role of Hydrogen in the Stress Corrosion Failure of High Strength Al-Zn-Mg Alloys and Sensitized Austenitic Stainless Steels by : L. Christodoulou
Download or read book The Role of Hydrogen in the Stress Corrosion Failure of High Strength Al-Zn-Mg Alloys and Sensitized Austenitic Stainless Steels written by L. Christodoulou and published by . This book was released on 1980 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation into the effect of exposure of Al-Zn-Mg alloys to water vapour has shown that hydrogen, produced by the reaction is absorbed by both the alloy grain boundaries and matrix. The amount of absorbed hydrogen depends on the local chemistry and the metal/Oxide interface and is influenced by alloying additions. Attainment of a critical concentration of dissolved hydrogen in the boundaries leads to brittle intergranular fracture on the subsequent application of stress. Attainment of a critical hydrogen concentration in the matrix leads to transgranular cleavage fracture. Depending upon the alloy composition and heat treatment bubbles of gaseous hydrogen can be formed at suitable sites within the alloys such as grain boundary particles. The formation of grain boundary bubbles reduces embrittlement by reducing the local concentration of dissolved hydrogen. It is proposed that the interaction of stress and environmental variables with the above criteria governs the environmental failure of Al-Zn-Mg alloys in aqueous and water vapour containing environments. It is suggested that such failures are hydrogen embrittlement dominated.
Book Synopsis The Role of Hydrogen in the Stress Corrosion Failure of High Strength A1-Zn-Mg Alloys and Sensitised Austenitic Stainless Steels by : L. Christodoulou
Download or read book The Role of Hydrogen in the Stress Corrosion Failure of High Strength A1-Zn-Mg Alloys and Sensitised Austenitic Stainless Steels written by L. Christodoulou and published by . This book was released on 1978 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report is divided into two parts covering each of the materials studied. Part 1. It has been found that exposure of an Al-Zn-Mg alloy to water vapour saturagated air results in loss of ductility and subsequent formation of hydrogen bubbles at high energy sites such as grain boundaries. The rate of embrittlement depends upon the prior heat treatment of the alloy: thus for a given hydrogen level one microstructure may be brittle while another may still exhibit some ductility. Fractographic studies have indicated that the distribution of hydrogen within the alloy determines the mode of fracture. Part 2. Experimental techniques have been developed to study the stress corrosion of stainless steel. Preliminary characterisation of the material (302 grade stainless steel) is in progress. In both parts of the report proposed future studies are described.
Download or read book Research in Progress written by and published by . This book was released on 1976 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Role of Hydrogen in the Stress Corrosion Failure of High Strength Al-Zn-Mg Alloys by : M. L. Yuen
Download or read book The Role of Hydrogen in the Stress Corrosion Failure of High Strength Al-Zn-Mg Alloys written by M. L. Yuen and published by . This book was released on 1982 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three alloys, Al 6% Zn 3% Mg. Al 6% Zn 3% Mg 1.7% Cu and Al 6% Zn 3% Mg 0.14% Cr. were pre-exposed in the solution treated condition to water vapour at 115C. Dry control tests were also performed. Both sets of samples were tested in tension using a slow strain rate of 1/1,000,000S and the results were compared with previously obtained data using a strain rate of 1/1000S. All the samples exposed to steam showed evidence of hydrogen embrittlement, the effects being more severe at the slow strain rate. Evidence was also obtained for hydrogen embrittlement via reaction of the metal with the laboratory air during slow strain rate testing in all cases except for the copper containing alloy. Both intergranular and transgranular brittle fracture can be produced as a result of hydrogen absorption into the metal: tolerance to hydrogen is related to the ability of the microstructure to trap hydrogen in the form of gas bubbles.
Book Synopsis Research in Progress Between ... and by : United States. Army Research Office
Download or read book Research in Progress Between ... and written by United States. Army Research Office and published by . This book was released on 1978 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1980 with total page 1280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental and Metallurgical Factors of Stress-corrosion Cracking in High-strength Steels by : C. J. Slunder
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:
Book Synopsis Hydrogen Embrittlement and Stress Corrosion Cracking by : Alexander Robert 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:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1980-10 with total page 1512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1990 with total page 1342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stress-corrosion Cracking in High Strength Steels and in Titanium and Aluminum Alloys by : Benjamin Floyd Brown
Download or read book Stress-corrosion Cracking in High Strength Steels and in Titanium and Aluminum Alloys written by Benjamin Floyd Brown and published by . This book was released on 1972 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Problem of Hydrogen in Steel by : A. R. Elsea
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).
Book Synopsis High Performance Stainless Steels by : Curtis W. Kovach
Download or read book High Performance Stainless Steels written by Curtis W. Kovach and published by . This book was released on 2000 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts Index written by and published by . This book was released on 1996 with total page 1622 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of High Pressure, High Temperature Hydrogen on Steel by : Ellis E. Fletcher
Download or read book The Effects of High Pressure, High Temperature Hydrogen on Steel written by Ellis E. Fletcher and published by . This book was released on 1964 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report deals with the deleterious effects of hydrogen gas on steel at elevated temperatures and/or pressures. Hydrogen attack on steels is manifest as decarburization, intergranular fissuring, or blistering. These conditions result in lowered tensile strength, ductility, and impact strength. The reaction of hydrogen with iron carbide to form methane is probably the most important chemical reaction involved in the attack on steel by hydrogen. Attack of steel at elevated temperatures and pressures is limited or prevented by the following measures: (1) use of steel alloyed with strong carbide-forming elements, (2) use of liners of resistant alloy steels, and (3) substitution of resistant nonferrous alloys.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1980 with total page 1112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
