Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Grain Boundary Segregation And Stress Corrosion Cracking Of Aluminum Alloys
Download Grain Boundary Segregation And Stress Corrosion Cracking Of Aluminum Alloys full books in PDF, epub, and Kindle. Read online Grain Boundary Segregation And Stress Corrosion Cracking Of Aluminum Alloys ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Grain Boundary Segregation and Stress Corrosion Cracking of Aluminum Alloys by :
Download or read book Grain Boundary Segregation and Stress Corrosion Cracking of Aluminum Alloys written by and published by . This book was released on 1976 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Auger electron spectroscopy and chemical depth profiling by argon sputtering were employed to obtain the grain boundary segregation profiles of various aluminum alloys. Samples of both commercial (7075, 7050, and 7049) and high purity alloys based on the Al-Zn-Mg ternary in different heat treatments were examined following in situ fracturing in the spectrometer. Segregation profiles indicate that the grain boundaries in these alloys are considerably enriched in Mg and Zn. In commercial alloys, however, the grain boundaries are depleted in the minor elements Fe, Cu and Si. AES spectra of oxide films formed on Al-Zn-Mg alloys indicate that the enhanced segregation along the grain boundaries results in a film rich in Mg. It is postulated that incorporation of extensive amounts of these alloying elements into the film renders it less protective and leads to enhanced hydrogen entry and embrittlement by stress corrosion cracking.
Book Synopsis Grain Boundary Segregation in Al-Zn-Mg Alloys -- Implications to Stress Corrosion Cracking by : R. K. Viswanadham
Download or read book Grain Boundary Segregation in Al-Zn-Mg Alloys -- Implications to Stress Corrosion Cracking written by R. K. Viswanadham and published by . This book was released on 1978 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prior studies on grain boundary segregation in Al-Zn-Mg have shown that free Mg is present along the grain boundaries in these alloys under all heat-treat conditions. In this paper, further studies on grain boundary segregation in Al-Zn-Mg alloys are outlined. A physical basis for the observed segregation profiles is provided through the vacancy pump model developed by Anthony. The implications of the observed segregation to stress corrosion cracking (SCC) and other environmentally-induced embrittling phenomena (where hydrogen could possibly play a dominant role) are discussed in terms of a possible Mg-H complex formation. A wide body of circumstantial evidence from several areas for such an interaction is provided. The dependence of this segregation on boundary type is explored and texture control is proposed as a possible means of controlling segregation and enhancing resistance to stress corrosion cracking. (Author).
Book Synopsis Stress-corrosion Cracking of Aluminum Alloys by : J. D. Jackson
Download or read book Stress-corrosion Cracking of Aluminum Alloys written by J. D. Jackson and published by . This book was released on 1965 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Delayed Fracture of Aluminum Alloys by : R. K. Viswanadham
Download or read book The Delayed Fracture of Aluminum Alloys written by R. K. Viswanadham and published by . This book was released on 1978 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prior studies on the grain boundary segregation of Al-Zn-Mg alloys have shown that Mg and Zn are heavily segregated to the grain boundaries. AES studies coupled with plasmon-loss measurements have enabled us to identify the chemical state of the segregants present on the grain boundary. These studies show that in the asquenched condition, the Mg and Zn segregated along the grain boundaries are present in solid solution. In the peak-and over-aged conditions, all the Zn is incorporated into the MgZn2 particles while a major fraction of Mg is present as free Mg. In the as-quenched condition, the segregants are confined to about 50 to 100 angstrom from the grain boundary. Utilizing the vacancy solute drag model, it is possible to qualitatively account for the observed extent of solute segregation. The implications to stress corrosion cracking (SCC) of the free Mg observed on the grain boundaries under all heat treatment conditions can be analyzed by proposing Mg-H complex formation. Consequently this year's efforts were focused on studying the effect of the Mg/Zn ratio on the SCC Susceptibility of Al-Zn-Mg alloys.
Book Synopsis Stress Corrosion Cracking of Alpha Copper Alloys in Steam by : Patrick Arthur Tully
Download or read book Stress Corrosion Cracking of Alpha Copper Alloys in Steam written by Patrick Arthur Tully and published by . This book was released on 1955 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Stress Corrosion Cracking Model by : Richard C. Fabiniak
Download or read book A Stress Corrosion Cracking Model written by Richard C. Fabiniak and published by . This book was released on 1971 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The characteristic susceptibility to stress-corrosion cracking exhibited by certain titanium and many aluminum alloys was studied. Mechanisms germane to establishing the conditions for stress-corrosion cracking in heat-treatable alloys during precipitation hardening are covered. A 7075 A1 alloy and an A1-Zn-Mg ternary alloy were used in construction of a stress-corrosion model. The model showed that the stress corrosion cracking susceptibility of A1 alloys becomes reduced if one or more of the following can be realized: (1) elimination of the precipitation-free zone, PFZ, through proper heat treatment; (2) inducement of the formation of primary precipitates in the PFZ to enhance hardening; (3) inducement of the segregation of solute atoms to produce sufficient grain boundary hardening into the PFZ; (4) reduction of the PFZ width to a practical minimum; and (5) addition of an additive such as Cd, Sn and In to initiate precipitation of CuAl2 in the PFZ during initial aging. The resistance to stress-corrosion cracking will be increased because of: (1) the virtual elimination of the difference in mechanical properties between the PFZ and the train interior due to differences in thermal history, and (2) due to the presence of Cd, the reduction of the anodic effect at the grain boundaries. (Author).
Book Synopsis Grain Boundary Precipitation Contribution to Stress Corrosion Cracking in 2000 and 7000 Series Aluminum Alloys by : Jeffrey A. Hawk
Download or read book Grain Boundary Precipitation Contribution to Stress Corrosion Cracking in 2000 and 7000 Series Aluminum Alloys written by Jeffrey A. Hawk and published by . This book was released on 1983 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stress-corrosion Cracking of Aluminum Alloys by : Gunter Ogiermann
Download or read book Stress-corrosion Cracking of Aluminum Alloys written by Gunter Ogiermann and published by . This book was released on 1968 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report summarizes information from selected European papers and lectures that were published or presented between mid 1967 and July 1, 1968. Subjects discussed include: the nature of stress-corrosion, stress-corrosion in AlMg, AlMgZn, and AlMgSi alloys and testing for susceptibility to stress-corrosion cracking. (Author).
Book Synopsis A Fundamental Investigation of the Nature of Stress-corrosion Cracking in Aluminum Alloys by : F. H. Haynie
Download or read book A Fundamental Investigation of the Nature of Stress-corrosion Cracking in Aluminum Alloys written by F. H. Haynie and published by . This book was released on 1965 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mechanism of stress-corrosion cracking in 7079 aluminum alloy was investigated by analysis of microstructural changes that occur during exposure to 3.5 per cent NaCl solution. During the corrosion reaction dislocation networks were generated within the grains and along strain-contour bands. Grain-boundary voids occurred where several of these bands originated or terminated. This suggests that the intragranular structure develops as a result of hydrogen entering the alloy and that the voids are propagated under applied load to form grain-boundary cracks. This study is in the preliminary stages and is being continued. (Author).
Book Synopsis Stress Corrosion Cracking of Wrought and P/M High Strength Aluminum Alloys by : A. W. Thompson
Download or read book Stress Corrosion Cracking of Wrought and P/M High Strength Aluminum Alloys written by A. W. Thompson and published by . This book was released on 1986 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major findings from a comprehensive study on the role of microstructure on the susceptibility to environmental embrittlement of high strength aluminum alloys are presented and discussed. Most of the studies used commercial 7075, or a high purity equiaxed version, HP7075, or a similar powder version 7090. Through the innovative use of loading mode and straining electrode test, stress corrosion cracking was shown to be controlled by the introduction and internal distribution of hydrogen, particularly to grain boundaries. This was the case for the underaged and peak aged microstructures, with the latter being the most susceptible. The SCC behavior of the even more resistant overaged microstructure was shown to be controlled by anodic dissolution processes, predominantly associated with slip bands. Aluminum alloys were also shown to be susceptible to embrittlement under conditions of cathodic polarization correcting a widely held belief that concomitant anodic processes are required. Studies using controlled microstructures were able to rank the importance of different microstructural features to help develop alloy design strategies for more environmentally resistant alloys--the most effective features are those grain interior precipitates which promote fine, homogeneous slip either by reduced particle cutting or enhanced dislocation generation; fine, grain boundary precipitate free zones were found not to be very important, except in their role in reducing the local strength of the boundary region.
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 STUDY OF STRESS-CORROSION CRACKING OF ALUMINUM ALLOYS. by :
Download or read book STUDY OF STRESS-CORROSION CRACKING OF ALUMINUM ALLOYS. written by and published by . This book was released on 1967 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: A further clarification of the mechanism of stress-corrosion cracking in 7075 aluminum alloy was obtained, particularly with regard to the role of dislocations in the mechanism and to the relationship between dislocation mobility and susceptibility to stress-corrosion cracking; high dislocation mobility reduces susceptibility. It was demonstrated during stress-corrosion tests on 7075-T73 specimens that had undergone prior plastic deformation, that the introduction of dislocations alone did not lower the dislocation mobility sufficiently to diminish the stress-corrosion resistance. This is in contrast to similar experiments with -T6 specimens, wherein precipitation was induced by similar deformation and the mobility was reduced sufficiently to lower the stress-corrosion resistance. An important role for immobilized dislocations was also suggested by a theoretical calculation of the stress field around an edge dislocation which neighbors a grain boundary precipitate. This calculation, which was based only on elasticity theory and thus precluded plastic flow, indicated that a large tensile stress, theoretically as high as 250,000 psi, could act normal to the precipitate-matrix interface. When the capacity for plastic flow (i.e., the dislocation mobility) was intentionally reduced by notching a stress-corrosion specimen, a rapid failure could be induced in normally resistant 7075-T73 alloy.
Book Synopsis Stress Corrosion Cracking by : V S Raja
Download or read book Stress Corrosion Cracking written by V S Raja and published by Elsevier. This book was released on 2011-09-22 with total page 817 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of stress corrosion cracking (SCC), which causes sudden failure of metals and other materials subjected to stress in corrosive environment(s), has a significant impact on a number of sectors including the oil and gas industries and nuclear power production. Stress corrosion cracking reviews the fundamentals of the phenomenon as well as examining stress corrosion behaviour in specific materials and particular industries. The book is divided into four parts. Part one covers the mechanisms of SCC and hydrogen embrittlement, while the focus of part two is on methods of testing for SCC in metals. Chapters in part three each review the phenomenon with reference to a specific material, with a variety of metals, alloys and composites discussed, including steels, titanium alloys and polymer composites. In part four, the effect of SCC in various industries is examined, with chapters covering subjects such as aerospace engineering, nuclear reactors, utilities and pipelines. With its distinguished editors and international team of contributors, Stress corrosion cracking is an essential reference for engineers and designers working with metals, alloys and polymers, and will be an invaluable tool for any industries in which metallic components are exposed to tension, corrosive environments at ambient and high temperatures. Examines the mechanisms of stress corrosion cracking (SCC) presenting recognising testing methods and materials resistant to SCC Assesses the effect of SCC on particular metals featuring steel, stainless steel, nickel-based alloys, magnesium alloys, copper-based alloys and welds in steels Reviews the monitoring and management of SCC and the affect of SCC in different industries such as petrochemical and aerospace
Book Synopsis Stress Corrosion Cracking of Pipelines by : Y. Frank Cheng
Download or read book Stress Corrosion Cracking of Pipelines written by Y. Frank Cheng and published by John Wiley & Sons. This book was released on 2013-02-19 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explains why pipeline stress corrosion cracking happens and how it can be prevented Pipelines sit at the heart of the global economy. When they are in good working order, they deliver fuel to meet the ever-growing demand for energy around the world. When they fail due to stress corrosion cracking, they can wreak environmental havoc. This book skillfully explains the fundamental science and engineering of pipeline stress corrosion cracking based on the latest research findings and actual case histories. The author explains how and why pipelines fall prey to stress corrosion cracking and then offers tested and proven strategies for preventing, detecting, and monitoring it in order to prevent pipeline failure. Stress Corrosion Cracking of Pipelines begins with a brief introduction and then explores general principals of stress corrosion cracking, including two detailed case studies of pipeline failure. Next, the author covers: Near-neutral pH stress corrosion cracking of pipelines High pH stress corrosion cracking of pipelines Stress corrosion cracking of pipelines in acidic soil environments Stress corrosion cracking at pipeline welds Stress corrosion cracking of high-strength pipeline steels The final chapter is dedicated to effective management and mitigation of pipeline stress corrosion cracking. Throughout the book, the author develops a number of theoretical models and concepts based on advanced microscopic electrochemical measurements to help readers better understand the occurrence of stress corrosion cracking. By examining all aspects of pipeline stress corrosion cracking—the causes, mechanisms, and management strategies—this book enables engineers to construct better pipelines and then maintain and monitor them to ensure safe, reliable energy supplies for the world.
Book Synopsis Stress-corrosion Cracking of Aluminum Alloys by : F. H. Haynie
Download or read book Stress-corrosion Cracking of Aluminum Alloys written by F. H. Haynie and published by . This book was released on 1966 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report deals with the stress-corrosion cracking of aluminum alloys, and it represents an effort by DMIC to expand on the information contained in DMIC Memorandum 202, 'Stress-Corrosion Cracking of Aluminum Alloys', dated February 15, 1965. DMIC Report 228 begins by presenting a comprehensive definition of stress-corrosion cracking. This is followed by sections dealing with (1) the historical development and growth in awareness of the problem, (2) the mechanisms involved, and (3) the theory of stress-corrosion cracking. A section on experimental techniques is presented. These techniques include test methods used to determine the susceptibility of alloys to stress-corrosion cracking, as well as more refined methods of studying the fundamental mechanisms of the problem. Different evaluation methods, applicable to obtaining the different objectives of stress-corrosion testing, are also presented. All of the foregoing serve as background to the sections on stress-corrosion-cracking behavior of aluminum alloys and preventive measures. (Author).
Book Synopsis Stress-corrosion Cracking of Aluminum Alloys by : F. R. Mertens
Download or read book Stress-corrosion Cracking of Aluminum Alloys written by F. R. Mertens and published by . This book was released on 1967 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aluminum written by John E. Hatch and published by ASM International. This book was released on 1984-01-01 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive information for the American aluminium industry Collective effort of 53 recognized experts on aluminium and aluminium alloys Joint venture by world renowned authorities-the Aluminium Association Inc. and American Society for Metals. The completely updated source of information on aluminium industry as a whole rather than its individual contributors. this book is an opportunity to gain from The knowledge of the experts working for prestigious companies such as Alcoa, Reynolds Metals Co., Alcan International Ltd., Kaiser Aluminium & Chemical Corp., Martin Marietta Laboratories and Anaconda Aluminium Co. It took four years of diligent work to complete this comprehensive successor to the classic volume, Aluminium, published by ASM in 1967. Contents: Properties of Pure Aluminum Constitution of Alloys Microstructure of Alloys Work Hardening Recovery, Recrystalization and Growth Metallurgy of Heat Treatment and General Principles of Precipitation Hardening Effects of Alloying Elements and Impurities on Properties Corrosion Behaviour Properties of Commercial Casting Alloys Properties of Commercial Wrought Alloys Aluminum Powder and Powder Metallurgy Products.
