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Influence Of Microstructure On The Mechanical Properties And Stress Corrosion Susceptibility Of 7075 Aluminum Alloy
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Book Synopsis Influence of Microstructure on the Mechanical Properties and Stress Corrosion Susceptibility of 7075 Aluminum Alloy by : Philip Adler
Download or read book Influence of Microstructure on the Mechanical Properties and Stress Corrosion Susceptibility of 7075 Aluminum Alloy written by Philip Adler and published by . This book was released on 1971 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Matrix and grain boundary features were systematically varied, using appropriate heat treatment, to evaluate their significance in changing the mechanical and stress corrosion properties of 7075 aluminum alloy. Maximum strength is associated with a Guinier-Preston zone matrix. The precipitate-free-zone adjacent to high angle grain boundaries was found to have only a slight effect on yield and tensile strength and a greater influence on hardness. Stress corrosion susceptibility was studied in a chloride ion environment over a 0.7 - 3.5 pH range. Differences in pH-dependent susceptibility associated exclusively with grain boundary structure for material of highest strength were observed. Grain boundary precipitate spacing (inversely related to precipitate density) was found to be of primary importance to susceptibility. The relative importance of crack initiation to the over-all stress corrosion process was also found to be dependent on grain boundary microstructure. These results indicate that improved properties for Al-Mg-Zn type alloys can be attained by a desirable combination of matrix and grain boundary structure. (Author).
Book Synopsis Influence of Microstructure on the Mechanical Properties and Stess Corrosion Susceptibility of 7075 Aluminum Alloy by : P. Adler
Download or read book Influence of Microstructure on the Mechanical Properties and Stess Corrosion Susceptibility of 7075 Aluminum Alloy written by P. Adler and published by . This book was released on 1971 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Microstructure and Environment on Stress Corrosion of 7075 Aluminum Alloy by : G. Geschwind
Download or read book Effect of Microstructure and Environment on Stress Corrosion of 7075 Aluminum Alloy written by G. Geschwind and published by . This book was released on 1973 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grain boundary microstructure as well as the pH in a chloride ion solution environment was found to be significant to stress corrosion attack in 7075 aluminum alloys. The influence of these factors on both the initiation and propagation of cracking and the mode of attack in these alloys are described. Microstructural modifications to attain desirable stress corrosion resistance are suggested.
Book Synopsis Effect of Microstructure on the Yield Strength and Stress Corrosion Resistance of 7075 Aluminium Alloy by : M. Hua
Download or read book Effect of Microstructure on the Yield Strength and Stress Corrosion Resistance of 7075 Aluminium Alloy written by M. Hua and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Modified Solution Heat Treatment on the Mechanical Properties and Stress Corrosion Cracking Susceptibility of Aluminum Alloy 7075 by : Alessandro Giuseppe Pagliarello
Download or read book Effects of Modified Solution Heat Treatment on the Mechanical Properties and Stress Corrosion Cracking Susceptibility of Aluminum Alloy 7075 written by Alessandro Giuseppe Pagliarello and published by . This book was released on 2011 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Research on the Basic Nature of Stress Corrosion for Various Structural Alloys at Room and Elevated Temperatures by : Frank A. Crossley
Download or read book Research on the Basic Nature of Stress Corrosion for Various Structural Alloys at Room and Elevated Temperatures written by Frank A. Crossley and published by . This book was released on 1963 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: Program objectives were: (1) to study the effect of microstructure on susceptibility to stress corrosion cracking in the short-transverse direction of 7075-T6 aluminum alloy; and (2) to study the kinetics of stress-corrosion cracking at elevated temperature of candidate materials for structural applications in the trisonic transport in the presence of sea salt. It was hypothesized that the poor resistance to stress corrosion of high-strength, wrought aluminum alloys was due to the layered-type microstructure characteristic of these materials. Short life was associated with the layered-type of grain structure characteristic of commercial material, and long life was associated with irregular or equiaxed grain structures. The experimental results gave good support to the hypothesis.
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 Research on the Basic Nature of Stress Corrosion for Various Structural Alloys at Room and Elevated Temperatures by : Frank A. Crossley
Download or read book Research on the Basic Nature of Stress Corrosion for Various Structural Alloys at Room and Elevated Temperatures written by Frank A. Crossley and published by . This book was released on 1963 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: Program objectives were: (1) to study the effect of microstructure on susceptibility to stress corrosion cracking in the short-transverse direction of 7075-T6 aluminum alloy; and (2) to study the kinetics of stress-corrosion cracking at elevated temperature of candidate materials for structural applications in the trisonic transport in the presence of sea salt. It was hypothesized that the poor resistance to stress corrosion of high-strength, wrought aluminum alloys was due to the layered-type microstructure characteristic of these materials. Short life was associated with the layered-type of grain structure characteristic of commercial material, and long life was associated with irregular or equiaxed grain structures. The experimental results gave good support to the hypothesis.
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 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Fracture Mechanics Study of Corrosion Fatigue by : R. A. M. Chandra Prasad
Download or read book A Fracture Mechanics Study of Corrosion Fatigue written by R. A. M. Chandra Prasad and published by . This book was released on 2022-09-26 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Majority of industrial components fail due to the conjoint actions of fatigue and corrosion. All fatigue failures including one in air can be categorized as corrosion fatigue. Absolute fatigue can take place only in vacuum or inert environment. The effect of corrosion on fatigue has been extensively studied by determining the stress vs. number of cycles (S-N) curve. S-N curve depicts the final fracture, it does not separate the crack initiation and crack propagation. The defect tolerant design based on fracture mechanics concepts assumes that some forms of defects are already present in the materials and a considerable life in spent in crack propagation before the final fracture. Measure of resistance of a material to crack growth (fracture toughness) then becomes extremely important. It is now possible to describe material property of fracture toughness in terms of applied intensity of stress near the crack tip (K). Fracture mechanics based on elastic material behavior (absence of significant yielding) , referred to as the linear elastic fracture mechanics (LEFM) is well suited to materials which have limited ductility. The stress intensity factor (K ) is used both for conditions of static loading (Stress Corrosion Cracking) and for the moving cracks during fatigue loading . In this book the results of corrosion fatigue crack growth on 7075 - Alclad alloy are presented. This alloy is widely used in aircraft and automobile industries. Corrosion resistance is obtained by cladding with a more corrosion resistant aluminum alloy. However, the corrosion protection system may undergo rupture especially during crack growth in the underlying metal. Environment will then play a dominant role in the crack growth process. The design of reliable aircraft structures requires provision that cracks do not propagate under cyclic loading to reach a critical size resulting in fracture. The understanding of crack propagation under the conjoint action of corrosion and fatigue is thus of great technological and economic significance. Conflicting observations have been reported in literature regarding the influence of microstructure and environmental variables on the corrosion crack propagation rates.
Book Synopsis Effect of Silver Addition on Mechanical Properties and Stress Corrosion Cracking in a Predeformed and Overaged 7055 Aluminum Alloy by : Mehdi Shakouri
Download or read book Effect of Silver Addition on Mechanical Properties and Stress Corrosion Cracking in a Predeformed and Overaged 7055 Aluminum Alloy written by Mehdi Shakouri and published by . This book was released on 2018 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of silver on mechanical properties and stress corrosion cracking (SCC) resistance in a predeformed and overaged 7055 aluminum alloy was investigated. The treatment consisted of solution treating the specimens and then applying 5 % plastic deformation (compression) before aging. The next operation was aging the specimens at 121°C for 24 hours and overaging them at 175°C for 10 hours. Properties of the alloys were investigated by mechanical testing, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and differential scanning calorimetry. Results show that the ultimate tensile strength (UTS) and yield tensile strength (YTS) for the silver-free alloy were 580 and 520MPa, respectively, and increased to 594 and 567MPa after the addition of 0.39 % silver. Moreover, the stress corrosion resistance increased = 23 % after adding 0.2 % silver. It can be seen that the addition of silver to predeformed and overaged 7055 aluminum alloy slightly improves the UTS and YTS and increases resistance to SCC significantly. These improvements are due to the interrupting effect of silver on the continuity of magnesium-rich precipitates and the increasing copper absorption in the precipitates.
Book Synopsis Corrosion of Aluminium by : Christian Vargel
Download or read book Corrosion of Aluminium written by Christian Vargel and published by Elsevier. This book was released on 2020-05-12 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of Aluminium, Second Edition, highlights the practical and general aspects of the corrosion of aluminium alloys. Chapters help readers new to the topic understand the metallurgical, chemical and physical features of aluminium alloys. Author Christian Vargel adopts a practitioner styled approach that is based on the expertise he has gained during a 40-year career in aluminium corrosion. The book assesses the corrosion resistance of aluminium, a key metric recognized as one of the main conditions for the development of many uses of aluminium in transport, construction, power transmission, and more. Features 600 bibliographic references, providing a comprehensive guide to over 100 years of related study Includes numerous illustrations to enhance study Presents practical applications across many industries Provides an accessible reference for both beginners and experts
Book Synopsis The Effect of Microstructure on the Stress-corrosion Susceptibility of an Al-Zn-Mg Alloy by : Anthony J. DeArdo
Download or read book The Effect of Microstructure on the Stress-corrosion Susceptibility of an Al-Zn-Mg Alloy written by Anthony J. DeArdo and published by . This book was released on 1970* with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Microstructure on the Stress-corrosion Susceptibility of an Al-Zn-Mg Alloy by : Anthony J. DeArdo (Jr.)
Download or read book Effect of Microstructure on the Stress-corrosion Susceptibility of an Al-Zn-Mg Alloy written by Anthony J. DeArdo (Jr.) and published by . This book was released on 1970 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Advanced Ingot Thermal-Mechanical Treatments on the Microstructure and Stress Corrosion Properties of Aluminum Alloy Forgings by : J. Zola
Download or read book Influence of Advanced Ingot Thermal-Mechanical Treatments on the Microstructure and Stress Corrosion Properties of Aluminum Alloy Forgings written by J. Zola and published by . This book was released on 1978 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new approach, the application of microstructure control to products possessing an optimized alloy chemistry, has been taken to develop an improved combination of properties in 7000 series wrought aluminum products. The technique developed is an ingot (intermediate) thermal-mechanical treatment (ITMT) process which optimizes the combination of static strength, fracture toughness, fatigue strength, and stress corrosion resistance of commercial aluminum alloy die forgings. Previously, high fracture toughness had been achieved in wrought products by sacrificing tensile strength or stress corrosion properties. The ITMT processes produce either a recrystallized grain structure by thermal treatments prior to working at lower-than-conventional (warm) working temperatures or an altered grain structure by hot working the previously recrystallized structure. In both cases, the resulting grain morphology is desirable for good fracture toughness. Results of testing forging material show that ITMT on a high purity 7475 alloy produces advantageous fatigue crack propagation rates in 3.5 percent salt solution in comparison to 7075-T73, and stress corrosion resistance equivalent to 7075-T73 in addition to attractive tensile properties and high fracture toughness.
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.
