Microstructural characterization and stress corrosion cracking susceptibility of Al-An-Mg-Ti alloys PDF Download

Author: C. Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 18

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Author: C. Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 19

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Book Description
The effects of adding small amounts of titanium to age-hardening Al-Zn-Mg alloys have been studied by transmission electron microscopy, mechanical atests, and stress corrosion cracking (SCC) tests. The zinc, magnesium, and titanium content of the alloys was varied and the effect of aging upon these alloys was examined. Multiple stages of aging were observed for several of the titanium addition alloys. The resistance to SCC of the Al-Zn-Mg ternary in an aqueous solution (3.5%NaCl) at room temperature was significantly improved in the titanium addition alloy with 0.12% as compared to an alloy with 0.23% Ti reported upon previously. The addition of 0.09%Ti to Al-7%Zn-2%Mg alloy produces a finer grain boundary precipitation and no deleterious effect on the SCC property. (Author).

Author: C. Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 22

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Book Description
A comparison of the stress corrosion cracking (SCC) susceptibility of four aluminum-zinc-magnesium alloys was determined as a function of processing and composition variables, particularly aging treatment and titanium additions. The SCC tests were performed employing a four point loaded constant moment apparatus in a 3.5% sodium chloride solution at room temperature. The alloys were studied as part of a microstructure and microcomposition characterization program in order to determine the effect of these variables on the SCC susceptibility and mechanical properties of the Al-Zn-Mg system. (Modified author abstract).

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1028

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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Author: Dennis F. Hasson
Publisher: Elsevier
ISBN: 1483218325
Category : Technology & Engineering
Languages : en
Pages : 495

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Book Description
Treatise on Materials Science and Technology, Volume 28: Materials for Marine Systems and Structures provides an integrated approach, utilizing the environmental information of the ocean scientists, materials science, and structural integrity principles as they apply to offshore structures and ships. The book discusses the materials and their performance in marine systems and structures; the marine environment; and marine befouling. The text also describes marine corrosion; corrosion control; metallic materials for marine structures; and concrete marine structures. Materials for mooring systems and fracture control for marine structures are also considered. Professional scientists and engineers, as well as graduate students in the fields of ocean and marine engineering and naval architecture and associated fields will find the book useful.

Author:
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ISBN:
Category :
Languages : en
Pages : 0

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The stress corrosion cracking susceptibility and general corrosion characteristics of four thermomechanically processed high-Magnesium, Aluminum-Magnesium alloys were evaluated and compared to those of 7076-T6. Results obtained from stress-corrosion testing and from tension testing after stress-corrosion exposure indicate that these 8-10% Mg alloys are less susceptible to stress-corrosion cracking than 7075-T6. The addition of Cu or Cu and Mn to a 10% Mg alloy raises strength, homogenizes the microstructure and reduces the tendency of such an alloy to exhibit intergranular cracking and exfoliation, especially in a sensitized condition. Results of accelerated general corrosion testing and marine exposure both indicate that binary 8% Mg and 10% Mg alloys are highly resistant to corrosion. Alloying with Cu or Cu and Mn accelerates weight loss but to a lesser degree than observed for 7075-T6. (Author).

Author: Larry Edward Beberdick
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 85

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Book Description
The stress corrosion cracking susceptibility and general corrosion characteristics of four thermomechanically processed high-Magnesium, Aluminum-Magnesium alloys were evaluated and compared to those of 7076-T6. Results obtained from stress-corrosion testing and from tension testing after stress-corrosion exposure indicate that these 8-10% Mg alloys are less susceptible to stress-corrosion cracking than 7075-T6. The addition of Cu or Cu and Mn to a 10% Mg alloy raises strength, homogenizes the microstructure and reduces the tendency of such an alloy to exhibit intergranular cracking and exfoliation, especially in a sensitized condition. Results of accelerated general corrosion testing and marine exposure both indicate that binary 8% Mg and 10% Mg alloys are highly resistant to corrosion. Alloying with Cu or Cu and Mn accelerates weight loss but to a lesser degree than observed for 7075-T6. (Author).

Author: F. H. Haynie
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 52

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Book Description
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).

Author: Anthony J. DeArdo
Publisher:
ISBN:
Category : Aluminum-magnesium-zinc alloys
Languages : en
Pages : 97

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Author: G L Song
Publisher: Woodhead Publishing
ISBN: 9781845697082
Category : Technology & Engineering
Languages : en
Pages : 0

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Book Description
The use of magnesium alloys is increasing in a range of applications, and their popularity is growing wherever lightweight materials are needed. This book provides a comprehensive account of the corrosion of magnesium alloys. It covers not only the corrosion performances and mechanisms of Mg alloys in conventional environments, such as sodium chloride solutions, but also looks at their corrosion behaviours in special media, like engine coolants and simulated body fluids. Part one covers fundamentals such as the corrosion electrochemistry, activity and passivity of magnesium and its alloys. Part two then considers the metallurgical effect in relation to the corrosion of magnesium alloys, including the role of micro-structure and earth-rare elements, the corrosion behaviour of magnesium-based bulk metallic glasses, and the corrosion of innovative magnesium alloys. Part three goes on to describe environmental influences on the corrosion of magnesium alloys, such as atmospheric corrosion, stress corrosion cracking, creep and fatigue behaviour, and galvanic corrosion. Finally, part four is concerned with various means of protecting magnesium alloys against corrosion through the use of aluminium electrodeposition, conversion and electrophoretic coatings, and anodisation. With its distinguished editor and team of contributors, this book is an invaluable resource for metallurgists, engineers and designers working with magnesium and its alloys, as well as professionals in the aerospace and automotive industries.