November 30, 2020

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Aluminum-Lithium Alloys

Aluminum-Lithium Alloys
Author : N Eswara Prasad,Amol Gokhale,R.J.H Wanhill
Publisher : Butterworth-Heinemann
Release Date : 2013-09-20
Category : Technology & Engineering
Total pages :608
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Because lithium is the least dense elemental metal, materials scientists and engineers have been working for decades to develop a commercially viable aluminum-lithium (Al-Li) alloy that would be even lighter and stiffer than other aluminum alloys. The first two generations of Al-Li alloys tended to suffer from several problems, including poor ductility and fracture toughness; unreliable properties, fatigue and fracture resistance; and unreliable corrosion resistance. Now, new third generation Al-Li alloys with significantly reduced lithium content and other improvements are promising a revival for Al-Li applications in modern aircraft and aerospace vehicles. Over the last few years, these newer Al-Li alloys have attracted increasing global interest for widespread applications in the aerospace industry largely because of soaring fuel costs and the development of a new generation of civil and military aircraft. This contributed book, featuring many of the top researchers in the field, is the first up-to-date international reference for Al-Li material research, alloy development, structural design and aerospace systems engineering. Provides a complete treatment of the new generation of low-density AL-Li alloys, including microstructure, mechanical behavoir, processing and applications Covers the history of earlier generation AL-Li alloys, their basic problems, why they were never widely used, and why the new third generation Al-Li alloys could eventually replace not only traditional aluminum alloys but more expensive composite materials Contains two full chapters devoted to applications in the aircraft and aerospace fields, where the lighter, stronger Al-Li alloys mean better performing, more fuel-efficient aircraft

Aluminum-Lithium Alloys

Aluminum-Lithium Alloys
Author : R.J.H. Wanhill
Publisher : Elsevier Inc. Chapters
Release Date : 2013-09-20
Category : Technology & Engineering
Total pages :608
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The material and manufacturing property requirements for selection and application of 3rd generation aluminium-lithium (Al–Li) alloys in aircraft and spacecraft are discussed. Modern structural concepts using Laser Beam Welding (LBW), Friction Stir Welding (FSW), SuperPlastic Forming (SPF) and selective reinforcement by Fibre Metal Laminates (FMLs) are also considered. Al–Li alloys have to compete with conventional aluminium alloys, Carbon Fibre Reinforced Plastics (CFRPs) and GLAss REinforced FMLs (GLARE), particularly for transport aircraft structures. Thus all these materials are compared before discussing their selection for aircraft. This is followed by a review of the aluminium alloy selection process for spacecraft. Actual and potential applications of 3rd generation Al–Li alloys are presented. For aircraft it is concluded that the competition between different material classes (aluminium alloys, CFRPs and FMLs) has reached a development stage where hybrid structures, using different types of materials, may become the rule rather than the exception. However, aluminium alloys are still the main contenders for spacecraft liquid propellant launchers.

Aluminum-Lithium Alloys

Aluminum-Lithium Alloys
Author : Olga Grushko,Boris Ovsyannikov,Viktor Ovchinnokov
Publisher : CRC Press
Release Date : 2016-11-18
Category : Technology & Engineering
Total pages :308
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Aluminum–Lithium Alloys: Process Metallurgy, Physical Metallurgy, and Welding provides theoretical foundations of the technological processes for melting, casting, forming, heat treatment, and welding of Al–Li alloys. It contains a critical survey of the research in the field and presents data on commercial Al–Li alloys, their phase composition, microstructure, and heat treatment of the ingots, sheets, forgings, and welds of Al–Li alloys. It details oxidation kinetics, protective alloying, hydrogen in Al–Li alloys, and crack susceptibility. It also discusses grain structure and solidification, as well as structural and mechanical properties. The book is illustrated with examples of Al–Li alloy applications in aircraft structures. Based on the vast experience of the coauthors, the book presents recommendations on solving practical problems involved with melting and casting ingots, welding of Al–Li alloys, and producing massive stampings for welded products. Provides comprehensive coverage of Al–Li alloys, not available in any single source. Presents research that is at the basis of the production technology for of ingots and products made of Al–Li alloys. Combines basic science with applied research, including upscaling and industrial implementation. Covers welding of Al–Li alloys in detail. Discusses gas and alkali-earth impurities in Al–Li alloys. Describes technological recommendations on casting and deformation of Al–Li alloys.

Aluminum-Lithium Alloys

Aluminum-Lithium Alloys
Author : Vijaya Singh,Amol A. Gokhale
Publisher : Elsevier Inc. Chapters
Release Date : 2013-09-20
Category : Technology & Engineering
Total pages :608
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Information on the technology of melting and casting aluminium lithium alloys is rarely published. Therefore, this chapter presents important findings from many research investigations on various aspects of melting, casting and cast structure development of Al-Li alloys. Presence of reactive element such as Li in the molten alloy requires special melt protection techniques, containment materials, alloying practices and casting equipment. Problem of grain refinement, linked to the presence of Zr in most commercial compositions, has also been discussed. Finally, it is surmised that the lower Li contents present in the third generation alloys compared to their older counterparts is expected to ease difficulties in their melting and casting.

Aluminum-Lithium Alloys

Aluminum-Lithium Alloys
Author : K.V. Jata,A.K. Singh
Publisher : Elsevier Inc. Chapters
Release Date : 2013-09-20
Category : Technology & Engineering
Total pages :608
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This chapter describes the development of crystallographic texture and its effects on mechanical properties in aluminum-lithium alloys. Crystallographic texture evolves during the forming of wrought products from cast ingots of Al-Li alloys and consequently affects the mechanical properties. Practical approaches to control the texture have been developed and have been successfully used in the products obtained from industrial-scale ingots. This texture tailoring has significantly reduced the yield strength anisotropy. In addition, theoretical approaches have been used to model the yield strength anisotropy of aluminum alloys in the presence of complex precipitates.

Aluminum-Lithium Alloys

Aluminum-Lithium Alloys
Author : S. Balasivanandha Prabu,K.A. Padmanabhan
Publisher : Elsevier Inc. Chapters
Release Date : 2013-09-20
Category : Technology & Engineering
Total pages :608
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Since the late 1950s, lithium is being used as an alloying element in aluminum. Their excellent ductility, which allows superplastic forming, along with their ability to decrease the density, makes aluminum-lithium alloys a primary choice for many structural applications in aerospace industry. This chapter initially discusses the processes and mechanisms that give rise to significant plasticity/Superplasticity in these alloy systems. The superplastic behavior of Al-Li alloys and their applications in forming are then discussed. The thickness variation during superplastic forming strongly depends on the peak strain rate sensitivity index (m) of the material, and an increase in the m value reduces the thickness variation in the formed component. The factors that help increase the value of m are enumerated. Superplastic forming is carried out at temperatures ≥ 0.5 Tm (Tm is the absolute melting temperature), often closer to 0.7 − 0.8 Tm. Significant cavitation and grain growth are present at such high temperatures. This has ushered in low temperature superplastic forming by the production of ultra-fine grain sizes via dispersion strengthening and severe plastic deformation (SPD). The promise of superplastic forming of Al-Li alloys for the future and the factors including cost that limit the use of Al-Li alloys are also discussed.

Aluminium-lithium Alloys

Aluminium-lithium Alloys
Author : Anonim
Publisher : Unknown
Release Date : 1986
Category : Aluminum alloys
Total pages :129
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Aluminum-Lithium Alloys

Aluminum-Lithium Alloys
Author : K. Satya Prasad,N. Eswara Prasad,Amol A. Gokhale
Publisher : Elsevier Inc. Chapters
Release Date : 2013-09-20
Category : Technology & Engineering
Total pages :608
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This chapter reviews the precipitation and precipitate phases that occur during heat treatments in multi-component Al-Li based alloys. It describes aspects related to nucleation, growth, morphology and orientation relationships of the strengthening precipitates δ’ and T1, the toughening precipitate S’ and the recrystallisation-inhibiting precipitate β’. Equilibrium precipitate phases such as T2, which are deleterious to the mechanical and corrosion properties of the alloys, are also described. It is shown that careful alloy chemistry control, two-step homogenization and controlled stretching prior to ageing can be employed to improve the volume fraction and distribution of the precipitate phases. All these processing aspects are necessary to achieve optimum combinations of properties for the alloys.

Aluminium-lithium Alloys III

Aluminium-lithium Alloys III
Author : Colin Baker
Publisher : Maney Pub
Release Date : 1986
Category : Technology & Engineering
Total pages :640
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Aluminum-Lithium Alloys

Aluminum-Lithium Alloys
Author : B. Saha,R.J.H. Wanhill,N. Eswara Prasad,G. Gouda,K. Tamilmani
Publisher : Elsevier Inc. Chapters
Release Date : 2013-09-20
Category : Technology & Engineering
Total pages :608
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Airworthiness regulatory bodies are authorised and responsible for verifying and ensuring the safety and reliability of aircraft. There are many civil and military aviation organisations and regulatory bodies. The functions and responsibilities of several of these organizations are summarised in this chapter. Owing to the importance of aircraft structural fatigue, a survey of fatigue design philosophies is also given. This is followed by (i) a discussion of the airworthiness certification methodology for materials and structures, starting with the initial mill products and proceeding via incremental levels to the finished aircraft; and (ii) an example of material certification for an aluminium–lithium (Al-Li) alloy that is a candidate for use in the airframes of light combat aircraft (LCA).

Aluminum-Lithium Alloys for Aerospace Applications Workshop

Aluminum-Lithium Alloys for Aerospace Applications Workshop
Author : Biliyar N. Bhat,Thomas T. Bales,E. J. Vesely
Publisher : Unknown
Release Date : 1994
Category : Aluminum-lithium alloys
Total pages :356
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Aluminum-lithium Alloys

Aluminum-lithium Alloys
Author : Ramesh J. Kar,Suphal P. Agrawal,William E. Quist
Publisher : Asm International
Release Date : 1988
Category : Technology & Engineering
Total pages :465
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Environmental Fatigue in Aluminum-lithium Alloys

Environmental Fatigue in Aluminum-lithium Alloys
Author : Anonim
Publisher : Unknown
Release Date : 1992
Category :
Total pages :27
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Aluminum-lithium Alloys

Aluminum-lithium Alloys
Author : T. H. Sanders
Publisher : Unknown
Release Date : 1989
Category : Aluminum-lithium alloys
Total pages :1716
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Stress-corrosion Behavior of Aluminum-lithium Alloys in Aqueous Environments

Stress-corrosion Behavior of Aluminum-lithium Alloys in Aqueous Environments
Author : Anonim
Publisher : Unknown
Release Date : 1983
Category :
Total pages :32
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