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Superplasticity In Aerospace Aluminum
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Book Synopsis Superplasticity in Aerospace by : H. Charles Heikkenen
Download or read book Superplasticity in Aerospace written by H. Charles Heikkenen and published by American Society of Civil Engineers. This book was released on 1988 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers of the symposium held in Phoenix, Az., Jan. 1988. Applications of superplastic forming in aerospace manufacturing, as well as basic and applied research will be the focus of this publication. Major sections will detail mechanisms and failure modes of superplasticity; superplastic Al-Li alloys
Book Synopsis Superplasticity in Aerospace - Aluminium by : Roger Pearce
Download or read book Superplasticity in Aerospace - Aluminium written by Roger Pearce and published by . This book was released on 1985 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Superplastic Aerospace Aluminum Alloys by : Roger Grimes
Download or read book Superplastic Aerospace Aluminum Alloys written by Roger Grimes and published by . This book was released on 1992 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aluminum-Lithium Alloys by : S. Balasivanandha Prabu
Download or read book Aluminum-Lithium Alloys written by S. Balasivanandha Prabu and published by Elsevier Inc. Chapters. This book was released on 2013-09-20 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Superplastic Forming by : Suphal P. Agrawal
Download or read book Superplastic Forming written by Suphal P. Agrawal and published by . This book was released on 1985 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Superplasticity in Aerospace, Aluminum by : Roger Pearce
Download or read book Superplasticity in Aerospace, Aluminum written by Roger Pearce and published by . This book was released on 1985 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Superplasticity in aerospace - aluminium by : Larry Kelly
Download or read book Superplasticity in aerospace - aluminium written by Larry Kelly and published by . This book was released on 1985 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Superplastic Forming of Advanced Metallic Materials by : G Giuliano
Download or read book Superplastic Forming of Advanced Metallic Materials written by G Giuliano and published by Elsevier. This book was released on 2011-06-27 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra fine-grained metals can show exceptional ductility, known as superplasticity, during sheet forming. The higher ductility of superplastic metals makes it possible to form large and complex components in a single operation without joints or rivets. The result is less waste, lower weight and manufacturing costs, high precision and lack of residual stress associated with welding which makes components ideal for aerospace, automotive and other applications. Superplastic forming of advanced metallic materials summarises key recent research on this important process. Part one reviews types of superplastic metals, standards for superplastic forming, processes and equipment. Part two discusses ways of modelling superplastic forming processes whilst the final part of the book considers applications, including superplastic forming of titanium, aluminium and magnesium alloys. With its distinguished editor and international team of contributors, Superplastic forming of advanced metallic materials is a valuable reference for metallurgists and engineers in such sectors as aerospace and automotive engineering. Note: The Publishers wish to point out an error in the authorship of Chapter 3 which was originally listed as: G. Bernhart, Clément Ader Institute, France. The correct authorship is: G Bernhart, P. Lours, T. Cutard, V. Velay, Ecole des Mines Albi, France and F. Nazaret, Aurock, France. The Publishers apologise to the authors for this error. Reviews types of superplastic metals and standards for superplastic forming Discusses the modelling of superplastic forming, including mathematical and finite element modelling Examines various applications, including superplastic forming of titanium, aluminiun and magnesium alloys
Book Synopsis Superplasticity in Aerospace II by : Terry R. McNelley
Download or read book Superplasticity in Aerospace II written by Terry R. McNelley and published by Minerals, Metals, & Materials Society. This book was released on 1990 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents recent advances in superplastic forming technology, used in the deformation processing of building both propulsion and airframe aircraft. The 22 papers, from a symposium in Anaheim, California, February 1990, discuss ceramic, intermetallic, and composite materials; deformation modeling; app
Book Synopsis Grain Boundary Development in Superplastic Aluminum Alloys by : Michael Edward McMahon
Download or read book Grain Boundary Development in Superplastic Aluminum Alloys written by Michael Edward McMahon and published by . This book was released on 1996-12-01 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superplasticity may be defined as the capability of certain polycrystalline materials to deform to extensive plastic elongations prior to failure, often without formation of a neck. Typically, superplasticity refers to tensile elongations greater than 200%, although some elongations have been reported in excess of 5000% Ref 1. While it has been suggested that bronze metals in use in ancient civilizations may have possessed superplastic properties Ref 2, most historical reviews credit the modern-day documentation of superplastic behavior to a paper published in the Journal of the Institute of Metals by G.D. Bengough in 1912 which described extensive elongations in brass Ref 3. Recognition of a stress and strain-rate relationship was first presented qualitatively in a paper by Rosenhain in 1920 which examined a near eutectic Zn- Al-Cu alloy Ref 4. Photomicrographs detailing superplastic grain structures in eutectic Sn-Pb and Bi-Pb alloys deformed to elongations of 2000% were presented in 1934 by Pearson Ref 5. This study was the first to identify an equiaxed grain morphology in the deformed regions and suggest that grain boundary migration may be involved in the deformation processes.
Book Synopsis Application of Aluminium Alloy Superplasticity in Aerospace by : M Matsuo
Download or read book Application of Aluminium Alloy Superplasticity in Aerospace written by M Matsuo and published by . This book was released on 1986 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis SUPERPLASTIC AEROSPACE ALUMINUM ALLOYS. by : DR. ROGER. GRIMES
Download or read book SUPERPLASTIC AEROSPACE ALUMINUM ALLOYS. written by DR. ROGER. GRIMES and published by . This book was released on 2000 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Superplasticity in Metals and Ceramics by : T. G. Nieh
Download or read book Superplasticity in Metals and Ceramics written by T. G. Nieh and published by Cambridge University Press. This book was released on 1997-01-23 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes advances in the field of superplasticity, the ability of certain materials to undergo very large tensile strains. This phenomenon has increasing commercial applications, but also presents a fascinating scientific challenge in attempts to understand the physical mechanisms that underpin it. The authors emphasize the materials aspects of superplasticity. Beginning with a brief history of the phenomenon, they describe the two major types of superplasticity-- fine-structure and internal-stress superplasticity-- and discuss their operative mechanisms. They also present microstructural factors controlling the ductility and fracture in superplastic materials. Observations of superplasticity in metals (including aluminum, magnesium, iron, titanium and nickel), ceramics (including monoliths and composites), intermetallics (including iron, nickel, and titanium base), and laminates are thoroughly described. This is a valuable text for graduate students and researchers in materials science and engineering.
Book Synopsis Analysis of the Transition in Deformation Mechanisms in Superplastic 5083 Aluminum Alloys by Orientation Imaging Microscopy by : James W. Harrell
Download or read book Analysis of the Transition in Deformation Mechanisms in Superplastic 5083 Aluminum Alloys by Orientation Imaging Microscopy written by James W. Harrell and published by . This book was released on 2001-09-01 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently developed Orientation Imaging Microscopy (OIM) methods have been applied to the analysis of microstructure and microtexture of 5083 aluminum alloy materials that have been processed to enable superplasticity. The phenomenon of superplasticity allows economical forming of complex components while retaining the high strength- and stiffness-to-weight ratios characteristic of aluminum alloys used in automotive, aerospace and military applications. Superplasticity requires fine grains with high-angle boundaries and resistance to failure by cavitation. OIM permits grain-specific orientation determination and quantitative assessment of the grain-to-grain disorientation distribution as well as grain size measurement in materials. The current work offers significant new insights into the development and response of superplastic microstructures; in particular, OIM data may be employed to delineate the transition from slip to grain boundary sliding in superplastic 5083 materials.
Book Synopsis Processability and High Temperature Behavior of Emerging Aerospace Alloys by : C. Ghandhi
Download or read book Processability and High Temperature Behavior of Emerging Aerospace Alloys written by C. Ghandhi and published by . This book was released on 1990 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Part 1, a model for subgrain superplasticity has been developed. Aluminum alloys that contain low angle boundaries exhibit different superplastic behavior than alloys consisting of high angle boundaries. On a relative basis, the low angle boundaries increase the flow stress but impart a greater resistance to cavitation; the strain-rate sensitivity of this material is generally smaller and the change in the strain-rate sensitivity with strainrate shows a minimum instead of a maximum as observed in the large angle boundary materials. As a result, the subgrain material can be deformed to a large tensile strains at fast strain rates. A kinetic model for subgrain superplasticity that invokes a balance between the arrival and emission rates of disclosure at low angle boundaries is presented. It explains several features of subgrain superplasticity. It also explains why ultrafine dispersoids of intermetallics appear to stabilize the subgrain structure in aluminum. Early work on the correlation between flow stress and subgrain size in dynamic recrystallization of metals may also be consistent with the model. (JES).
Book Synopsis Superplasticity at High Strain Rates in Aluminum Alloys by :
Download or read book Superplasticity at High Strain Rates in Aluminum Alloys written by and published by . This book was released on 1996 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The detailed experimental data of microstructural developments during the optimum thermomechanical treatments and superplastic properties in the wide deformation range have been investigated on fourteen P/M aluminum alloys with various chemical matrix compositions and different typed precipitate particles. It was revealed that the differences in both size and volume among the second phase particles, which increase with content of Zr, Cr, Mn or Y, affect on the recrystallization behavior, grain size and superplastic properties of these aluminum alloys. Some of them exhibited high-strain-rate superplasticity, so the optimizing processing methods in this proposal were very powerful to provide the desired structures required for high-strain-rate superplasticity in these aluminum alloys. A theoretical interpretation, based on the experimental data by tensile test and the observed grain sizes, has been revealed that values in activation energy for all alloysare between 140 and 155 kJmol-1, which are similar to that for lattice self-diffusion of aluminum. Each mechanical data of each alloy can be presented by a single equation. It was postulated that superplastic flow in these P/M aluminum alloys was fundamentally controlled by a grain boundary sliding mechanism accommodated by dislocation climb controlled by lattice self-diffusion. However, for the statically recrystallized alloys consisted of the high-angle grain boundaries, the Dorn typed equation presents n=2, p=2 and D=D sub L, whereas for the dynamically recrystallized alloys with the low-angle grain boundaries, n=3, p=2 and D=D sub L. The consideration for deformation mechanisms with the accommodation helper by such a liquid has been applied on the aluminum alloys, but it remained unclear.
Book Synopsis Microstructural and Mechanical Property Characterization of Shear Formed Aerospace Aluminum Alloys by : Lillianne P. Troeger
Download or read book Microstructural and Mechanical Property Characterization of Shear Formed Aerospace Aluminum Alloys written by Lillianne P. Troeger and published by . This book was released on 2000 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced manufacturing processes such as near-net-shape forming can reduce production costs and increase the reliability of launch vehicle and airframe structural components through the reduction of material scrap and part count and the minimization of joints. The current research is an investigation of the processing-microstruture-property relationships for shear formed cylinders of the Al-Cu-Li-Mg-Ag alloy 2195 for space applications and the Al-Cu-Mg-Ag alloy C415 for airframe applications. Cylinders which had undergone various amounts of shear-forming strain were studied to correlate the grain structure, texture, and mechanical properties developed during and after shear forming.
