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Showing 1 to 15 of 15 for “"Aluminum-Lithium"”.
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Hydrogen embrittlement of Aluminum-Lithium alloys
… hydrogen on the mechanical properties of aluminum-lithium alloys: 2090, 2091, and Weldalite 049, and to compare with the effects on aluminum-copper 2219 alloy. Prior to mechanical testing, aging studies were performed for 2090 and 2219 using microhardness Vickers to determine the peak aged …
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Micromechanical models of delamination in aluminum-lithium alloys
Aluminum lithium (Al-Li) alloys are lighter, stiffer, and tougher than conventional aerospace aluminum alloys. Replacing conventional aluminums with Al-Li could substantially decrease the weight and cost of aerospace structures. However, Al-Li alloys often fracture intergranularly via a mechanism …
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Characterization of Delamination in 2099-T861 Aluminum-Lithium
Aluminum-lithium alloys provide a lower density and higher stiffness alternative to other high strength aluminum alloys. However, many Al-Li alloys exhibit a non-traditional failure mechanism, delamination. Delamination refers to the failure along the grain boundary interface. The delamination …
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Effects of crack arresting delaminations in aluminum-lithium alloys
Made available in DSpace on 2010-05-19T18:38:20Z (GMT). No. of bitstreams: 4 Hernquist_Thesis_opt.pdf: 6706271 bytes, checksum: bed37ee45a2aaa5b5dd1b76036d9d235 (MD5) final thesis.docx: 53203185 bytes, checksum: 4f9e95020501b4b07c3e54b80d49fe55 (MD5) Hernquist_Mark.pdf: 6707593 bytes, checksum: …
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Transformation kinetics of delta prime precipitation in aluminum-lithium alloys
Restriction data tranferred 2014-07-01T11:16:23-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission
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A parametric study of delaminations in an aluminum-lithium alloy
… and increased strength have placed advanced aluminum-lithium alloys at the forefront of aerospace materials research. Delaminations in these alloys play a significant role in their fracture processes. Therefore, a more complete understanding of the factors that influence the behavior of these …
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Phase transformations and deformation behavior in the aluminum-lithium-zirconium system
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1985.
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Ultrasonics studies of point defects in iron, aluminum-lithium, and gallium arsenide
The ultrasonics studies undertaken in this work illustrate the applicability of ultrasonics to a broad variety of problems. In the case of Fe, the objective is to measure the production and annealing of the diaelastic effect of self-interstitials in Fe. Frenkel Pairs created by 2.3 MeV electron …
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Total Fume and Heavy Metals Emission Factors Applicable to Aluminum-Lithium Alloy Welding
… by the Tungsten Inert-Gas (TIG) welding on Aluminum-Lithium Alloy (Al-Li Alloy), estimate applicable emission factors, and identify the heavy metal concentrations of lead, manganese, and chromium. Although there are numerous metals and various welding procedures this study will focus on …
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Molecular Elucidation of Reaction Mechanisms in Aluminum & Lithium Metal Batteries by Solid-State NMR Spectroscopy and Electrochemical Methods
… vehicles emphasize high energy densities. Aluminum and lithium metal batteries hold great promise for next-generation energy storage due to their large specific capacities (2980 mA h g<sup>-1</sup>, and 3860 mA h g<sup>-1</sup>, respectively). In particular, aluminum metal is low cost, has …
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Investigation of Taylor impact test of isotropic and anisotropic material through geometrical characteristics of specimens
… copper alloy) and anisotropic material (2195-T8 aluminum-lithium alloy) are investigated using Taylor impact tests. Coordinate measuring machines (CMMs) are used to measure the shape of specimens after the deformation. The geometrical data enables us to determine the plastic distributions and the …
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In situ measurement of lattice strain using synchrotron radiation and a conical slit system
… to measure lattice strain components from an aluminum-lithium sample during tensile loading is presented in detail. The conical slit system at Argonne National Laboratory’s Advanced Photon Source is utilized to isolate a single grain with an orientation of interest from the highly textured …
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Exploration of incompatibility in Al-Li alloys using high energy diffraction microscopy and a crystal plasticity model
Aluminum-lithium (Al-Li) alloys have inherently desirable properties such as increased specific stiffness and strength. Without question, these alloys would be candidate materials for many aerospace structural designs if it were not for a complicated and confounding mode of fracture termed …
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Studies in the theory of solids
… emission, and L ,3 2 absorption spectra of aluminum are shown to exhibit threshold shapes which cannot all be consistently explained using the present form of the threshold theory. We show that the threshold theory predicts a dramatic change in the absorption threshold of lithium if …