Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Cold-welding"”.
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Scuffing of Aluminum/steel Contacts Under Dry Sliding Conditions
… existing protective surface layers, and finally cold welding due to adhesion between bare metal surfaces.
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Molecular dynamics simulations of metallic friction and of its dependence on electric currents: development and first results
… of friction and verify the importance of cold-welding and plastic deformations in dry sliding friction. Our first data also show a mechanism for decoupling between load and friction at high velocities. Such a mechanism can explain an increase in the coefficient of friction of metals with …
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Sistemi e dispositivi meccanici applicati a processi fisici e chimici
… and submitted to a mechanical load. This induces cold-welding, fracturing and plastic deformation processes mediated by the generation, migration, and interaction of lattice defects. Depending on the nature of the powder and of its surroundings, the microstructural refinement can be accompanied by …
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Friction stir welding of commercially available superplastic aluminium
… also represent an evolution of friction stir welding by starting with a milling machine; a very basic piece of engineering workshop equipment. This was then replaced by a modified milling machine with force monitoring capabilities and finally using a state of the art dedicated FSW machine for …
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Caracterización del proceso de soldadura por puntos por fricción agitación empleando el análisis de señales vibroacústicas
Welding plays an important role in industrial processes, among the most important of which are electronic arc welding with consumable and non-consumable electrode; solid phase welding (cold welding, by friction, by explosion, by ultrasound, by diffusion, among others); gas welding, etc. Towards the …
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Effects of nonhomogeneous cementation in soils on resistance to earthquake effects
… by either a variety of cementing agents or by cold welding at points of grain contact. They are generally quite difficult to sample, but artificially cemented sands have been shown to aptly model the behavior of natural materials, and allow for better test controls. Consequently, artificial …
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Multiscale physics-based modeling of friction
… of certain materials exhibit severe adhesion, cold welding and galling behavior as demonstrated experimentally in this work. If these behaviors are modeled at asperity-scale, then the friction at rough contact scale can be obtained by the same procedure presented in this work. This flexibility …
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The role of microstructure on the combustion and impact behavior of mechanically activated nickel/aluminum reactive composites
… as opposed to water, decreased the amount of cold-welding on the milling jar walls and media. This reduced the finial yield of fine particles (< 106 <em>μm</em>) and increased the concentration of solid solutions, and intermetallics. As a result of this loss in available heat release, …