... Robert MacKenzie, Vaida Auzelyte, Sven Olliges, Ralph Spolenak, Harun H. Solak, and Janos Vör... more ... Robert MacKenzie, Vaida Auzelyte, Sven Olliges, Ralph Spolenak, Harun H. Solak, and Janos Vörös Introduction A nanowire is an extremely thin wire with a diameter on the order of a few nanome-ters and with lengths orders of magnitude larger than its diameter. ...
An X-ray microdiffraction dedicated beamline, combining white and monochromatic beam capabilities... more An X-ray microdiffraction dedicated beamline, combining white and monochromatic beam capabilities, has been built at the Advanced Light Source. The purpose of this beamline is to address the myriad of problems in Materials Science and Physics that require submicron x-ray beams for structural characterization. Many such problems are found in the general area of thin films and nano-materials. For instance, the ability to characterize the orientation and strain state in individual grains of thin films allows us to measure structural changes at a very local level. These microstructural changes are influenced heavily by such parameters as deposition conditions and subsequent treatment. The accurate measurement of strain gradients at the micron and sub-micron level finds many applications ranging from the strain state under nano-indenters to gradients at crack tips. Undoubtedly many other applications will unfold in the future as we gain experience with the capabilities and limitations of...
Grain-to-grain interactions dominate the plasticity of Al thin films and establish effective leng... more Grain-to-grain interactions dominate the plasticity of Al thin films and establish effective length scales smaller than the grain size. We have measured large strain distributions and their changes under plastic strain in 1.5-microm-thick Al 0.5% Cu films using a 0.8-microm-diameter white x-ray probe at the Advanced Light Source. Strain distributions arise not only from the distribution of grain sizes and orientation, but also from the differences in grain shape and from stress environment. Multiple active glide plane domains have been found within single grains. Large grains behave like multiple smaller grains even before a dislocation substructure can evolve.
... Robert MacKenzie, Vaida Auzelyte, Sven Olliges, Ralph Spolenak, Harun H. Solak, and Janos Vör... more ... Robert MacKenzie, Vaida Auzelyte, Sven Olliges, Ralph Spolenak, Harun H. Solak, and Janos Vörös Introduction A nanowire is an extremely thin wire with a diameter on the order of a few nanome-ters and with lengths orders of magnitude larger than its diameter. ...
An X-ray microdiffraction dedicated beamline, combining white and monochromatic beam capabilities... more An X-ray microdiffraction dedicated beamline, combining white and monochromatic beam capabilities, has been built at the Advanced Light Source. The purpose of this beamline is to address the myriad of problems in Materials Science and Physics that require submicron x-ray beams for structural characterization. Many such problems are found in the general area of thin films and nano-materials. For instance, the ability to characterize the orientation and strain state in individual grains of thin films allows us to measure structural changes at a very local level. These microstructural changes are influenced heavily by such parameters as deposition conditions and subsequent treatment. The accurate measurement of strain gradients at the micron and sub-micron level finds many applications ranging from the strain state under nano-indenters to gradients at crack tips. Undoubtedly many other applications will unfold in the future as we gain experience with the capabilities and limitations of...
Grain-to-grain interactions dominate the plasticity of Al thin films and establish effective leng... more Grain-to-grain interactions dominate the plasticity of Al thin films and establish effective length scales smaller than the grain size. We have measured large strain distributions and their changes under plastic strain in 1.5-microm-thick Al 0.5% Cu films using a 0.8-microm-diameter white x-ray probe at the Advanced Light Source. Strain distributions arise not only from the distribution of grain sizes and orientation, but also from the differences in grain shape and from stress environment. Multiple active glide plane domains have been found within single grains. Large grains behave like multiple smaller grains even before a dislocation substructure can evolve.
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