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You searched on: Topic Area: Metals

Displaying records 1 to 10 of 42 records.
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1. Economic impact of applying high strength steels in hydrogen gas pipelines
Topic: Metals
Published: 6/17/2015
Authors: Jeffrey W Sowards, James R Fekete, Robert L Amaro
Abstract: Pipeline steel will likely be employed extensively to transport gaseous hydrogen in support of a future clean energy economy. To date, a hydrogen-specific cost analysis of pipeline installation has not been produced. This paper performs several cos ...

2. Spin-scattering rates in metallic thin films measured by ferromagnetic resonance damping enhanced by spin-pumping
Topic: Metals
Published: 6/12/2015
Authors: Carl T. Boone, Justin M Shaw, Hans Toya Nembach, Thomas J Silva
Abstract: We determined the spin-transport properties of Pd and Pt thin films by measuring the increase in ferromagnetic resonance damping due to spin-pumping in ferromagnetic (FM)-nonferromagnetic metal (NM) multilayers with varying NM thicknesses. The increa ...

3. Nondestructive measurement of the evolution of layer-specific mechanical properties in sub-10nm bilayer films
Topic: Metals
Published: 4/21/2015
Authors: Justin M Shaw, Kathleen Hoogeboom-Pot, Jorge Hernandez-Charpak, Henry Kapteyn, Margaret Murnane, Damiano Nardi
Abstract: ABSTRACT: We use short-wavelength extreme-ultraviolet light to independently measure the mechanical properties of disparate layers within a bilayer film with single-monolayer sensitivity. We show that in Ni/Ta nanostructured systems, while their dens ...

Topic: Metals
Published: 9/29/2014
Authors: Timothy S Weeks, Joseph David McColskey, Mark D. Richards, Yong-Yi Wang, Marie A Quintana
Abstract: The curved-wide plate (CWP) tests are frequently used for assessing the quality of pipeline girth welds. Despite a large number of CWP tests having been conducted at great expense over many decades, an industry consensus standard remains unavailable ...

Topic: Metals
Published: 8/29/2014
Authors: Jeffrey W Sowards, Elisabeth Mansfield
Abstract: Much of the gasoline sold in the U.S. is blended with ethanol. Some components associated with underground storage tanks (UST) dispensing these blended fuels (namely the sumps containing submersible pumps) are experiencing rapid degradation due t ...

6. Understanding the High-Temperature Mechanical Properties of A710 (HSLA-80) Steel Using Complimentary Atom Probe Tomography and Electron Microscopy
Topic: Metals
Published: 8/26/2014
Authors: Ann Chiaramonti Chiaramonti Debay, Jeffrey W Sowards, James R Fekete
Abstract: We investigated the mechanical properties as a function of isothermal annealing in alloy A710 (HSLA-80) using combined atom probe tomography and transmission electron microscopy.

7. X-Ray Micro-Beam Diffraction Measurement of the Effect of Thermal Cycling on Stress in Cu TSV: A Comparative Study
Topic: Metals
Published: 5/26/2014
Authors: Chukwudi Azubuike Okoro, Lyle E Levine, Yaw S Obeng, Klaus Hummler, Ruqing Xu
Abstract: Microelectronic devices are subjected to constantly varying temperature conditions during their operational lifetime, which can lead to their failure. In this study, we examined the impact of thermal cycling on the evolution of stresses in Cu TSVs us ...

8. Hydrogen traps in the outgassing model of a stainless steel vacuum chamber
Topic: Metals
Published: 3/31/2014
Author: Robert F Berg
Abstract: This article describes a model for hydrogen outgassing into a stainless steel vacuum chamber. It accounts for the geometry of the chamber components, the hydrogen dissolved in those components, and the processes of diffusion, recombination, and trapp ...

9. Precise determination of the spectroscopic {I}g{/I}-factor using broadband ferromagnetic resonance spectroscopy
Topic: Metals
Published: 12/27/2013
Authors: Justin M Shaw, Hans Toya Nembach, Thomas J Silva, Carl T. Boone
Abstract: We demonstrate that the spectroscopic {I}g{/I}−factor can be determined with high precision and accuracy by use of a broadband ferromagnetic resonance measurements and applying an asymptotic analysis to the data. Spectroscopic data used to det ...

10. X-Ray Micro-Beam Diffraction Determination of Full Stress Tensors in Cu TSVs
Topic: Metals
Published: 5/28/2013
Authors: Chukwudi Azubuike Okoro, Lyle E Levine, Oleg A Kirillov, Yaw S Obeng, Ruqing Xu, Jonathan Z Tischler, Wenjun Liu, Klaus Hummler
Abstract: We report the first non-destructive, depth resolved determination of the full stress tensor in Cu through-silicon vias (TSVs), using synchrotron based micro-beam X-ray diffraction. Two adjacent Cu TSVs were studied; one deliberately capped with SiO2, ...

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