@article{597d9d5b52c3482c83c861f7c4941577,
title = "Colossal super saturation of oxygen at the iron-aluminum interfaces fabricated using solid state welding",
abstract = "Solid state joining is achieved in three steps, (i) interface asperity deformation, (ii) oxide dispersion, followed by (iii) atomic contact and bonding. Atomically clean metallic surfaces without an oxide layer bond spontaneously. Despite its importance the oxide dispersion mechanism is not well studied. In this work the first ever atom probe study of iron-aluminum solid state welds show that the oxygen concentration at the interface is 20 at.%. This is significantly lower than any equilibrium oxide concentration. We therefore propose that the high-strain rate deformation at the interfaces renders the oxide unstable resulting in the observed concentration of oxygen.",
keywords = "Atom probe tomography, Oxide dispersion, Solid state welding",
author = "N. Sridharan and D. Isheim and Seidman, {D. N.} and Babu, {S. S.}",
note = "Funding Information: The authors thank Prof Marcelo Dapino and Dr. Paul. J. Wolcott at the Ohio State University for providing samples. The authors also wish to thank the Israeli Ministry of Defense (IMOD) for funding this work under 1000309377. Atom-probe tomography was performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT). The LEAP tomograph at NUCAPT was purchased and upgraded with funding from NSF-MRI (DMR-0420532) and ONR-DURIP (N00014-0400798, N00014-0610539, N00014-0910781) grants. Instrumentation at NUCAPT was supported by the Initiative for Sustainability and Energy at Northwestern University (ISEN). This work made use of the EPIC facility of the NUANCE Center at Northwestern University. NUCAPT and NUANCE received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF NNCI-1542205) and the MRSEC program (NSF DMR-1121262) through Northwestern's Materials Research Center. NUANCE received support the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. The part of this research done at the Manufacturing Demonstration Facility was sponsored by the US Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office, under Contract DE-AC05-000R22725 with UT-Battelle, LLC.",
year = "2017",
month = mar,
day = "15",
doi = "10.1016/j.scriptamat.2016.11.040",
language = "English (US)",
volume = "130",
pages = "196--199",
journal = "Scripta Materialia",
issn = "1359-6462",
publisher = "Elsevier Limited",
}