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Title: Characterization of Explosively Bonded Interfaces for High Contaminant Sensitivity Environments.

Abstract

Abstract not provided.

Authors:
; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1426376
Report Number(s):
SAND2017-2446C
651498
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the TMS 2017 held February 26 - March 2, 2017 in San Diego, California, United States of America.
Country of Publication:
United States
Language:
English

Citation Formats

Underwood, Olivia De'Haven, Madison, Jonathan D, Deibler, Lisa Anne, and Rodelas, Jeffrey. Characterization of Explosively Bonded Interfaces for High Contaminant Sensitivity Environments.. United States: N. p., 2017. Web.
Underwood, Olivia De'Haven, Madison, Jonathan D, Deibler, Lisa Anne, & Rodelas, Jeffrey. Characterization of Explosively Bonded Interfaces for High Contaminant Sensitivity Environments.. United States.
Underwood, Olivia De'Haven, Madison, Jonathan D, Deibler, Lisa Anne, and Rodelas, Jeffrey. Wed . "Characterization of Explosively Bonded Interfaces for High Contaminant Sensitivity Environments.". United States. doi:. https://www.osti.gov/servlets/purl/1426376.
@article{osti_1426376,
title = {Characterization of Explosively Bonded Interfaces for High Contaminant Sensitivity Environments.},
author = {Underwood, Olivia De'Haven and Madison, Jonathan D and Deibler, Lisa Anne and Rodelas, Jeffrey},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2017},
month = {Wed Mar 01 00:00:00 EST 2017}
}

Conference:
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  • Flyer and parent plates were prepared from commercial pure copper plates (grain size: approximately 50um) as well as from single crystal plates of Cu grown by the Bridgman method. The plates were placed in a parallel stand-off configuration and explosively bonded at an estimated detonation velocity of 2.2km/s using an ANFO powder explosive. The nature of the interfaces produced was investigated by means of microhardness electron tests as well as optical, scanning and transmission electron microscopy. Extensive shock wave hardening was observed and the increase in hardness was a maximum at the interface. The bonded plates of polycrystalline materials weremore » fractured in a brittle mode along the interface, and on its maximum shear plane cracks were initiated. The yield strength of the interface was estimated to be 700MPa in the polycrystalline case and this is compared with that of the single crystal copper plates.« less
  • Abstract not provided.
  • An effort is underway at the Spallation Neutron Source (SNS) to change the design of the 1st Generation high-nickel alloy proton beam window (PBW) to one that utilizes aluminum for the window material. One of the key challenges to implementation of an aluminum PBW at the SNS was selection of an appropriate joining method to bond an aluminum window to the stainless steel bulk shielding of the PBW assembly. An explosively formed bond was selected as the most promising joining method for the aluminum PBW design. A testing campaign was conducted to evaluate the strength and efficacy of explosively formedmore » bonds that were produced using two different interlayer materials: niobium and titanium. The characterization methods reported here include tensile testing, thermal-shock leak testing, optical microscopy, and advanced scanning electron microscopy. All tensile specimens examined failed in the aluminum interlayer and measured tensile strengths were all slightly greater than the native properties of the aluminum interlayer, while elongation values were all slightly lower. A leak developed in the test vessel with a niobium interlayer joint after repeated thermal-shock cycles, and was attributed to an extensive crack network that formed in a layer of niobium-rich intermetallics located on the bond interfaces of the niobium interlayer; the test vessel with a titanium interlayer did not develop a leak under the conditions tested. Due to the experience gained from these characterizations, the explosively formed bond with a titanium interlayer was selected for the aluminum PBW design at the SNS.« less
  • Revisions in drilling and sampling techniques at a hazardous waste treatment facility were used to document potential migration of Appendix IX compounds through fine-grained lacustrine and glacial till sediments. The site is located in the Lake Calumet area of Chicago, Illinois. The facility property consists of land constructed of approximately 15 feet of rubble fill extending as a pier into the lake. Former hazardous waste management operations at the facility consisted of biochemical treatment of wastes within basins constructed in the fill. The purpose of the investigation was to evaluate if releases of contaminants had occurred, and to characterize themore » nature and extent of those contaminants. Soil samples of the underlying lacustrine clays were collected using hollow-stem augers, drilling muds and split spoon samplers. Concentrations of volatile organic compounds (VOCs) and semivolatile organics (SVOCs) in excess of 100,000 parts per billion were measured in samples collected from 10 feet below the saturated fill. Groundwater and soil samples collected from the fill yielded similar compounds at comparable concentrations. Large diameter casing was used to seal contaminated groundwater in the fill from the clay. No VOCs were measured in samples collected from the first 10 feet of the lacustrine material below the fill. Samples of the lacustrine and till sediments collected from depths of 15 and 40 feet below the fill yielded trace VOCs likely originating from outside (laboratory or sample handling) contamination sources. SVOCs measured in these samples were limited to phthalate compounds also attributed to outside contamination sources. The Phase 2 results indicate that the lacustrine and glacial till clays underlying the fill provide effective barriers to contaminant migration. In-situ and laboratory hydraulic tests on these deposits further confirm this conclusion.« less