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Topic Area: Environment/Climate

Displaying records 21 to 30 of 445 records.
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21. Physical and chemical characterization techniques for metallic powders
Topic: Environment/Climate
Published: 8/28/2013
Authors: John A. Slotwinski, Paul E Stutzman, Stephanie S Watson, Edward Joseph Garboczi, Max A Peltz, Chiara F Ferraris
Abstract: Systematic studies have been done on two different powder materials used for additive manufacturing: stainless steel and cobalt-chrome. An extensive array of characterization techniques were applied to these two powders. The physical techniques inclu ...

22. Sensors and Monitoring to Assess Grout and Vault Behavior for Performance Assessments
Topic: Environment/Climate
Published: 8/12/2013
Authors: Kenneth Alan Snyder, Jason Weiss
Abstract: To support performance assessment (PA) of waste vaults and grout monoliths, the National Institute of Standards and Technology (NIST) has performed a preliminary evaluation of the state-of-the-art of sensors, nondestructive evaluation methods, and an ...

23. Additive Manufacturing: Overview and NDE Challenges
Topic: Environment/Climate
Published: 7/26/2013
Author: John A. Slotwinski
Abstract: Additive manufacturing (AM) processes are capable of producing highly complex and customized parts, without the need for dedicated tooling, and can produce parts directly from the part design information. These types of processes are poised to revolu ...

24. Infrared Thermography for Laser-Based Powder Bed Fusion Additive Manufacturing Processes
Topic: Environment/Climate
Published: 7/26/2013
Authors: Shawn P Moylan, Eric Paul Whitenton, Brandon M Lane, John A. Slotwinski
Abstract: Additive manufacturing (AM) has the potential to revolutionize discrete part manufacturing, but improvements in processing of metallic materials are necessary before AM will see widespread adoption. A better understanding of AM processes, resulting ...

25. Porosity of Additive Manufacturing Parts for Process Monitoring
Topic: Environment/Climate
Published: 7/26/2013
Authors: John A. Slotwinski, Edward Joseph Garboczi
Abstract: Some metal additive manufacturing processes can produce parts with internal porosity, either intentionally (with careful selection of the process parameters) or unintentionally (if the process is not well understood.) Material porosity is undesirable ...

26. Multi-resonant plasmonic nanodome arrays for label-free biosensing applications
Topic: Environment/Climate
Published: 7/10/2013
Authors: Charles J. Choi, Stephen Semancik
Abstract: The characteristics and utility of plasmonic nanodome arrays capable of supporting multiple resonance modes are described. A low-cost, large-area replica molding process is used to produce, on flexible plastic substrates, two-dimensional periodic arr ...

27. Metrology for Additive Manufacturing - Opportunities in a Rapidly Emerging Technology
Topic: Environment/Climate
Published: 7/1/2013
Authors: John A. Slotwinski, Thomas A. Campbell
Abstract: Additive Manufacturing (AM) is a group of emerging technologies that create objects from the bottom-up by adding material one cross-sectional layer at a time. The AM process begins with a three-dimensional model of the object, usually created by comp ...

28. Lessons Learned in Establishing the NIST Metal Additive Manufacturing Laboratory
Series: Technical Note (NIST TN)
Report Number: 1801
Topic: Environment/Climate
Published: 6/21/2013
Authors: Shawn P Moylan, John A. Slotwinski, April Cooke, Kevin K Jurrens, M Alkan Donmez
Abstract: This publication presents a summary of lessons learned by NIST staff during establishment of the NIST Metal Additive Manufacturing Laboratory and implementation of the metal additive manufacturing capability at NIST. These lessons learned result ...

29. Fabricating HD-2(Fe) type Gas Proportional Counters: A Practical Guide to Techniques, Procedures and Operations
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7936
Topic: Environment/Climate
Published: 6/5/2013
Authors: George A Klouda, Jeffrey R. Anderson, John E Fuller III
Abstract: Over the last eight years, gas (filled) proportional counters (GPCs) of the HD-2(Fe) type (Davis et al., 1968, 1972; Wink et al., 1993) have been fabricated at NIST through a collaboration of the Materials Measurement Science Division, Facility f ...

30. Results from the International Halocarbons in Air Comparison Experiment (IHALACE)
Topic: Environment/Climate
Published: 6/1/2013
Authors: Bradley Hall, George C Rhoderick, A Engel, J. Muhle, J. W. Elkins, F. Artuso, E. Atlas, M. Aydin, D. Blake, E. G. Brunke, S. Chiavarini, P. J. Fraser, J. Happell, P. B. Krummel, I. Levin, M. Loewenstein, M. Malone, S. A. Montzka, S. O'Doherty, S. Reimann, E. S. Saltzman, H. E. Scheel, L. P. Steele, M. K. Vollmer, R. F. Weiss, D. Worthy, Y. Yokouchi
Abstract: The International Halocarbons in Air Comparison Experiment (IHALACE) was conducted to document relationships between calibrations scales among various laboratories that measure atmospheric greenhouse and ozone depleting gases. Six stainless steel cyl ...

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