U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Edward Garboczi (Assoc)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 226 - 250 of 456

Interplay of particle shape and suspension properties: a study of cube-like particles

March 20, 2015
Author(s)
Debra J. Audus, Ahmed M. Hassan, Edward J. Garboczi, Jack F. Douglas
With advances in anisotropic particle synthesis, particle shape is now a feasible parameter for tuning suspension properties. However, there is a need to determine how these newly synthesized particles affect suspension properties and a need to solve the

X-ray CT imaging and finite element computations of the elastic properties of a rigid organic foam compared to experimental measurements: Implications for foam grade differences and process control

March 17, 2015
Author(s)
Edward Garboczi, Aaron M. Forster, Jan Miller, Chen-Luh Lin, Cesar Chan, Kumar Natesaiyer, David Song, Suman Sinha-Ray
A combined computational/experimental materials science technique was developed for acquiring the structure of a rigid organic foam (ROHACELL) using X-ray computed tomography with appropriate image analysis, computing the elastic moduli using large-scale

Modeling the apparent and intrinsic viscoelastic relaxation of hydrating cement paste

January 31, 2015
Author(s)
Xiaodan Li, Zachary Grasley, Edward Garboczi, Jeffrey W. Bullard
Finite element procedures combined with microstructure development modeling are integrated to quantitatively predict the viscoelastic/viscoplastic relaxation of cement paste due to intrinsic calcium silicate hydrate viscoelasticity and microstructure

Metrology Needs for Metal Additive Manufacturing Powders

January 29, 2015
Author(s)
John A. Slotwinski, Edward Garboczi
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

Computing elastic moduli on 3-D X-ray computed tomography image stacks

December 10, 2014
Author(s)
Edward Garboczi, Volodymyr Kushch
A common numerical task is to compute the effective elastic properties of a random composite material based on its microstructure by operating on a 3D digital image of the microstructure obtained via X-ray computed tomography (CT). The 3-D image is usually

Characterization of Metal Powders Used for Additive Manufacturing

September 16, 2014
Author(s)
John A. Slotwinski, Edward J. Garboczi, Paul E. Stutzman, Chiara F. Ferraris, Stephanie S. Watson, Max A. Peltz
Additive manufacturing (AM) techniques can produce complex, high-value metal parts, with potential applications as critical parts such as those found in aerospace components. The production of AM parts with consistent and predictable properties requires

Porosity Measurements and Analysis for Metal Additive Manufacturing Process Control

September 16, 2014
Author(s)
John A. Slotwinski, Edward J. Garboczi, Keith M. Hebenstreit
Additive manufacturing techniques can produce complex, high-value metal parts, with potential applications as critical metal components such as those found in aerospace engines and as customized biomedical implants. Material porosity in these parts is

Corrosion Detection in Concrete Rebars Using a Spectroscopic Technique

January 11, 2014
Author(s)
Edward J. Garboczi, Paul E. Stutzman, Shuangzhen S. Wang, Nicos Martys, Dat Duthinh, Virgil Provenzano, Shin G. Chou, David F. Plusquellic, Jack T. Surek, Sung Kim, Robert D. McMichael, Mark D. Stiles, Ahmed M. Hassan
Detecting the early corrosion of steel in reinforced concrete is a goal that has been much pursued. Since 2010, NIST has been working on a large project to develop an electromagnetic (EM) probe that detects the actual corrosion products via spectroscopic

Measurement and Simulation of Millimeter Wave Scattering Cross-sections from Steel-Reinforced Concrete

January 11, 2014
Author(s)
Ahmed M. Hassan, Edward Garboczi, Robert McMichael, Jack T. Surek, Mark D. Stiles, David F. Plusquellic, Virgil Provenzano, Paul E. Stutzman, Shuangzhen S. Wang, Sung Kim, Michael D. Janezic, Jason Coder, Nicos Martys, David R. Novotny
Some iron oxide corrosion products exhibit antiferromagnetic magnetic resonances (AFMR) at around 100 GHz at normal temperatures. AFMR can be detected in laboratory conditions, which serves as the basis for a new non-destructive spectroscopic method for

Application of physical and chemical characterization techniques to metallic powders

August 28, 2013
Author(s)
Edward J. Garboczi, John A. Slotwinski, Max A. Peltz, Chiara F. Ferraris, Stephanie S. Watson, Paul E. Stutzman
Systematic studies have been done on two different powder materials used for additive manufacturing: stainless steel and cobalt-chrome. The characterization of these powders is important in NIST efforts to develop appropriate measurements and standards for