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Displaying 51 - 75 of 1456

UV Light From the Ground Term of Ti-Like Ytterbium, Tungsten, and Bismuth

May 1, 2000
Author(s)
James V. Porto, John D. Gillaspy
… in the 3d 4 ground term of Ti-like Ytterbium and Tungsten. These results extend the range of measurements of … spectroscopy of highly charged ions, titanium-like, tungsten, wavelengths, Ytterbium … UV Light From the Ground Term of Ti-Like Ytterbium, Tungsten, and Bismuth …

Dielectric and Structural Studies of Ba 2 ReNb 3 Ti 2 O 15 (BReNTO 15 ,Re=Bi 3+ ,La 3+ ,Nd 3+ ,Sm 3+ ,Gd 3+ ) Tetragonal Tungsten Bronze Structured Ceramics

February 19, 2017
Author(s)
Igor Levin, M Stennett, I Reaney, G Miles, D I. Woodward, C Kirk, A R. West
… and dielectric properties of a new family of tetragonal tungsten bronze structured ceramics with the general formula, … ferroelectrics, relaxors, tetragonal tungsten bronzes … 15 ,Re=Bi 3+ ,La 3+ ,Nd 3+ ,Sm 3+ ,Gd 3+ ) Tetragonal Tungsten Bronze Structured Ceramics …

Guidelines for Fire Design of Steel Beam-Columns: Part II, Beams.

November 22, 2011
Author(s)
M. M. Dwaikat, V. K. Kodur
… Steel structures when exposed to fire develop significant … into consideration the fire induced forces that develop in steel beamcolumns. To overcome these drawbacks, a performance based fire design guidelines for steel beam-columns and restrained beams is developed as part …

Proceedings of the Automated Steel Construction Workshop June 6-7, 2002

February 19, 2017
Author(s)
Alan M. Lytle, Kamel S. Saidi
… Technology, in cooperation with the American Institute of Steel Construction, sponsored a workshop on automated steel construction on June 6-7, 2002, at the NIST … of new technologies to facilitate automating the steel construction process. Desired outcomes included both a …

Fatigue Crack Growth Rates in Five Pipeline Steels

September 1, 2006
Author(s)
Arry Bussiba, Philippe P. Darcis, J D. McCloskey, Christopher N. McCowan, Thomas A. Siewert, Gabriel Kohn, R P. Smith, J. Merritt
… This study presents fatigue data for six different pipeline steels, with strengths ranging from Grade B to X100. A … using a Middle Tension (MT) type specimen. The six steels showed similar fatigue crack growth rate (da/dN) … behavior. There were only minor differences among the steels for the threshold values and most of the stable crack …

Reference Correlations for the Density and Thermal Conductivity, and Review of the Viscosity Measurements, of Liquid Titanium, Zirconium, Hafnium, Vanadium, Niobium, Tantalum, Chromium, Molybdenum, and Tungsten

January 22, 2024
Author(s)
Eleftheria Ntonti, Sofia Sotiriadou, Marc Assael, Marcia L. Huber, Boris Wilthan, Manabu Watanabe
… vanadium, niobium, tantalum, chromium, molybdenum, and tungsten have been critically examined with the intention of … vanadium, niobium, tantalum, chromium, molybdenum, and tungsten, characterized by an expanded uncertainty (95 %) of … niobium, tantalum, titanium, thermal conductivity, tungsten, zirconium, vanadium, viscosity …

The Performance of a Nanocrystalline Tungsten Composite in Ballistic Impacts

September 1, 2001
Author(s)
L S. Magness, L Kesckes, Frank S. Biancaniello, Stephen D. Ridder, M Chung, D Kapoor
… A novel tungsten heavy alloy with a nanocrystalline microstructure was produced. Tungsten powders were ball milled in a controlled atmosphere … testing, the penetration performance of the nanostructured tungsten composite was compared to those of penetrators of …

DEFORMATION LIMITS AND ROTATIONAL CAPACITIES FOR CONNECTIONS UNDER COLUMN LOSS

October 12, 2016
Author(s)
Jonathan Weigand, Joseph Main
… For structural steel framing systems subjected to column loss, the ultimate … collapse via the alternative load path analysis method. Steel gravity framing systems subjected to column loss … of these rotation limits to column loss scenarios in steel gravity framing systems can be non-conservative. In …

Application of ASCE 41 to a two-story CFS building

October 22, 2020
Author(s)
Matthew Speicher, Zhidong Zhang, Benjamin W. Schafer
… seismic design provisions: ASCE 41-17, on a cold-formed steel framed building sited in a location with high seismic … to be deficient. The work highlights that, for cold-formed steel framing, even though ASCE 41 is based on the same … Cold-Formed Steel Research Consortium Colloquium …

Process Sensitivity of GMAW: Aluminum vs. Steel

April 1, 2002
Author(s)
Timothy P. Quinn
… when welding with aluminum electrodes compared to that of steel electrodes. The aluminum model was verified with … transfer dominates other effects in aluminum compared to steel, which causes the differences in sensitivity of the … (current, wire-feed speed, and/or voltage). If the steel and aluminum electrode extensions are compared at about …

High-Temperature, Tensile, Constitutive Data for World Trade Center Steels

October 16, 2008
Author(s)
William E. Luecke, Stephen W. Banovic, Joseph D. McColskey
… high-temperature tensile constitutive data for nine steels recovered from the fire and impact floors of the World Trade Center. Microstructurally, the nine steels represent typical structural steels from the 1970s. It reports the true stress-strain … Tensile, Constitutive Data for World Trade Center Steels …

Temperature-Dependent Material Modeling for Structural Steels: Formulation and Application

April 15, 2016
Author(s)
Mina S. Seif, William E. Luecke, Lisa Y. Choe, Joseph A. Main, Joseph D. McColskey, Chao Zhang, Jonathan M. Weigand, John L. Gross, Fahim Sadek
… temperature-dependent material model for structural steels. First it presents a model for computing the … material modeling methodology is presented for structural steels and bolts at elevated temperatures that incorporates … Temperature-Dependent Material Modeling for Structural Steels: Formulation and Application …

Uncertainties in Steel Temperatures during Fire

August 4, 2013
Author(s)
Dilip K. Banerjee
… In order to determine the fire resistance of steel members, steel temperatures must be estimated with a high confidence. … study, uncertainties in both unprotected and protected steel temperatures are estimated with the use of a Monte … uncertainty, heat transfer model, Monte Carlo method, fire, steel, composite floor system, fire resistance tests. …

High-temperature tensile constitutive data and models for structural steels in fire

November 30, 2011
Author(s)
William E. Luecke, Stephen W. Banovic, Joseph D. McColskey
… the stress-strain behavior of a collection of structural steels recovered from the collapse of the World Trade Center. These steels, combined with literature data form the basis of a model for the stress-strain behavior of structural steels in general. The model accounts for the lost of …

Effects of Specimen Geometry on Fatigue-Crack Growth Rates in Pipeline Steels

September 29, 2008
Author(s)
John M. Treinen, Philippe P. Darcis, Joseph D. McColskey, R. Smith, J. Merritt
… crack growth rates (FCGR) in API X65 and X100 pipeline steels was explored using the middle tension and compact … the stage II linear fatigue crack growth region for these steels. Furthermore, the FCGR behavior in the longitudinal … direction was found to be nearly identical for both steels. Also of interest was a comparison of the FCGR results …

Influence of Fire on the Shear Capacity of Steel-Sheathed Cold-Formed Steel Framed Shear Walls

June 6, 2018
Author(s)
Matthew S. Hoehler, Blanca Andres Valiente
… of real fires on the lateral load-carrying capacity of steel-sheathed cold-formed steel framed shear walls. The completed Phase 1 tests showed … cold-formed steel, fire, lateral force-resisting systems, shear wall, … Influence of Fire on the Shear Capacity of Steel-Sheathed Cold-Formed Steel Framed Shear Walls …

Laser Spot Welding of Additive Manufactured 304L Stainless Steel

February 1, 2022
Author(s)
Brian Simonds, Cheryl Hawk, Stephen Liu, Daniel Javernick, Robin Pacheco, Michael Brand, Jack Tanner, Greg Vigil
… to understand if an additively manufactured 304L stainless steel exhibited similar spot welding behavior as wrought 304L stainless steel. Due to the many differences between an additively … in wrought and additively manufactured 304L stainless steel were investigated. The coupling efficiency of wrought …

Role of microstructure and composition in resisting hydrogen embrittlement of fastener grade steels

July 13, 2009
Author(s)
Nicholas Nanninga, Jack Grochowski, Lloyd Heldt, Karl Rundman
… of hydrogen embrittlement for several fastener grade steels has been determined. The technique used to assess the resistance to hydrogen embrittlement of the steels was the rising step load test on notched tensile … rising step load results from different fastener grade steels with similar microstructures. In most cases, the alloy …
Displaying 51 - 75 of 1456
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