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Displaying 101 - 125 of 1456

Tuning of Tungsten Thin Film Superconducting Transition Temperature for Fabrication of Photon Number Resolving Detectors

June 1, 2005
Author(s)
Adriana Lita, Danna Rosenberg, Sae Woo Nam, Aaron J. Miller, Davor Balzar, L. M. Kaatz, R. E. Schwall
… Tungsten thin films can form in one of two crystal … for equal deposition conditions, affect the T c s of the tungsten films. We have used x-ray diffraction to determine the structure of tungsten thin films and film stress. The results indicates … Tuning of Tungsten Thin Film Superconducting Transition Temperature for …

Connection Model for the Seismic Analysis of Welded Steel Moment Frames.

May 1, 1998
Author(s)
John L. Gross
… is described for performing seismic evaluation of welded steel moment frame buildings constructed prior to the 1994 … fracture models are capable of predicting the behavior of steel moment frame buildings and of estimating the level of … brittle fracture, inelastic analysis, seismic performance, steel structures, welded connections …

Dynamic Plasticity Model for Rapidly Heated 1045 Steel Up to 1000 degC

August 27, 2021
Author(s)
Steven Mates, Shengyen Li
… the machining process. Measurements of American Iron and Steel Institute1045 steel behavior up to 1000 °C showed complex thermal softening … to capture the flow stress and hardening evolution of 1045 steel under rapidly heated conditions for simulating metal … carbon steel, constitutive model, high strain rate, high …

A Direct Analysis Method for Drift-Sensitive Steel Moment Frames

February 17, 2011
Author(s)
John L. Harris
… Design interaction equations for steel members in a moment frame are formulated based on … design approach in the 2005 Specification for Structural Steel Buildings – AISC 360-05 (AISC, 2005a), Appendix 7 - … Seismic, Steel Moment Frame, Drift, Direct Analysis Method …

Extension of the Steele 10-4-3 Potential for Adsorption Calculations in Cylindrical, Spherical, and Other Pore Geometries

August 24, 2011
Author(s)
Daniel Siderius, Lev D. Gelb
… In this Letter we reinterpret the widely-used Steele 10-4-3 potential for a gas molecule interacting with a … pores. These new potentials correctly recover the Steele result in the limit of infinite pore radius, a useful … via density functional theory the new cylindrical Steele potential gives markedly different behavior than …

Influence of H2S on the pitting corrosion of 316L stainless steel

January 18, 2021
Author(s)
James Hesketh, E.J.F. Dickinson, May Martin, G. Hinds, Alan Turnbull
… Coupon immersion tests were performed on 316L stainless steel in a simulated oilfield environment to evaluate the … Stainless steel, SEM, TEM, pitting corrosion … Influence of H2S on the pitting corrosion of 316L stainless steel …

Visualization of Structural Steel Product Models

May 1, 2003
Author(s)
Robert R. Lipman, K A. Reed
… developed to provide a means for users to visualize the steel structure represented by a CIMsteel Integration … CIMsteel Integration Standards, CIS2, product models, steel construction, VRML … Visualization of Structural Steel Product Models …

Transgranular Cracking in a Liquid Zn Embrittled High Strength Steel

January 15, 2020
Author(s)
Diptak Bhattacharya, Lawrence Cho, Ellen Van der Aa, Hassan Ghassemi-Armaki, Andreas Pichler, Kip O. Findley, John G. Speer
… In the present study, a Zn-coated high strength steel was deformed at an intercritical temperature; and the … Liquid metal embrittlement, high strength steel, Zn, intercritical, ferrite, transgranular cracking … Cracking in a Liquid Zn Embrittled High Strength Steel …

FATIGUE CRACK GROWTH RATES OF API X70 PIPELINE STEELS IN PRESSURIZED HYDROGEN GAS COMPARED WITH AN X52 PIPELINE IN HYDROGEN SERVICE

September 1, 2017
Author(s)
Elizabeth S. Drexler, Andrew J. Slifka, Robert L. Amaro, Damian S. Lauria, Jeffrey W. Sowards
… the code is being modified to include higher strength steels, such as X70. Fatigue crack growth (FCG) tests were … transporting hydrogen gas, as well as two X70 pipeline steels. The compact tension specimens were tested in hydrogen … between the FCG rates of the base metal among the three steels at a given hydrogen pressure. All three base metals …

APPLICATION OF A MODEL OF HYDROGEN-ASSISTED FATIGUE CRACK GROWTH IN 4130 STEEL

July 31, 2017
Author(s)
Andrew Slifka, Robert L. Amaro, Devin T. O'Connor, Benjamin E. Long, Elizabeth S. Drexler
… element model to predict the cyclic lifetime of 4130 steel cylinders under the influence of hydrogen. This example … of microstructure. The model was calibrated to the 4130 steel material by use of tensile tests and experimental FCG … fatigue crack growth rate, hydrogen, modeling, pipeline, steel …

Lateral Resistance Reduction to Cold-Formed Steel-Framed Shear Walls under Various Fire Scenarios

March 5, 2020
Author(s)
Matthew S. Hoehler, Blanca Andres Valiente, Matthew F. Bundy
… This paper examines the structural response of cold-formed steel-framed building lateral force- resisting systems under … and fire loading. Full-scale experiments with gypsum-sheet steel composite panel sheathed walls, oriented strand board sheathed walls, and steel strap braced walls are presented. Twenty-two test …

Fatigue measurement of pipeline steels for application of gaseous hydrogen transport

February 5, 2018
Author(s)
Andrew J. Slifka, Elizabeth S. Drexler, Robert L. Amaro, Louis E. Hayden, Damian S. Lauria, Nikolas W. Hrabe, Douglas G. Stalheim
… to determine the fatigue crack growth rate of pipeline steels in pressurized hydrogen gas was completed; the project … B31.12 Committee on Hydrogen Piping and Pipelines. Four steels were selected, two X52 and two X70 alloys. Other … X52 materials. These American Petroleum Institute (API) steels are designated based on yield strength, and monotonic …

Impact of Detailing on the Lateral Performance of Cold-Formed Steel Framed Walls

June 27, 2022
Author(s)
Zhidong Zhang, Matthew Speicher, Amanpreet Singh, Tara Hutchinson, Benjamin Schafer
… ductility design of wall-lines constructed of cold-formed steel (CFS) framed steel sheet shear walls. A key structural detail that … CFS, Seismic, Steel, Structural, Shear wall … of Detailing on the Lateral Performance of Cold-Formed Steel Framed Walls …

Numerical modeling of the post-fire performance of strap-braced cold-formed steel shear walls

February 1, 2022
Author(s)
Shuna Ni, Xia Yan, Matthew Hoehler, Thomas Gernay
… Strap-braced, cold-formed steel framed walls are frequently used as the lateral force resisting system in cold-formed steel construction. While the behavior of these walls has … paper, a numerical model of a strap-braced cold-formed steel wall is developed to analyze the thermal and structural …

CTOA Testing of Pipeline Steels Using MDCB Specimens

September 1, 2013
Author(s)
Robert L. Amaro, Jeffrey W. Sowards, Elizabeth S. Drexler, Joseph D. McColskey, Christopher N. McCowan
… relative resistance to crack extension of various pipeline steels. In general, the smaller the CTOA value, the lower the … extension rates near 30 m/s for high-toughness linepipe steels. In-service crack extensions for ductile crack … CTOA Testing of Pipeline Steels Using MDCB Specimens …

Thermal Performance of Fire Resistive Materials III. Fire Test on a Bare Steel Column

April 1, 2009
Author(s)
Dale P. Bentz, Leonard M. Hanssen, Boris Wilthan
… model to predict the performance of FRM-insulated steel columns in a standard ASTM International E119 fire … a simpler fire test of a single bare W14x233 structural steel column was conducted in the column furnace at a … against the measured emissivity of the structural steel. The resultant safety factor is found to be on the …

Comparison of Machining Simulations for 1045 Steel to Experimental Measurements

March 1, 2004
Author(s)
Robert W. Ivester, Michael Kennedy
… range of machining conditions using American Iron and Steel Institute (AISI) 1045 steel. This paper focuses on comparing finite-element model … AISI 1045 Steel, finite-element modeling, machining experiments, … Comparison of Machining Simulations for 1045 Steel to Experimental Measurements …

Carbon-Containing Tetragonal Defects in 316L Austenitic Stainless Steel Carburized Under Paraequilibrium Conditions: An Internal Friction Study

June 1, 2007
Author(s)
A H. Heuer, F Ernst, H Kahn, G M. Michal, David J. Pitchure, Richard E. Ricker
… paraequilibrium, carburization of stainless steel. Low temperature carburization of stainless steels … internal friction, point defect clusters, stainless steel, strengthening mechanisms … Tetragonal Defects in 316L Austenitic Stainless Steel Carburized Under Paraequilibrium Conditions: An …

Tungsten Transition-Edge Sensors for IR/Optical/UV Photon Counting

June 1, 2003
Author(s)
Aaron J. Miller, Sae Woo Nam, John M. Martinis, Alexander V. Sergienko
… Tungsten transition-edge sensors have been demonstrated to … for the first time. This paper gives a background on tungsten TES (W-TES) technology and major applications and … Tungsten Transition-Edge Sensors for IR/Optical/UV Photon …

Fire Resistance of Cold-Formed Steel Framed Shear Walls under Various Fire Scenarios

July 16, 2019
Author(s)
Blanca Andres Valiente, Matthew Hoehler, Matthew Bundy
… force-resisting systems commonly used in cold-formed steel framed buildings. Gypsum- sheet steel composite panel sheathed walls, oriented strand board sheathed walls, and steel strap braced walls are investigated. Post-flashover … cold-formed steel, fire, fire following earthquake, gypsum-sheet steel …
Displaying 101 - 125 of 1456
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