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Topic Area: Materials Science
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Displaying records 391 to 400 of 520 records.
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391. Analysis of Welding Parameter Distribution in Stud Arc Welding
Topic: Materials Science
Published: 7/15/2007
Authors: Ivan Samardzic, Stefanija Klaric, Thomas Allen Siewert
Abstract: This paper describes the application of on-line monitoring system for recording welding current and voltage during stud arc welding with a ceramic ferrule. Recorded values of welding current and voltage are analyzed off-line for the weld process wi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50536

392. Tuning Polymer Melt Fragility With Antiplasticizer Additives
Topic: Materials Science
Published: 6/19/2007
Authors: Robert A Riggleman, Jack F Douglas, J J de Pablo
Abstract: A polymer-diluent model exhibiting antiplasticization has beendeveloped and characterized by molecular dynamics simulations. Antiplasticizer molecules are shown to decrease the glass transition temperature Tg, but to increase the elastic moduli o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852717

393. The Recovery of Elastic Properties at 35 C in Trip 700 Steel Following Deformation
Topic: Materials Science
Published: 6/1/2007
Authors: David J Pitchure, Richard E Ricker
Abstract: The influence of plastic deformation on the elastic properties that determine the magnitude of springback following forming was investigated using dynamic modulus analysis. For this study, the elastic modulus of TRIP 700 steel was measured continuou ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853488

394. Computer Simulations of Ionomer Self-Assembly and Dynamics
Topic: Materials Science
Published: 5/17/2007
Authors: Moonjoy Goswami, S K Kumar, Aniket Bhattacharya, Jack F Douglas
Abstract: Computer simulations of a model telechelic ionomer, i.e. a melt with a charge at each chain end along with neutralizing counterions, indicate a form of self-assembly that is hybrid between the packing driven interactions in block copolymers and the d ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852673

395. Influence of Indium-Tin Oxide Surface Structure on the Ordering and Coverage of Organosilane, Carboxylic Acid and Thiol Monolayers
Topic: Materials Science
Published: 5/17/2007
Authors: M Cerruti, C Rhodes, M Losego, A Efremenko, Jon-Paul Maria, Daniel A Fischer, D L Feldheim, S Franzen, Jan Genzer
Abstract: We report on the formation of organosilane-, carboxylic acid- and thiol-based self assembled monolayers (SAMs) on two lots of commercially prepared Indium Tin Oxide (ITO) thin films. Contact angle measurements, electrochemical experiments, and near- ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851046

396. Surface Organization, Light-Driven Surface Changes, and Stability of Semifluorinated Azobenzen Polymers
Topic: Materials Science
Published: 5/2/2007
Authors: X Li, Y Ando, S H Kang, A Hexemer, E K Kramer, Daniel A Fischer, Christopher K. Ober, M. Paik, S. Krishnan, F. You
Abstract: Fluoroazobenzene side groups were prepared with different lengths of -CF^d2^- segments and then attached to the isoprene block of poly(styrene-b-isoprene) diblock copolymers which were synthesized via anionic polymerization. The surface properties a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850732

397. Fracture Toughness through a Welded Pipeline Section - Crack Tip Opening Angle Criterion
Topic: Materials Science
Published: 4/23/2007
Authors: Philippe P. Darcis, Christopher N McCowan, Elizabeth S Drexler, Joseph David McColskey, Avigdor Shtechman, Thomas Allen Siewert
Abstract: The increasing demand for natural gas as an alternative energy source implies continued growth of gas pipeline installations. This trend compels the natural gas transmission industry to consider the construction of larger-diameter, higher-pressure pi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50531

398. Depletion of grain-boundary phase and elastic creep deformation upon ultra-long flexural stress rupture experiments of NC-132 silicon nitride
Topic: Materials Science
Published: 4/18/2007
Authors: H J Kleebe, W Braue, George David Quinn
Abstract: Two MgO-doped Si3N4 specimens (Norton, NC-132) were tested in ultra-long flexure stress rupture experiments with an external load of 266 MPa, i.e., 14.941 and 17.376 hours. Following mechanical testing, the materials were characterized by transmissi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850955

399. Elastic constants and internal friction of martensitic steel, ferritic-pearlitic steel, and {alpha}-iron
Topic: Materials Science
Published: 4/15/2007
Authors: Sudook A Kim, Ward L Johnson
Abstract: The elastic constants and internal friction of induction hardened and unhardened SAE 1050 plain-carbon steel were determined by acoustic resonance spectroscopy. The hardened specimen contained only martensite and the unhardened specimen was ferrite-p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50255

400. X-Ray Standing Wave Analysis of Overlayer Induced Substrate Relaxation: The Clean and Bi-covered (110) GaP Surface
Topic: Materials Science
Published: 4/1/2007
Authors: A Herrera-Gomez, Joseph C Woicik, T Kendelewicz, K E Miyano, W E Spicer
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854331



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