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You searched on: Topic Area: Materials Science

Displaying records 381 to 390 of 420 records.
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381. A Coupled Arc and Droplet Model of GMAW
Topic: Materials Science
Published: 1/8/2005
Authors: Timothy P Quinn, M Szanto, T Gilad, I Shai
Abstract: A model of gas metal arc welding was developed that solves the magneto-hydrodynamic equations for the flow and temperature fields of the molten electrode and the plasma simultaneously, to form a fully coupled model. A commercial finite element code ...

382. McMurdie
Topic: Materials Science
Published: 12/3/2004
Authors: Alan D. Mighell, Gasper J. Piermarini, Winnie K Wong-Ng
Abstract: Howard F. McMurdie - known as Mac to his friends oa colleagues--was an exemplar of good living. Blessed with excellent health, a loving family, and many close colleagues, Mac was active and productive to the very end. It is therefore with the deepe ...

383. Phase Relations, Crystal Chemistry, and Dielectric Properties in Sections of the La^d2^O^d3^-CaO-MgO-TiO^d2^ System
Topic: Materials Science
Published: 6/1/2004
Authors: Terrell A Vanderah, Val R Miller, Igor Levin, S M Bell, T Negas
Abstract: Subsolidus phase equilibria, crystal chemistry, and dielectric behavior were studied for the La^d2^O^d3^ MgO TiO^d2^ system and for the ternary sections LaMg^d1/2^Ti^d1/2^O^d3^ CaTiO^d3^ La^d2^O^d3^ and LaMg^d1/2^Ti^d1/2^O^d3^ CaTiO^d3^ 0.5La^d2/3^Ti ...

384. Stresses in shape memory polymer-matrix nanocomposites for biomedical applications
Topic: Materials Science
Published: 6/1/2004
Authors: Davor Balzar, G Stefanic, Kenneth Gall, Martin Dunn, Yiping Liu
Abstract: We report on the residual stresses in amorphous shape memory polymers reinforced with SiC particles. After 50 % compression of the composite material at 25 ¿C, the SiC particles exhibit a compressive stress, which is almost completely released during ...

385. Residual stress determination by diffraction: Modeling and applications
Topic: Materials Science
Published: 1/1/2004
Authors: Davor Balzar, N C Popa
Abstract: Residual stress plays an important role in shaping Iilaterials properties. We present both the method to determine texture-weighted strain orientation distribution function for arbitrary crystal and sample symmetries and an example of the determinati ...

386. Nanometrology - FY 2003 Program and Selected Accomplishments
Series: NIST Interagency/Internal Report (NISTIR)
Topic: Materials Science
Published: 12/15/2003
Authors: C M Allocca, Stephen Weil Freiman
Abstract: The emphasis on nanotechnology around the world is leading to the development and commercialization of unique products based upon significantly smaller devices and material ensembles. Materials at the nanoscale in three dimensions (NEMS, MEMS), two ...

387. First-Principles Calculations of the Dielectric Properties of Perovskite-Type Materials
Topic: Materials Science
Published: 11/1/2003
Author: Eric J Cockayne
Abstract: We compare first-principles (FP) calculations of the ionic effective charges, phonon frequencies, and static dielectric permittivities k^ds^ of several perovskite-type materials. Transition metal ions have anomalously large effective charges, though ...

388. Combinatorial Chemistry
Topic: Materials Science
Published: 10/13/2003
Authors: J D. Hewes, Debra L Kaiser, Alamgir Karim, Eric J. Amis
Abstract: In 1995, the rapid fabrication of tens, hundreds, and, eventually, tens of thousands of samples in two-dimensional arrays of discrete microscaled samples (pixels) using lithography methods developed for the electronics industry was reported. Importan ...

389. BridgeLCC 2.0 Users Manual: Life-Cycle Costing Software for the Preliminary Design of Bridges (NIST GCR 03-853)
Series: Grant/Contract Reports (NISTGCR)
Report Number: 03-853
Topic: Materials Science
Published: 9/1/2003
Author: M A Ehlen
Abstract: BridgeLCC 2.0 is user-friendly software developed by the National Institute of Standards and Technology to help bridge designers determine the cost effectiveness of alternative bridge designs, construction and repair strategies, and construction mat ...

390. Combining Magnets and Dielectrics: Crystal Chemistry in the BaO-Fe^d2^O^d3^-TiO^d2^ System
Topic: Materials Science
Published: 4/1/2003
Authors: T Siegrist, Terrell A Vanderah
Abstract: Phases observed in the Ba-Fe-Ti-O system are classified and described within the framework of close packed [O,Ba/O] layers, with the transition metals in either octahedral (titanium and iron) or tetrahedral (iron only) sites. The resulting crystal c ...

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