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You searched on: Topic Area: Materials Science

Displaying records 291 to 300 of 408 records.
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291. The Influence Of Hydrogen On The Elastic Modulus And Anelastic Response Of Cold Worked Pure Iron
Topic: Materials Science
Published: 7/1/2009
Authors: Richard E Ricker, David J Pitchure
Abstract: Understanding the influence of hydrogen on elastic deformation and anelastic response should contribute to our understanding of the influence of hydrogen on deformation and fracture. To accomplish this objective, samples of pure iron were cold-worked ...

292. Internal tin Nb3Sn conductors engineered for fusion and particle accelerator applications
Topic: Materials Science
Published: 6/22/2009
Authors: Jeffrey Parrell, Y. Zhang, Michael Field, M Meinesz, Yonghua Huang, H Miao, Seungok Hong, Najib Cheggour, Loren Frederick Goodrich
Abstract: The critical current density (Jc) of Nb3Sn strand has been significantly improved over the last several years. For most magnet applications, high Jc internal tin has displaced bronze process strand. The highest Jc values are obtained from distributed ...

293. Determination of the Electron Escape Depth for NEXAFS Spectroscopy
Topic: Materials Science
Published: 6/2/2009
Authors: Daniel A Fischer, K E Sohn, M D Dimitriou, Jan Genzer, C Hawker, E. J Kramer
Abstract: Depth profiling using near-edge X-ray absorption fine structure (NEXAFS) spectroscopy was used to determine the carbon atom density as a function of depth by analyzing the post-edge signal in NEXAFS spectra. We show that the common assumption in the ...

294. High Strain Rate Tissue Simulant Measurements Using digital Image Correlation
Topic: Materials Science
Published: 6/1/2009
Authors: Steven P Mates, Richard L. Rhorer, Richard Everett, Kirth Simmonds, Amit Bagchi
Abstract: Measuring the response of soft materials to high strain rate deformation is extremely challenging because of the difficulty of achieving dynamic equilibrium during high strain rate mechanical testing such as Kolsky bar testing. Digital image correlat ...

295. Capillary Instability in Nanoimprinted Polymer Films
Topic: Materials Science
Published: 5/21/2009
Authors: Kyle J. Alvine, Yifu Ding, Hyun Wook Ro, Brian C. Okerberg, Alamgir Karim, Christopher L Soles, Jack F Douglas
Abstract: Capillary forces play an active role in defining the equilibrium structure of nanoscale structures. This effect can be especially pronounced in soft materials such as polymers near or above their glass transition temperatures where material flow is ...

296. Response of Vascular Smooth Muscle Cells Under Mechanical Deformation Using Silane-Linked Laminin
Topic: Materials Science
Published: 4/22/2009
Authors: Joy P Dunkers, Juan M. Taboas
Abstract: For mechanotransduction studies, extracellular matrix proteins should be robustly attached to the surface to prevent cell delamination during deformation. The standard surface modification method is to incubate proteins on an oxidized, flexible surfa ...

297. Modelling of Thermodynamics and Diffusion in Multicomponent Systems
Topic: Materials Science
Published: 4/1/2009
Authors: Ursula R Kattner, Carelyn E Campbell
Abstract: The availability of reliable materials data is key to the successful design of materials and manufacturing processes.  Commercial alloys rarely consist of only two or three elements, but rather may contain a large number of elements for which the nee ...

298. Hydrogen-Steel Compatibility Research at NIST-Boulder
Topic: Materials Science
Published: 3/30/2009
Author: Thomas Allen Siewert
Abstract: The NIST Materials Reliability Division is outfitting a high pressure (100 MPa) hydrogen testing facility to collect mechanical and thermodynamic property data on various candidate structural materials, and is developing data on nondestructive sens ...

299. Dielectric Spectroscopy Investigation of Relaxation in C60-Polyisoprene Nanocomposites
Topic: Materials Science
Published: 3/23/2009
Authors: Yifu Ding, Sebastian Pawlus, Alexei Sokolov, Jack F Douglas, Alamgir Karim, Christopher L Soles
Abstract: We investigate the influence of adding C60 nanoparticles on the dielectric relaxation spectra of both unentangled and entangled polyisoprene (PIP). Relaxation modes corresponding to both segmental and chain relaxation were analyzed over a broad tempe ...

300. Examination of thin film modulus for a series of poly(alkyl methacrylates)
Topic: Materials Science
Published: 3/22/2009
Authors: Jessica M. Torres, Christopher M Stafford, Bryan D. Vogt
Abstract: In this work, the modulus of polymer thin films for a homologous series of poly(n-alkyl methacrylate)s will be discussed. In particular, the impact of the degree of undercooling from bulk Tg on the deviations will be explored as Tg is significantly ...

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