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Topic Area: Metals

Displaying records 31 to 40 of 59 records.
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31. High Strain Rate Tissue Simulant Measurements Using digital Image Correlation
Topic: Metals
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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902304

32. A reassessment of the Al-Fe system using a four sublattice model for the DO 3 ordering
Topic: Metals
Published: 4/9/2009
Authors: Ursula R Kattner, Bo Sundman, Ikuo Ohnuma, N Dupin, S Fries
Abstract: The Al-Fe system is important in many alloys and the new interest in iron aluminides makes it necessary to improve the modelling of the different ordered forms of the A2 lattice in this system. This has now been done using a 4 sublattice model based ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854460

33. Thermopower of Co-doped FeSe0.82
Topic: Metals
Published: 4/1/2009
Authors: Evan L. Thomas, Winnie K Wong-Ng, Daniel P. Phelan
Abstract: The effect of cobalt doping (0.05 ≤ x ≤ 0.50) on the thermopower of the newly discovered superconductor FeSe0.82 is investigated through electrical and thermal transport measurements. Our results point to the destruction of superconducti ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854463

34. Finite-element analysis and experimental investigation of probe shape effect on initial plastic yield
Topic: Metals
Published: 3/3/2009
Authors: Li Ma, Dylan Morris, Stefhanni Jennerjohn, David Bahr, Lyle E Levine
Abstract: Sudden displacement excursions during load-controlled nanoindentation of relatively dislocation-free surfaces of metals are frequently associated with dislocation nucleation, multiplication, and propagation. Insight into the nanomechanical origins of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854131

35. 400-Fold Reduction in Saturation Field by Interlayering
Topic: Metals
Published: 1/13/2009
Authors: William F. Egelhoff Jr., John E Bonevich, Philip Pong, John Unguris, Robert D McMichael, Gery R Stafford, Carlos R Beauchamp
Abstract: The buildup of stress with increasing thickness of magnetic thin films is a common phenomenon that often induces undesirable saturation fields that can convert an otherwise magnetically soft film into a magnetically hard one. We have found that by i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854046

36. Phase Field Approach to Heterogeneous Crystal Nucleation in Alloys
Topic: Metals
Published: 1/11/2009
Authors: James A Warren, T Pusztai, L Kornyei, L Granasy
Abstract: We extend the phase field model of heterogeneous crystal nucleation developed recently [L. Granasy, T. Pusztai, D. Saylor, and J. A. Warren, Phys. Rev. Lett. 98, 035703 (2007)] to binary alloys. Three approaches are considered to incorporate foreign ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900120

37. ADVANCED NON-DESTRUCTIVE HYDROGEN SENSORS TO PREVENT MATERIAL DEGRADATION FROM HYDROGEN DAMAGE
Topic: Metals
Published: 1/5/2009
Authors: Angelique N Lasseigne, Kamalu Koenig, David Olson, Brajendra Mishra, Joshua Jackson, Thomas Allen Siewert, Joseph David McColskey
Abstract: New higher strength pipeline steels (X100 and X120) exhibit lower tolerance for hydrogen (diffusible and formed hydrides) before significant degradation or failure occurs. It is essential to have advanced sensors to monitor the hydrogen content and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854112

38. Instrumented Impact Test: Impact Machine Variables and Specimen Position
Series: NIST Interagency/Internal Report (NISTIR)
Topic: Metals
Published: 1/5/2009
Author: Christopher N McCowan
Abstract: An investigation has been conducted on the influence of impact machine variables and specimen positioning on characteristic forces and absorbed energies from instrumented Charpy tests. Brittle and ductile fracture behavior has been investigated by te ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854175

39. Instrumented Impact Tests: Effects of Machine Variables and Specimen Position
Topic: Metals
Published: 1/1/2009
Authors: Christopher N McCowan, Enrico Lucon
Abstract: An investigation has been conducted on the influence of impact machine variables and specimen positioning on characteristic forces and absorbed energies from instrumented Charpy tests. Brittle and ductile fracture behavior has been investigated by te ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854171

40. Integrating methods for phase equilibria and phase property data determination
Topic: Metals
Published: 12/29/2008
Author: Ursula R Kattner
Abstract: Integrated Computational Materials Engineering (ICME) integrates computational tools for accelerated materials development, improved optimization processes in engineering design and easier transition between design and manufacturing. Data are one of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854437



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