68,853 research outputs found
Spartan Daily, December 13, 1939
Volume 28, Issue 57https://scholarworks.sjsu.edu/spartandaily/3003/thumbnail.jp
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Multi-Material Ultrasonic Consolidation
Ultrasonic consolidation (UC) is a recently developed direct metal solid freeform
fabrication process. While the process has been well-demonstrated for part fabrication in Al alloy
3003 H18, including with intricate cooling channels, some of the potential strengths of the
process have not been fully exploited. One of them is its flexibility with build materials and the
other is its suitability for fabrication of multi-material and functionally graded material parts with
enhanced functional or mechanical properties. Capitalizing on these capabilities is critical for
broadening the application range and commercial utilization of the process. In the current work,
UC was used to investigate ultrasonic bonding of a broad range of engineering materials, which
included stainless steels, Ni-base alloys, brass, Al alloys, and Al alloy composites. UC multimaterial part fabrication was examined using Al alloy 3003 as the bulk part material and the
above mentioned materials as performance enhancement materials. Studies were focused on
microstructural aspects to evaluate interface characteristics between dissimilar material layers.
The results showed that most of these materials can be successfully bonded to Al alloy 3003 and
vice versa using the ultrasonic consolidation process. Bond formation and interface
characteristics between various material combinations are discussed based on oxide layer
characteristics, material properties, and others.Mechanical Engineerin
Educating English Language Learners in Dexter
This case was commissioned by Public Education Network (PEN) and prepared by the Rennie Center for Education Research and Policy. This case was designed for use at PEN's 2006 annual conference, and focuses on meeting the educational needs of English Language Learners (ELLs) in a fictitious community
Remarks on the Spectral Properties of Tight Binding and Kronig-Penney Models with Substitution Sequences
We comment on some recent investigations on the electronic properties of
models associated to the Thue-Morse chain and point out that their conclusions
are in contradiction with rigorously proven theorems and indicate some of the
sources of these misinterpretations. We briefly review and explain the current
status of mathematical results in this field and discuss some conjectures and
open problems.Comment: 15,CPT-94/P.3003,tex,
Alien Registration- Madden, P. W. (Old Orchard Beach, York County)
https://digitalmaine.com/alien_docs/3003/thumbnail.jp
The Evening Herald (Albuquerque, N.M.), 07-15-1920
https://digitalrepository.unm.edu/abq_eh_news/3003/thumbnail.jp
Tucker v. State Appellant\u27s Brief Dckt. 42448
https://digitalcommons.law.uidaho.edu/not_reported/3003/thumbnail.jp
On the Origin of Charging Damage during Etching of Antenna Structures
Monte Carlo simulations of charging and profile evolution in patterned antenna structures during etching in high-density plasmas reveal a rapid change in the potential of the lines at end point, which causes a surge in electron tunneling through thin gate oxides and possibly charging damage. The condition of the substrate (grounded vs. floating) determines the magnitude of the surge and whether it will be followed by a steady-state current until all lines of the pattern become disconnected. A reduction in damage is possible by controlling the substrate condition, which may be assessed through notching experiments
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