Nanotechnology Now |
Home > Press > Researchers provide new insight into how metals fail
 |
| Warner |
Abstract:
The eventual failure of metals, such as the aluminum in ships and airplanes, can often be blamed on breaks, or voids, in the material's atomic lattice. They're at first invisible, only microns in size, but once enough of them link up, the metal eventually splits apart.
Researchers provide new insight into how metals fail
Ithaca, NY | Posted on January 23rd, 2012Cornell engineers, trying to better understand this process, have discovered that nanoscale voids behave differently than the larger ones that are hundreds of thousands of atoms in scale, studied through traditional physics. This insight could lead to improved ability to predict how cracks grow in metals, and how to engineer better materials.
Graduate student Linh Nguyen and Derek Warner, assistant professor of civil and environmental engineering, reported their findings in the journal Physical Review Letters, Jan. 20. Using new atomistic simulation techniques, they concluded that the smallest voids in these materials, those having nanometer dimensions, don't contribute in the same way as microscale voids do in material failure at ordinary room temperatures and pressures.
When metals fail, a physical phenomenon known as plasticity often occurs, permanently deforming, or changing the shape of the material. Previously, it was theorized that both nanometer and microscale voids grow via plasticity as the material fails, but the new research says otherwise.
"While this was something amenable to study with traditional atomistic modeling approaches, the interpretation of previous results was difficult due to a longstanding challenge of time scaling," Warner said. "We've come up with a technique to better address that."
Nguyen and Warner's work is supported by the Office of Naval Research, which has particular interest in the use of aluminum and other lightweight, durable metals in high-performance ship structures.
####
For more information, please click here
Contacts:
Media Contact:
John Carberry
(607) 255-5353
Cornell Chronicle:
Anne Ju
(607) 255-9735
Copyright © Cornell University
If you have a comment, please Contact us.Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
Bookmark:
| Related News Press |
News and information
Beautiful "flowers" self-assemble in a beaker: Elaborate nanostructures blossom from a chemical reaction perfected at Harvard May 17th, 2013
Moth-Inspired Nanostructures Take the Color Out of Thin Films May 17th, 2013
NIA Public Briefing: Nanotechnology and the Council of Europe May 17th, 2013
Marine/Watercraft
Improving Energy Storage: Neutron Scattering Technique Provides New Data on Adsorption of Ions in Microporous Materials February 28th, 2013
Southampton scientist develops strongest, lightest glass nanofibres in the world January 10th, 2013
Research and Markets: The Global Nanotechnology and Nanomaterials Industry 2013 Report: Stage of Development, Global Activity and Market Opportunities December 16th, 2012
mPhase to Release Video of New Product October 25th, 2012
Discoveries
Beautiful "flowers" self-assemble in a beaker: Elaborate nanostructures blossom from a chemical reaction perfected at Harvard May 17th, 2013
Moth-Inspired Nanostructures Take the Color Out of Thin Films May 17th, 2013
Scientists capture first direct proof of Hofstadter butterfly effect May 17th, 2013
Materials
Advancements and developments of solid-state nanopores sensors May 16th, 2013
Physicists discover a new kind of friction: Friction in the nano-world May 16th, 2013
Squishy hydrogels may be the ticket for studying biological effects of nanoparticles May 15th, 2013
Announcements
Moth-Inspired Nanostructures Take the Color Out of Thin Films May 17th, 2013
NIA Public Briefing: Nanotechnology and the Council of Europe May 17th, 2013
Scientists capture first direct proof of Hofstadter butterfly effect May 17th, 2013
Military
Using clay to grow bone: Researchers use synthetic silicate to stimulate stem cells into bone cells May 15th, 2013
Improved material for ‘laser welding’ of tissue in intestinal surgery May 8th, 2013
Aerospace/Space
Moth-Inspired Nanostructures Take the Color Out of Thin Films May 17th, 2013
UC Santa Barbara History Professor's Book Elucidates, Celebrates ‘Visioneers' May 14th, 2013
Over 20 Exhibitors To Present At International Space Development Conference May 13th, 2013
 |
||
 |
||
| The latest news from around the world, FREE | ||
 |
||
|
|
||
| Premium Products | ||
 |
||
|
Only the news you want to read!
Learn More |
||
 |
||
|
University Technology Transfer & Patents
Learn More |
||
 |
||
|
Full-service, expert consulting
Learn More |
||
|
|
||
abbigliamento uomo
Computer Accessories
| © Copyright 1999-2013 7th Wave, Inc. All Rights Reserved | PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE |