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Latest Fracture mechanics Stories

2013-11-18 10:32:56

From the production of tougher, more durable smart phones and other electronic devices, to a wider variety of longer lasting biomedical implants, bulk metallic glasses are poised to be  mainstay materials for the 21st Century. Featuring a non-crystalline amorphous structure, bulk metallic glasses can be as strong or even stronger than steel, as malleable as plastics,  conduct electricity and resist corrosion. These materials would seem to have it all save for one problem: they are often...

2013-10-02 10:58:48

If we're to meet a goal set by the U.S. Environmental Protection Agency's Renewable Fuels Standard to use 36 billion gallons per year of biofuels—mostly ethanol—the nation must expand its infrastructure for transporting and storing ethanol. Currently, ethanol is transported via trucks, trains, and barges. For the large volumes required in the future, transportation by pipeline is considered to be the most efficient method to get it to customers. The integrity and safety of pipelines...

2013-05-06 08:20:59

PITTSBURGH, May 6, 2013 /PRNewswire/ -- Warren M. Garrison Jr., a professor of materials science and engineering at Carnegie Mellon University, has developed a new ultra-strength steel of high fracture toughness that is significantly less expensive to manufacture than existing products. (Logo: http://photos.prnewswire.com/prnh/20020422/CMULOGO ) The new steel contains no cobalt and only a relatively small amount of nickel and therefore is much less expensive than other ultra-high...

2011-10-20 12:20:00

Joseph Federico, VP of NJ Micro Electronic Testing, Clifton, NJ, Announced that the Laboratory is Expanding its Laboratory Testing Services to Include Stress Testing for a Spectrum of Materials and Structures. Clifton, NJ (PRWEB) October 20, 2011 Joseph Federico, NJ Micro Electronic Testing Vice President, announces the expansion of its laboratory testing services to include stress testing of a spectrum of materials and structures subjected to a dynamic force or load....

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2011-01-13 09:06:15

Amorphous palladium-based alloy demonstrates unprecedented level of combined toughness and strength; could be of use in biomedical implants Glass is inherently strong, but when it cracks or otherwise fails, it proves brittle, shattering almost immediately. Steel and other metal alloys tend to be tough"”they resist shattering"”but are also relatively weak; they permanently deform and fail easily. The ideal material, says Marios Demetriou, a senior research fellow at the California...

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2010-03-05 12:36:30

In research published in the March 4 issue of the journal Nature, Northeastern University physicists have pioneered the development of large-scale computer simulations to assess how cracks form and proliferate in materials ranging from steel and glass to nanostructures and human bones. For years, scientists have tried to understand the propagation of cracks and how they affect the materials in which they form, said Alain Karma, distinguished physics professor and lead investigator on the...

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2009-03-24 09:52:28

Metallic glass that's stronger and lasts longer The normal structure of metals is crystalline. Glass, on the other hand, is amorphous. But it's possible to make amorphous forms of metal, metallic glasses, which can be remarkably strong, having many properties equal to or better than their crystalline metal cousins. The catch is that bulk metallic glasses are highly susceptible to fatigue, a severe problem for their use as structural materials. Now researchers at the U.S. Department of...

2008-12-24 09:50:37

Researchers at the National Institute of Standards and Technology (NIST) have developed a method to measure the toughness"”the resistance to fracture"”of the thin insulating films that play a critical role in high-performance integrated circuits. The new technique could help improve the reliability and manufacturability of ICs and, better yet, it's one that state-of-the-art microelectronics manufacturers can use with equipment they already own.At issue is the mechanical strength...

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2008-11-21 10:38:38

The Naval Research Laboratory (NRL) is part of an international team of scientists that is learning more about how cracks form in brittle materials. The team used both computer modeling and experimentation to investigate how cracks grow at low speeds in silicon. This information has potential applications in the development of a variety of materials ranging from armor to machine parts. The research team published their findings in the October 30th edition of Nature. Using the computer...

2008-10-14 12:00:23

Research and Markets (http://www.researchandmarkets.com/research/22020d/weld_cracking_in_f) has announced the addition of Woodhead Publishing Ltd's new book "Weld Cracking in Ferrous Alloys" to their offering. Weld cracks are unacceptable defects that can compromise the integrity of welded structures. Weld cracking can lead to structural failures which at best will require remedial action and at worst can lead to loss of life.Weld cracking in ferrous alloys reviews the latest...