Home > News > Nanobubbles cause metal fatigue
May 15th, 2005
Nanobubbles cause metal fatigue
Metals with nanoscale grain sizes can be stronger than ordinary metals, but they may also be highly susceptible to fatigue: the gradual growth of cracks under repeated cycles of stress and release. Computer simulations of the atomic-scale processes involved in the cracking of a nanocrystalline metal have now helped to clarify the reasons for this Achilles' heel.
The key problem that Diana Farkas and her colleagues at Virginia Polytechnic Institute and State University in Blacksburg have overcome in conducting their investigation is how to bridge the different scales at which the issue of cracking must be considered. Although the basic process by which a crack propagates through a metal involves sliding of individual planes of atoms in the crystalline material, the big picture becomes apparent only when one draws back to the scale of many tens of nanometres — which encompasses enormous numbers of atoms.
Virginia Polytechnic Institute
Consistent Scalable Functionalised Graphene Capacity March 5th, 2015
The taming of magnetic vortices: Unified theory for skyrmion-materials March 3rd, 2015
Breakthrough in OLED technology March 2nd, 2015
Moving molecule writes letters: Caging of molecules allows investigation of equilibrium thermodynamics February 27th, 2015
MIG Takes a Roll-Up-Your-Sleeves Approach with Revamped MEMS/Sensors Technical Event -- MIG welcomes technologists to MEMS Technical Congress, emphasizes working groups and breakout sessions on emerging MEMS & sensors, tech transfer and integration March 6th, 2015
Phenom-World announces the Phenom XL, world’s fastest desktop SEM to handle large samples March 6th, 2015
Air Bearing Stage / Systems Introduced by PI at Photonics West March 6th, 2015
Get ready for NanoDays! March 5th, 2015