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
Guo Lab Shows Potential of RNA as Heat-resistant Polymer Material for Nanoarchitectures April 23rd, 2014
Nanomaterial Outsmarts Ions April 22nd, 2014
Thinnest feasible membrane produced April 17th, 2014
INSCX™ exchange to present Exchange trade reporting mechanism for engineered nanomaterials (NMs) to UK regulation agencies, insurers and upstream/downstream users April 17th, 2014
Characterizing inkjet inks: Malvern Instruments presents new rheological research April 23rd, 2014
NanoSafe, Inc. announces the addition of the Labconco Protector® Glove Box to its NanoSafe Tested™ registry April 23rd, 2014
Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014
High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014