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Tensile and compressive behavior of tungsten, molybdenum, tantalum and niobium at the nanoscale
In situ nanomechanical tests are carried out to investigate the tensile and compressive behavior of -oriented body-centered cubic (bcc) metals W, Mo, Ta and Nb with nanometer dimensions. We find that… Expand
Deformation mechanisms in nanotwinned metal nanopillars.
- D. Jang, Xiaoyan Li, Huajian Gao, J. Greer
- Materials Science, Medicine
- Nature nanotechnology
- 1 September 2012
Nanotwinned metals are attractive in many applications because they simultaneously demonstrate high strength and high ductility, characteristics that are usually thought to be mutually exclusive.… Expand
Transition from a strong-yet-brittle to a stronger-and-ductile state by size reduction of metallic glasses.
Amorphous metallic alloys, or metallic glasses, are lucrative engineering materials owing to their superior mechanical properties such as high strength and large elastic strain. However, their main… Expand
Size-induced weakening and grain boundary-assisted deformation in 60 nm grained Ni nanopillars
Nanocrystalline metals generally exhibit high strengths and good fatigue resistance Their strengthening scales with the inverse of grain size through square root dependence down to grain sizes of… Expand
Crystallographic orientation and size dependence of tension–compression asymmetry in molybdenum nano-pillars
Uniaxial tension and compression experiments on [0 0 1] and [0 1 1] oriented molybdenum nano-pillars exhibit tension–compression asymmetry, a difference in attained stresses in compression vs.… Expand
Fabrication and deformation of three-dimensional hollow ceramic nanostructures.
Creating lightweight, mechanically robust materials has long been an engineering pursuit. Many siliceous skeleton species--such as diatoms, sea sponges and radiolarians--have remarkably high… Expand
Insight into the deformation behavior of niobium single crystals under uniaxial compression and tension at the nanoscale
Size-dependent deformation behavior of niobium single-crystalline samples 200–900 nm in diameter is investigated by in situ compression and tension testing. Stress–strain curves in compression show… Expand
Materials Science and Engineering A
Nanoindentation analysis is severely affected by time-dependent deformation (viscoplasticity) in mate- rials and needs to be understood. Hence, in this work we carefully examine the viscoplasticity… Expand
Nanometallic glasses: size reduction brings ductility, surface state drives its extent.
- D. Chen, D. Jang, K. Guan, Q. An, W. Goddard, J. Greer
- Materials Science, Medicine
- Nano letters
- 30 August 2013
We report tensile experiments on Ni80P20 metallic glass samples fabricated via a templated electroplating process and via focused ion beam milling, which differed only in their surface energy states:… Expand
Influence of homogeneous interfaces on the strength of 500 nm diameter Cu nanopillars.
Interfaces play an important role in crystalline plasticity as they affect strength and often serve as obstacles to dislocation motion. Here we investigate effects of grain and nanotwin boundaries on… Expand