𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Tensile and compressive behavior of gold and molybdenum single crystals at the nano-scale

✍ Scribed by Ju-Young Kim; Julia R. Greer

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
900 KB
Volume
57
Category
Article
ISSN
1359-6454

No coin nor oath required. For personal study only.

✦ Synopsis

In situ mechanical tests were carried out to measure the tensile behavior of single-crystalline face-centered cubic (fcc) gold (Au) and body-centered cubic (bcc) molybdenum (Mo) nano-pillars with diameters between 250 and 1 lm, and to compare this with the compression results of these materials at the equivalent sizes. In Au, we observed similar tensile and compressive flow stresses at $10% strain although strain-hardening in tension is somewhat more pronounced than it is in compression. In Mo, the amount of strain-hardening in tension is significantly lower than that in compression, leading to a distinct tension-compression asymmetry in the flow stress at $5% strain. The dissimilarities between tensile and compressive behavior in both crystals are discussed in terms of sample geometry constraints and dislocation behavior in bcc crystals.

πŸ“œ SIMILAR VOLUMES

Indentation and scratch behavior of nano
Indentation and scratch behavior of nano-SiO2/polycarbonate composite coating at the micro/nano-scale
✍ Z.Z. Wang; P. Gu; Z. Zhang πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 English βš– 812 KB

The mechanical and tribological performances of polycarbonate film and nano-SiO 2 /polycarbonate composite coating are studied with micro/nano-scale indentation and scratch tests using Hysitron Tri-boIndenter. The experimental results show that the hardness and stiffness are increased apparently aft

The influence of different cutting speed
The influence of different cutting speeds on the cutting force and strain–stress behaviors of single crystal copper during nano-scale orthogonal cutting
✍ Zone-Ching Lin; Jen-Ching Huang πŸ“‚ Article πŸ“… 2008 πŸ› Elsevier Science 🌐 English βš– 981 KB

This paper uses a method that combines molecular dynamics with finite element deformation model (MDFM) to calculate the stress and strain of single crystal copper that occur during nano-scale orthogonal cutting. Using the MDFM model, the phenomenon of residual strain, residual stress on the machined