Latest Strengthening mechanisms of materials Stories
Materials scientists from Case Western Reserve University and the Institute of Solid State Research in Jlich, Germany have produced particularly clear changes in the atomic structure of sapphire following deformation at high temperatures. Peering through an electron microscope down to a level where a human hair would seem as wide as a washer and dryer set, they were able to quantify deviations from the regular columns of aluminum and oxygen atoms - the stuff of perfect sapphire crystals. The...
By Das, S Singh, S B; Mohanty, O N; Bhadeshia, H K D H The basic science behind bake hardening steels is well understood in terms of the interactions between interstitial solutes and dislocations. However, the manufacture of such alloys involves a variety of other variables, the interactions between which are influential in controlling the extent of hardening. In the present work, a model which includes the chemical composition of the steel, the strain before aging and the annealing and...
- A Roman unit of weight, 1⁄1728 of a pound.
- A weight of four grains used in weighing gold and precious stones; a carat.
- In anatomy, a formation suggesting a husk or pod.
- The lowest unit in the Roman coinage, the twenty-fourth part of a solidus.
- A coin of base silver of the Gothic and Lombard kings of Italy.