U.S. Navy unveils high-speed rail gun

This video shows a U.S. Navy demonstration of a railgun. A railgun is an electrically powered electromagnetic projectile launcher. It is made of a pair of parallel conducting rails, along which a sliding armature is accelerated by the electromagnetic effects of a current that flows down one rail, into the armature, and then back along […]

Iron-manganese-silicon shape-memory alloys designed to reinforce concrete

The Engineering Structures Laboratory of the Swiss Federal Laboratories for Materials Science and Technology (EMPA), Switzerland, has reportedly developed an iron-based shape memory alloy for reinforcing concrete that has a lower melting point and is lower in cost than nickel-titanium SMAs.