Abstract: A strengthened Mg based alloy comprising Mg as a base element and at least two microalloying elements. A microstructure having at least one of dislocations, stacking faults, coherency strains, grain boundaries and dislocation domains decorated by segregation of microalloying elements. One of the microalloying elements is a large atom element having an atomic size larger than the atomic size of a Mg atom and another of the microalloying elements is a small atom element having an atomic size smaller than the atomic size of the Mg atom. The microstructure includes an absence of continuous films of grain boundary intermetallic compounds.

Abstract: This method of manufacturing laminated skis by the so-called wet process consists in incorporating at least one metal blade or a sheet of high-strength fibres among the strata, the width of the blade or sheet being inferior to that of the ski, and the width of its ends decreases gradually to a point in the transitional area between the heel and body and also in the transitional area between the body and the tip of the ski.

Abstract: A ski has a polyurethane core cut into three side-by-side sections, sandwiched between an upper and a running sole with interposed layers of stratified glass fibers in an epoxy resin. Solely the central part of the core is encased in and reinforced by a further layer of glass fibers in an epoxy resin, including an inner stratum of random fibers and an outer stratum of fibers extending along the entire length of said central part.