az31 sheet, wire, circle, pipe
This magnesium alloy is a wrought alloy anisotropic.
After pressure casting (SC) and severe plastic deformation (SPD) by hot rolling and equal channel angular pressing microstructure is formed with a reduced average grain size.
Discovered that at a temperature of 4.2−25°K the plastic deformation becomes unstable (abrupt). With the grain size, the speed of strain hardening of the metal is reduced, however, its ductility (strain to fracture) increases due to texture. Speed sensitivity to stress at T ≤ 100°K does not depend on the microstructure and is determined by the intersection of dislocations of the «forest.» With increasing temperature in the range 150−295°To speed the sensitivity is increased owing to activation of dynamic recovery and strengthen the role of diffusion processes during plastic deformation of Micrograin materials.
The alloy was irradiated ion beam with the energy density of 3.4 j/cm2, in conditions of dry friction. Surface morphology, composition and structure of the irradiated magnesium alloy was investigated by electron microprobe (EPM) and x-ray diffraction (XRD). The results showed that irradiation of the MIP leads to increase of microhardness of the surface and reduction of friction coefficient and wear rate. When processing the MIP was obtained by the field enhanced diffusion of oxygen, resulting in compaction of the surface layer and a protective film on the surface of the wear track.
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