INFLUENCE OF DISTRIBUTION OF OXIDE CONTAMINATIONS ON MECHANICAL PROPERTIES OF RECYCLED MAGNESIUM ALLOY BY SOLID-STATE RECYCLING

摘要

Mechanical properties and deformation characteristics of the recycled specimen by solid-state recycling have been investigated. At room temperature, the recycled specimen with high extrusion ratio exhibited much higher yield stress and ultimate tensile strength than those of the reference specimen. The higher yield stress and higher tensile strength of the recycled specimen were likely attributed to the fine-grain strengthening and the particle-dispersion strengthening. On the other hand, at elevated temperature, the elongation to failure of the recycled specimen was lower than that of the reference specimen, except at 753 K with 3.3×10~(-4) s~(-1). Oxide contaminants in the recycled specimen were responsible for the reduction in elongation to failure. The cavity formation due to the oxide contaminants was analyzed using existing theoretical models, and experimental results were compared with analytical results.