5083合金の熱間加工性に及ぼす加工前均質化熱処理条件の影響

抄録

Hot torsion tests were conducted on the 5083 aluminum alloy having cast structure under the conditions of shear strain rate range from 0.1 to 75 sec^-1 and temperature range from 400°C to 500°C. The two stages solution treated materials are superior in hot workability than one stage treated ones. It is possible by electron microprobe analyses to deduce the composition and relative amount of constituent elements of the precipitated intermetallic compounds which decrease the ductility of the alloy. These intermetallic compounds are composed of such elements as Fe, Mn, Cr and Si.