Zn/Mg比の高いAl-Zn-Mg合金に関する研究
1974 年 24 巻 10 号 p. 458-466
詳細
1974 年 24 巻 10 号 p. 458-466
Al-Zn-Mg alloys containing high zinc contents (Zn≥8%) have not been used commercially because of their high stress-corrosion susceptibility. However, if proper methods of improving the resistance to stress-corrosion cracking can be found, they will become very usefull alloys because of their excellent hot-workability and high strength.
In the course of study on the effect of small amounts of additional elements on stress-corrosion, we found that the stress-corrosion susceptibility of these alloys remarkably improved by the addition of small amounts of Cu and Zr. On that account further studies on Al-8-15%Zn-0.5-10%Mg alloys with addition of Cu and Zr were carried out. It is shown that these alloys have high strength and excellent hot workability combined with good resistance to stress-corrosion.
