アルミニウムおよびその合金におよぼすジルコニウムの効果(第3報)

ジルコニウムによるアルミニウムの再結晶温度上昇の機構

抄録

Experiments have been made to examine the mechanism of recrystallization temperature rise of aluminium when zirconium is added to it.
The following results obtained:
(1) Zr in the aluminium is easily retained in solid solution by cooling rate in solidification and ZrAl₃ precipitated from solid solution by preheating is far finer than in solidification, and its precipitation from solid solution is comparatively rapid.
(2) Effect of Zr on recrystallization temperature rise of aluminium appears to be by finer ZrAl₃ precipitated from solid solution. This fine ZrAl₃ delays very remarkably recrystallization of aluminium, while coarse ZrAl₃ precipitated in solidification or solid solution structure has a minor effect on the delay and temperature rise.