고순도 Aluminum 에 있어서 가공경화가 활성화 Energy 에 미치는 영향 = Effect of Plastic Deformation on Activation Energy of Recovery in Pure Aluminum

국문 초록 (Abstract)

99.9% 純度의 aluminum 試片을 加工硬化度에 따라서 恢復에 必要한 活成化 energy를 測定해 보았다. 4.75 ㎜ 直經의 aluminum捧을 10%, 20% 및 29%로 冷間壓縮加工을 實施하여 最終길이가 均一한 6 ㎜로 되게끔 하였다. 10% 및 29% 試片에 對하여 240∼330℃ 溫度區間에서 한時間 간격으로 isochronal annealing을 實施한 hardness data로부터 再結晶溫度가 304℃ 및 285℃ 임을 알 수 있었다. 한편 isochronal annealing을 290℃, 310℃, 및 330℃에서 實施한 結果 恢復에 必要한 活性化 energy는 각각 29,600㎈/㏖, 25,200㎈/㏖ 및 25,200㎈/㏖을 얻을 수 있었다.

다국어 초록 (Multilingual Abstract)

The effect of plastic deformation on the activation energy of recovery and recrystalization temperature of 99.9% purity polycrystalline Aluminum was investigated.
The 10%, 20% and 29% cold compressed aluminum specimen were prepared from 4.75 ㎜ diameter cold drawn rod. From the hardness data obtained by isochronal annealing of one hour between the temperature range of 240℃-330℃ under hydrogen atmosphere, the recrystallization temperatures for 10% and 29% cold compressed were measured to be 304℃ and 285℃ respectively. On the other hand, from the hardness data obtained by isothermal annealing at the temperature range of 290℃-330℃, the activation energy of recovery for 10%, 20% and 29% cold compressed were deduced as 29,600, 25,200 and 22,500 ㎈/㏖ respectively.
The activation energy of recovery can be expressible in linear equation in terms of the stored energy of plastic deformation.