本研究是將6061(鋁鎂矽)鋁合金先熱處理成O料(400℃-2小時)和固溶料(530℃-4小時)，再進行等徑轉角擠型(ECAE)。使用通道交角Φ=120°、外側弧角Ψ= 0°的模子，以路徑Bc擠製。O料擠製8道(擠製溫度為室溫)，固溶料擠製6道(擠製溫度為150℃和175℃)，擠製後再進行時效處理。
O料經時效處理，硬度變化不大，沒有明顯的析出反應。經過ECAE擠製後，產生大量的次晶粒和差排，所以硬度增加2倍。而O料在ECAE之後的低溫時效處理，硬度會略增12%，主要是由ECAE所產生的差排，有助於進一步的析出反應。
固溶料進行時效處理，由於析出物析出，造成硬度大幅增加。固溶料經過ECAE擠製後，產生了大量次晶粒和差排，以及許多細小的析出物，使得硬度遠遠高於O料和T651。固溶料經ECAE擠製後再進行低溫時效(100℃-48小時)，YS可高達357MPa，UTS達378MPa，與傳統T651處理相較，YS提高了81MPa，UTS提高了68MPa，而Elongation僅下降4%。

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目錄
一、前言…………………………………………………………….1
二、文獻回顧……………………………………………………….2
2-1 等徑轉角擠型(ECAE) ………………………………………2
2-2 6061鋁合金之熱處理……………………………………...3
2-3 6061鋁合金析出硬化……………………………………..4
2-4 機械性質…………………………………………………….6
三、研究目的………………………………………………………8
四、實驗過程.……………………………………………………...9
4-1 原始材料…………………………………………………….9
4-2 實驗設備…………………………………………………….9
4-3 實驗方法……………………………………………………10
4-3-1 ECAE擠製……………………………………………..10
4-3-2 時效處理………………………………………………10
4-3-3 微結構分析……………………………………………10
4-3-3-1 金相觀察…………………………………………10
4-3-3-2 TEM分析…………………………………………11
4-3-4 機械性質………………………………………………11
4-3-4-1 微硬度試驗……………………………………….11
4-3-4-2 拉伸試驗…………………………………………11
五、實驗結果……………………………………………………..12
5-1 原始材料觀察……………………………………………..12
5-2 微結構……………………………………………………..12
5-3 微硬度……………………………………………………..13
5-4 拉伸變形………………………………………………….15
六、討論………………………………………………………….16
七、結論………………………………………………………….18
八、參考文獻…………………………………………………….19

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