旋鍛製程 (Rotary Swaging, RS)是一種常應用於管材與棒材縮徑的加工方式，有平整性佳、進料速度快、可於常溫加工且成本低等優點。本研究第一部分為探討經旋鍛後之2024鋁管後續彎管的加工性，並比較退火熱處理與固溶熱處理對加工成形性之影響。第二部分為成形後熱處理與旋鍛效應探討，其目的為了解旋鍛製程對材料機械性質與微觀組織之影響。
　　第一部分實驗結果顯示旋鍛有細化晶粒效果且其導入之應變能使熱處理後之材料組織有晶粒成長現象。拉伸性質上顯示固溶熱處理與旋鍛加工能提升材料加工硬化率、加工硬化指數與均勻延伸率效果，適合做為加工成形之熱處理與縮徑加工方式。
　　第二部分人工時效熱處理之固溶效應方面，顯示旋鍛加工使基地內晶出相細化而達到固溶量提升效果，且材料內部差排密度、晶界密度提高與晶格缺陷的存在使人工時效析出效果優化，進而獲得較高降伏強度，相關成果對於工業上結構材應用有實質助益。

Rotary swaging is a process for precision forming of tubes or bars. 2024 tube aluminum alloy was used in this study. To investigate the applicability of rotary swaging on 2024 tube aluminum alloy, there are two objective in this study. First, to understand the formability of rotary swaged 2024 tube aluminum alloy, full annealing (O) and solution treatment (T4) were conducted. Second, we expect to attain high yield strength (YS) after forming, so the effects of rotary swaging and T6 treatment are discussed.
In the first part, results showed that the uniform elongation (UE) and strain hardening exponent (n) can be improved by T4 and rotary swaging. From the formability of view, T4 on rotary swaged 2024 tube aluminum alloy is more proper than O before plastic process.
In the second part, rotary swaging improved amount of solutes during solution treatment and the effects of artificial aging by increasing dislocation densities and grain boundaries which can accelerate diffusion of solute atoms and be nucleation sites for inhomogeneous nucleation of precipitation. Therefore, higher YS was achieved.

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