鋁合金的擠壓成型從19世紀期間發展至今已趨於成熟，成型的過程中主要受到幾種參數影響了最終產品的性質，包含了擠壓比、擠製溫度及擠製速率等等。至今為止，許多學者針對上述參數進行相關之研究，但鮮少有學者比較不同的截面形狀對於型材之影響。因此，本研究將於固定上述的擠製條件下，討論不同截面形狀的棒材及板材對於型材微結構及機械性質之影響。
本研究利用泰勒模型模擬及EBSD觀察兩種型材之織構演化，並利用EBSD觀察兩種型材之微結構，比較擠壓形狀對於型材組織之影響，最後分析各個狀態下的主要析出相及尖峰時效下之機械性質。
根據實驗結果，於不同型材及不同的位置因溫度、應變及應變速率而具有不同的退火驅動力，造成棒材的中心擠製後由回復主導，板材的中心由再結晶主導，而邊緣均屬於退火後期的階段。
機械強度的結果顯示兩種型材在尖峰時效狀態下具有相近的拉伸強度，從金屬的強化機制方面討論，兩種型材具有相近的優選方位、退火狀態、化學成分、晶粒尺寸及尖峰時效的析出分布情形，因此具有相近的機械強度。

Until now the major process parameters of extruded aluminum alloys have been investigated, such as temperature, extrusion ratio and extrusion rate. However, a few studies focused on the influence of shape. Therefore, in the study, we investigated on the effect of extruded shape on the microstructure and mechanical properties of extruded AA6061 rod and plate.
The texture measurements were carried out by electron backscatter diffraction (EBSD) and focus on the plane normal parallel to the extrusion direction (ED) and on the cross-section of the specimen vertical to the ED called the transverse direction (TD). The mechanical properties were measured by micro-hardness test and tensile test, in order to understand the aging behavior.
The results show that the anneal process is dominated by dynamic recovery at the rod center and dynamic recrystallization at the plate center. The mechanical properties show that they will have similar tensile strength at their peak aging condition, although the aging time of the maximal peak intensity is different for the two profiles of the rod and plate.

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