Shear Assisted Processing and Extrusion (ShAPE) enables the extrusion of many alloys with enhanced properties. In this study, ShAPE was used to extrude tubes of aluminum alloy 6063 measuring 12 mm in diameter at extrusion speeds up to 3.8 m/min, an increase of 10 times over what has previously been reported for ShAPE. Increasing the extrusion speed from 0.7 to 3.8 m/min resulted in using 68% less process energy at steady state without any loss in mechanical properties.

As-extruded tubes had ultimate tensile strengths on par with conventional T5 extrusions and double the elongation at break. ShAPE extruded tubes that underwent a T5 heat treatment had yield and ultimate strengths of 198 and 234 MPa, respectively, which is ∼30% higher than standard T5 material and comparable to T6 properties.

Microstructural analyses were performed on as-extruded and T5 treated tubes. Grain refinement below 20 μm was identified, with no detectable growth of macroscale Mg₂Si strengthening precipitates. Nanoscale β″ was not observed in the as-extruded materials but was prominent after T5 heat treatment suggesting that β″ strengthening precipitates were solutionized in situ during the ShAPE process. The ability to perform solution heat treating in situ, rather than post-extrusion, eliminates an energy intensive process step and is applicable to a wide variety of alloys.

剪切辅助加工和挤出 (ShAPE) 能够挤出许多具有增强性能的合金。在这项研究中，使用 ShAPE 以高达 3.8 m/min 的挤压速度挤压直径为 12 mm 的铝合金 6063 管，比之前报道的 ShaAPE 增加了 10 倍。将挤出速度从 ​​0.7 m/min 提高到 3.8 m/min，在稳定状态下使用的工艺能量减少了 68%，而机械性能没有任何损失。

挤压后的管材具有与传统 T5 挤压件相当的极限拉伸强度和两倍的断裂伸长率。经过 T5 热处理的 ShaAPE 挤压管的屈服强度和极限强度分别为 198 MPa 和 234 MPa，比标准 T5 材料高约 30%，与 T6 性能相当。

对挤压态和 T5 处理过的管进行显微结构分析。确定了低于 20 μm 的晶粒细化，没有可检测到的宏观 Mg ₂ Si 强化沉淀物的生长。在挤压态材料中未观察到纳米级 β”，但在 T5 热处理后很明显，这表明 β” 强化析出物在 ShAPE 过程中原位固溶。能够在原位进行固溶热处理，而不是后挤压，消除了能源密集型工艺步骤，适用于各种合金。