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首页> 外文期刊>Journal of Materials Engineering and Performance >Simulation of Aluminum Powder in Tube Compaction Using Equal Channel Angular Extrusion
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Simulation of Aluminum Powder in Tube Compaction Using Equal Channel Angular Extrusion

机译：等通道角挤压在管压实中模拟铝粉

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Aluminum powder in tube compaction with a 25 mm front plug through equal channel angular extrusion (ECAE) at room temperature was modeled using the finite element analysis package ABAQUS. The Gurson model was used in modeling this process. 2-D simulations in a 90° angle die showed better consolidation of powder near the inner edge of the die than the outer edge after one pass of ECAE but almost full densification occurs after two passes. The effect of hydrostatic pressure on densification of the powder was investigated by using two plugs varying in length dimension. The results obtained from the simulations were also compared with experiments conducted to compact aluminum powder with mean particle diameter of 45 μm. Optical microscopy, microhardness test, and density measurements confirmed the simulations. The simulations were extended to powder compaction in a 60° and 120° angle die. It was found that one pass of ECAE is sufficient to consolidate the aluminum powder completely and uniformly in a 60° angle die, whereas the material is still porous in a 120° angle die.
机译：使用有限元分析程序包ABAQUS对室温下具有25 mm前塞通过等通道角挤压（ECAE）进行管压实的铝粉进行建模。 Gurson模型用于对此过程进行建模。在90°角模具中进行的二维模拟显示，一次ECAE经过之后，模具内边缘附近的粉末固结比外边缘更好，但经过两次通过后几乎发生了完全致密化。通过使用两个长度变化的塞子研究了静水压力对粉末致密化的影响。从模拟中获得的结果也与对平均粒径为45μm的压实铝粉进行的实验进行了比较。光学显微镜，显微硬度测试和密度测量结果证实了模拟结果。模拟扩展到在60°和120°角模中进行粉末压实。已发现，一次ECAE足以在60°角模具中完全均匀地固结铝粉，而在120°角模具中材料仍然是多孔的。

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