等通道彎角擠製之有限元素分析與模具製作

Finite Element Analysis and Processes of Experimental Die Set of Equal-channel Angular Extrusion

陳狄成(Dyi-Cheng Chen) ； 潘志軒(Jhih-Syuan Pan) ； 張褚峰(Chu-Fong Jhang) ； 李依如(Yi-Ju Li) ； 鄒國益(Gow-Yi Tzou)

《先進工程學刊》 4卷2期 (2009/04) Pp. 133-139

https://doi.org/10.29948/JAE.200904.0006

摘要

等通道彎角擠製為利用模具幾何形狀、材料性質與加工條件來獲得材料的剪力塑性變形。本文使用剛塑性有限元素DEFORM(上標 TM) 2D軟體研究Ti-6Al-4V鈦合金於等通道彎角擠製加工的塑性變形行為，在不同擠製條件下，包含模具轉彎之夾角與摩擦因子等，以分析胚料等通道彎角擠製後之破壞因子 (damage)分佈、有效應力與應變分佈等。最後設計兩組（φ=90º和φ=120º）等通道彎角實驗模具來驗證之。

關鍵字

有限元素 ； 鈦合金 ； 等通道彎角擠製

並列摘要

The shear plastic deformation behavior of a material during equal-channel angular extrusion (ECAE) is governed primarily by the die geometry, the material properties, and the process conditions. This paper employs the rigid-plastic finite element (FE) DEFORM(superscript TM) 2D software to investigate the plastic deformation behavior of Ti-6Al-4V titanium alloy during ECAE processing. Under various ECAE conditions, the FE analysis investigates the damage factor distribution and the effective stress-strain distribution. The relative influences of the internal angle between the two die channels and the friction factors are systematically examined. Finally, two sets of mold and die (including φ=90º and φ=120º) for ECAE are designed to compare the simulated data.

並列關鍵字

finite element ； titanium alloy ； equal-channel angular extrusion