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等徑通道擠壓制備超細(xì)晶金屬過程中后壓力影響的有限元分析
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國(guó)家自然科學(xué)基金（10932008）；中國(guó)航空工業(yè)第一集團(tuán)公司航空科學(xué)基金（2008ZF53050）


Finite Element Analysis of Backpressure Effect during Equal Channel Angular Pressing/Extrusion for Ultrafine Grain Metal Preparation
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    摘要:

    使用有限元方法模擬在等徑通道擠壓過程中，后壓力對(duì)材料塑性變形的影響，并對(duì)多道次擠壓試驗(yàn)結(jié)果進(jìn)行分析比較。結(jié)果表明：施加后壓力可以有效提高材料每道次擠壓的塑性變形程度和分布均勻性。在多道次擠壓過程中，施加后壓力可以大幅度降低晶粒最終細(xì)化尺寸，降低擠壓溫度來減小溫度對(duì)晶粒細(xì)化效果的影響。

    Abstract:

    The effect of the backpressure on the plastic deformation of the billet material was investigated by finite element simulation in the equal channel angular pressing/extrusion (ECAP) process. The multiple-pass ECAP experiment results were also analyzed. The results show that the degree and uniformity of plastic deformation can be effectively enhanced by backpressure application during ECAP for every pass. In the multiple-pass ECAP experiment, there is a decrease in the equilibrium grain size and the processing temperature in the ECAP process with backpressure.

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趙 峰,李玉龍,索 濤,劉元鏞.等徑通道擠壓制備超細(xì)晶金屬過程中后壓力影響的有限元分析[J].稀有金屬材料與工程,2010,39(5):883~888.[Zhao Feng, Li Yulong, Suo Tao, Liu Yuanyong. Finite Element Analysis of Backpressure Effect during Equal Channel Angular Pressing/Extrusion for Ultrafine Grain Metal Preparation[J]. Rare Metal Materials and Engineering,2010,39(5):883~888.]
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  • 收稿日期:2009-05-21
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