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TB6鈦合金熱變形行為及本構(gòu)模型研究
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國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目 (50735005, 50935007)；國(guó)家自然科學(xué)青年基金 (50905145) 和國(guó)家“973”計(jì)劃 (2010CB731701)


Research on Hot Deformation Behavior and Constitutive Model of Titanium Alloy TB6
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    摘要:

    研究材料的熱變形行為及建立其本構(gòu)模型是進(jìn)行材料加工與模擬的基礎(chǔ)。通過對(duì)TB6鈦合金熱變形行為分 析，表明流變應(yīng)力受應(yīng)變速率的影響較顯著，而變形溫度對(duì)流變應(yīng)力的影響程度與應(yīng)變速率的大小有關(guān)。采用Arrhenius型雙曲正弦方程建立了TB6鈦合金流變應(yīng)力本構(gòu)模型。研究變形條件對(duì)TB6鈦合金流變應(yīng)力的影響。結(jié)果表明，可通過控制應(yīng)變速率和變形激活能來控制熱加工的應(yīng)力水平和力能參數(shù)，為TB6鈦合金塑性加工過程控制和模擬提供前提條件。

    Abstract:

    Hot deformation behavior and constitutive model play fundamental roles in processing and simulation of materials. The analysis of the hot deformation behavior of titanium alloy TB6 shows that the strain rate influences the flow stress significantly and the effect of deformation temperature on flow stress is correlated with the strain rate. In this paper, the constitutive model was established based Arrhenius-type hyperbolic sine equation. The investigation on the influence of deformation condition on flow stress was carried out. The results show that the flow stress and force can be controlled by changing the strain rate and activation energy. This study provides a guideline for the control and simulation of plastic deformation of titanium alloy TB6.

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崔軍輝,楊 合,孫志超. TB6鈦合金熱變形行為及本構(gòu)模型研究[J].稀有金屬材料與工程,2012,41(7):1166~1170.[Cui Junhui, Yang He, Sun Zhichao. Research on Hot Deformation Behavior and Constitutive Model of Titanium Alloy TB6[J]. Rare Metal Materials and Engineering,2012,41(7):1166~1170.]
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  • 收稿日期:2011-07-21
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