-1)、變形量50 %。通過分析真應(yīng)力真應(yīng)變曲線,研究鑄態(tài)GH4169合金的熱變形行為；對比分析了Johnson-Cook(JC)、修正的Johnson-Cook(MJC)和應(yīng)變補償Arrhenius三種本構(gòu)模型的相關(guān)系數(shù)(R)和平均相對誤差(AARE)。結(jié)果表明：鑄態(tài)GH4169合金的流變應(yīng)力隨變形溫度的升高和應(yīng)變速率的降低而減小。JC模型、MJC模型和應(yīng)變補償?shù)腁rrhenius本構(gòu)模型的相關(guān)系數(shù)(R)分別為0.891、0.956和0.961,平均相對誤差(AARE)依次為29.02%、11.16%和9.31%。因此,應(yīng)變補償?shù)腁rrhenius模型能夠更為精確地描述鑄態(tài)GH4169的熱變形行為。"/>

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鑄態(tài)GH4169合金熱變形行為及三種本構(gòu)模型對比
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1.西安建筑科技大學(xué)冶金工程學(xué)院;2.金川集團有限公司

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國家自然科學(xué)基金資助(項目號51874226)；鎳鈷資源綜合利用國家重點實驗室開放課題(301170504)


Hot deformation behavior of as-cast GH4169 alloy and comparison of three constitutive models
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College of Metallurgy Engineering,Xi’an University of Architecture and Technology,Xi’an

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    摘要:

    本文在Gleeble-1500熱力模擬機上對鑄態(tài)GH4169合金進行熱壓縮試驗,變形參數(shù)為：溫度(1193~1373 K)、應(yīng)變速率(0.01~10s-1)、變形量50 %。通過分析真應(yīng)力真應(yīng)變曲線,研究鑄態(tài)GH4169合金的熱變形行為；對比分析了Johnson-Cook(JC)、修正的Johnson-Cook(MJC)和應(yīng)變補償Arrhenius三種本構(gòu)模型的相關(guān)系數(shù)(R)和平均相對誤差(AARE)。結(jié)果表明：鑄態(tài)GH4169合金的流變應(yīng)力隨變形溫度的升高和應(yīng)變速率的降低而減小。JC模型、MJC模型和應(yīng)變補償?shù)腁rrhenius本構(gòu)模型的相關(guān)系數(shù)(R)分別為0.891、0.956和0.961,平均相對誤差(AARE)依次為29.02%、11.16%和9.31%。因此,應(yīng)變補償?shù)腁rrhenius模型能夠更為精確地描述鑄態(tài)GH4169的熱變形行為。

    Abstract:

    In this paper, the thermal compression test of as-cast GH4169 alloy is performed on a Gleeble-1500 thermo-mechanical simulator. The deformation parameters are: temperature (1193~1373 K), strain rate (0.01~10 s-1), and deformation 50%. By analyzing the true stress and true strain curve, the hot deformation behavior of as-cast GH4169 alloy was studied; the correlation coefficients (R) and average relative errors (AARE) of the three constitutive models of Johnson-Cook (JC), modified Johnson-Cook (MJC) and strain-compensated Arrhenius model are compared and analyzed. The results show that the flow stress of as-cast GH4169 alloy decreases with the increase of deformation temperature and the decrease of strain rate. The correlation coefficients (R) of the JC model, MJC model and strain-compensated Arrhenius constitutive model were 0.891, 0.956, and 0.961, and the average relative errors (AARE) were 29.02%, 11.16%, and 9.31%, respectively. Therefore, the strain-compensated Arrhenius model can describe the thermal deformation behavior of as-cast GH4169 more accurately.

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張兵,岳磊,陳韓峰,張志娟,劉鵬茹,趙芬芬.鑄態(tài)GH4169合金熱變形行為及三種本構(gòu)模型對比[J].稀有金屬材料與工程,2021,50(1):212~222.[Zhang Bing, Yue lei, Chen Hanfeng, Zhang Zhijuan, Liu Pengru, Zhao Fenfen. Hot deformation behavior of as-cast GH4169 alloy and comparison of three constitutive models[J]. Rare Metal Materials and Engineering,2021,50(1):212~222.]
DOI：10.12442/j. issn.1002-185X.20200086

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  • 收稿日期:2020-02-14
  • 最后修改日期:2020-03-09
  • 錄用日期:2020-03-19
  • 在線發(fā)布日期: 2021-02-05
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