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TA15鈦合金高溫熱壓縮變形行為及熱加工圖
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北京科技大學,西北有色金屬研究院,北京科技大學,北京科技大學

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中圖分類號:

TG146.2 3

基金項目:

國家重點研發(fā)計劃項目（2016YFB0300900）


Hot Compression Deformation Behavior and Processing Map of TA15 alloy
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Affiliation:

Institute for Advanced Materials and Technology,Uiversity of Science and Technology Beijing,Northwest Institute for Nonferrous Metal Research,Xi’an,Institute for Advanced Materials and Technology,Uiversity of Science and Technology Beijing,Institute for Advanced Materials and Technology,Uiversity of Science and Technology Beijing

Fund Project:

The National Key Technologies R&D Program of China（2016YFB0300900）

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    摘要:

    獲得準確的鈦合金塑性變形特征和熱加工條件，是鈦合金擠壓、軋制等塑性加工工藝參數(shù)選擇的重要依據(jù)。本文研究了TA15鈦合金在應變速率0.01~20 s-1、變形溫度850～1050℃條件下的壓縮變形行為、組織特征，采用Arrhenius雙曲正弦函數(shù)模型推導出了TA15本構(gòu)方程，基于動態(tài)材料模型建立了合金在真應變0.1~0.7時的熱加工圖。結(jié)果表明，在本文的應變速率和變形溫度的條件下進行壓縮變形，隨著變形溫度的升高，合金中的α相逐漸向β相轉(zhuǎn)變；隨著應變速率的提高，α相向β相轉(zhuǎn)變的程度逐漸減小。根據(jù)熱加工圖確定了合金的兩個熱加工安全區(qū)域：（1）變形溫度950~1050℃、應變速率0.01~0.37 s-1；（2）變形溫度875~950℃、應變速率1.65~13.5 s-1。

    Abstract:

    Plastic deformation characteristics and hot processing conditions are important bases for the selection of processing parameters of extrusion and rolling of titanium alloy.The compressive deformation behavior and microstructure of TA15 alloy were investigated at temperature range of 850~1050℃ and strain rate range of 0.01~20 s-1.The constitutive equation of TA15 alloy was derived through Arrhenius hyperbolic sine function.Based on dynamic materials modeling(DMM), the processing map of TA15 alloy was established for strain of 0.1~0.7.The results show that α phase in the alloy gradually transforms to β phase with the increase of deformation temperature. The transform extent of α phase to β phase gradually reduces with the increase of the strain rate. According to processing map, the two hot processing safety areas of the alloy were determined: (1) deformation temperature 950~1050℃, strain rate 0.01~0.37 s-1; (2) deformation temperature 875~950℃, strain rate 1.65~13.5 s-1.

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引用本文

徐猛,賈蔚菊,張志豪,謝建新. TA15鈦合金高溫熱壓縮變形行為及熱加工圖[J].稀有金屬材料與工程,2017,46(9):2708~2713.[Xu Meng, Jia Weiju, Zhang Zhihao, Xie Jianxin. Hot Compression Deformation Behavior and Processing Map of TA15 alloy[J]. Rare Metal Materials and Engineering,2017,46(9):2708~2713.]
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  • 收稿日期:2016-03-29
  • 最后修改日期:2017-09-08
  • 錄用日期:2017-02-20
  • 在線發(fā)布日期: 2017-11-29
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