工業純鈦TA2熱變形過程的流變行為本構方程

柴希陽; 高志玉; 潘濤; 柴鋒; 楊志剛; 楊才福

doi:10.13374/j.issn2095-9389.2018.02.013

工業純鈦TA2熱變形過程的流變行為本構方程

doi: 10.13374/j.issn2095-9389.2018.02.013

柴希陽^1,2,
高志玉^1,3,
潘濤^1, ,,
柴鋒¹,
楊志剛²,
楊才福¹

1) 鋼鐵研究總院工程用鋼研究所, 北京 100081
2) 清華大學材料科學與工程學院, 北京 100084
3) 遼寧工程技術大學材料科學與工程學院, 阜新 123099

基金項目:

國家國際科技合作專項資助項目（2015DFR50320）；國家高技術研究發展計劃資助項目（2015AA03A501）

詳細信息

中圖分類號: TG142.71
計量
- 文章訪問數: 766
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- 被引次數: 0
出版歷程
- 收稿日期: 2017-05-02

Constitutive equation for flow behavior of commercially pure titanium TA2 during hot deformation

1) Department of Structural Steels, Central Iron and Steel Research Institute, Beijing 100081, China
2) School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
3) School of Materials Science and Engineering, Liaoning Technical University, Fuxin 123099, China

摘要

摘要: 利用Gleeble-3800熱模擬實驗機研究了工業純鈦TA2的熱變形行為.變形溫度為750~1000℃，步長50℃，應變速率分別為0.01、0.1、1和10 s^-1.實驗結果表明，TA2在熱壓縮變形過程中發生了加工硬化以及動態回復、動態再結晶.隨著變形溫度的降低和應變速率的增加，流變應力逐漸增加.為了準確預測TA2的高溫流變行為，基于實驗數據和雙曲正弦Arrhenius模型構建了考慮應變影響的本構方程，本構方程中材料常數α、n、Q、lnA與應變之間存在6階多項式關系.本文所提出考慮應變影響的本構方程可以用于研究工業純鈦TA2的高溫流變行為.
- 工業純鈦 /
- 熱變形 /
- 本構方程 /
- 應變
Abstract: The hot deformation behavior of TA2, which is commercially pure titanium, was investigated using a Gleeble-3800 simulator over temperature and strain ranges of 750-1000℃ and 0.01-10 s^-1, respectively. The results show that during hot compressive deformation, work hardening, dynamic recovery, and dynamic recrystallization occur. The flow stress increases as temperature decreases and strain rate increases. To accurately predict the flow behavior for the alloy, constitutive equations considering the effect of strain were derived based on the obtained experimental data and a hyperbolic sine Arrhenius-type model. The material constants α, n, Q, and lnA were found to be functions of strain and could be fitted by employing a sixth-order polynomial. Subsequently, the developed constitutive model can be employed to describe the deformation behavior of commercially pure titanium TA2.
- commercially pure titanium /
- hot deformation /
- constitutive equations /
- strain

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參考文獻(15)

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