Cellular Automaton Simulation of Dynamic Recrystallization Behavior in BT25 Titanium Alloy

被引：0
|
作者：
Feng R. [1 ]
Wang K. [1 ]
Lu S. [1 ]
Li X. [1 ]
Ouyang D. [2 ]
Zhou X. [1 ]
Zhong M. [1 ]
机构：
[1] School of Aerospace Manufacturing Engineering, Nanchang Hangkong University, Nanchang
[2] School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2020年 / 56卷 / 20期
关键词：
BT25 titanium alloy; Cellular automata; Dynamic recrystallization; Numerical simulation; Thermal deformation;
D O I：
10.3901/JME.2020.20.066
中图分类号：
学科分类号：
摘要：
In order to study the effect of thermal processing parameters on microstructure of titanium alloy during plastic forming, the single-pass isothermal constant strain compression test of BT25 titanium alloy is carried out by Gleeble-3500 thermal simulation machine. The true stress-strain curves are analyzed and the dynamic equation of JMAK recrystallization is established. Based on analysis of thermal deformation behavior, dislocation density model, recrystallization nucleation model and grain growth model are derived. A cellular automata (CA) model is established through the algorithm to simulate and verify the dynamic recrystallization(DRX) behavior of BT25 titanium alloy during thermal deformation. The results show that the flow stress of BT25 titanium alloy is very sensitive to the strain rate and deformation temperature. Increasing deformation temperature or decreasing strain rate is beneficial to dynamic recrystallization of materials. The CA model simulated the grain size about the error is 3%, and predicted the DRX volume fraction about error within 10%. This model has good prediction accuracy. A reliable basis is provided for optimizing technological parameters and controlling microstructure evolution of forging in the process of plastic machining. © 2020 Journal of Mechanical Engineering.
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页码：66 / 73
页数：7
相关论文
共 21 条
  • [1] FU Yanyan, SONG Yueqing, HUI Songxiao, Et al., Research and application of typical aerospace titanium alloys, Chinese Journal of Rare Metals, 37, 6, pp. 850-856, (2006)
  • [2] JIN Hexi, WEI Kexiang, LI Jianming, Et al., Research development of titanium alloy in aerospace industry, Chinese Journal of Nonferrous Metals, 25, 2, pp. 280-292, (2015)
  • [3] GAO Ze, ZHANG Deyuan, LI Zhe, Et al., Research on surface quality of titanium qlloy webs via high-speed ultrasonic elliptical vibration milling, Journal of Mechanical Engineering, 55, 7, pp. 249-256, (2019)
  • [4] ZHOU Guowei, LI Zihan, LI Dayong, Et al., A polycrystal plasticity based discontinuous dynamic recrystallization simulation method and its application to copper, International Journal of Plasticity, 91, pp. 48-76, (2017)
  • [5] CHEN Fei, CUI Zhenshan, DONG Dingqian, Research progress in cellular automaton simulation of microstructure evolution, Journal of Mechanical Engineering, 51, 4, pp. 30-39, (2015)
  • [6] DING R, GUO Z X., Coupled quantitative simulation of microstructural evolution and plastic flow during dynamic recrystallization, Acta Materialia, 49, pp. 3163-3175, (2001)
  • [7] LI Hongwei, SUN Xinxin, YANG He, A three-dimensional cellular automata-crystal plasticity finite element model for predicting the multiscale interaction among heterogeneous deformation,DRX microstructural evolution and mechanical responses in titanium alloys, International Journal of Plasticity, 87, pp. 154-180, (2016)
  • [8] SHI Xianzhe, DU Shiwen, Static recrystallization mechanism of LZ50 steel and cellular automata simulation, Journal of Mechanical Engineering, 55, 14, pp. 43-52, (2019)
  • [9] XIN Shewei, ZHAO Yongqing, ZHOU Wei, Et al., Effect of two typical heat treatments on microstructure and mechanical property of electron beam weldment of BT25Y, Rare Metal Materials and Engineering, 46, 11, pp. 3422-3427, (2017)
  • [10] WANG Yang, ZENG Weidong, MA Xiong, Et al., Quantitative metallography analysis of microstructure of BT25 titanium alloy deformed in two-phase field, Chinese Journal of Nonferrous Metals, 23, 7, pp. 1861-1865, (2015)
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