|
Based on the software Deform-3D, 3D finite element heating model of Ti6Al4V ELI Ti alloy was founded. The heating processes of Ti6Al4V ELI Ti alloy under different temperature curves were detailed simulated, and the simulated accuracy of heating time was verified by heat treatment experiments. The results show that the holding time of billet in the β-phase can significantly be shorten by segmented heating approach, and the greater the blank size is, the more obvious the advantages are. By experimental verification, the core microstructure of billet is done metallographic observation after heat treatment, it is found that all primary α-phase are all disappeared, and β-phase occurs by transforming. There are obvious boundary and two phase microstructure becomes widmanstatten one, which shows that the core microstructure of billet is heated thoroughly and proves that the established model is reliable.
|
|
［1］朱知寿，马少俊，王新南，等. TC4-DT损伤容限型钛合金疲劳裂纹扩展特性的研究[J]. 钛工业进展, 2005, 22(6):10-13.Zhu Z S，Ma S J，Wang X N，et al. Study on fatigue crack propagation rate of TC4-DT damage tolerance titanium alloy[J]. Titanium Industry Progress,2005, 22(6):10-13.
［2］Tamilselvi S, Raman V, Rajendran N. Corrosion behaviour of Ti-6Al-7Nb and Ti-6Al-4V ELI alloys in the simulated body fluid solution by electrochemical impedance spectroscopy[J]. Electrochimica Acta, 2006, 52(3): 839-846.
［3］Feng B X, Mao X N, Yang G J, et al. Residual stress field and thermal relaxation behavior of shot-peened TC4-DT titanium alloy[J]. Materials Science and Engineering: A, 2009, 512(1-2): 105-108.
［4］Lu W, Shi Y, Lei Y, et al. Effect of electron beam welding on the microstructures and mechanical properties of thick TC4-DT alloy[J]. Materials & Design, 2012, 34: 509-515.
［5］沙爱学，李兴无，曾卫东，等. 钛合金β区加热保温时间的研究[J]. 航空材料学报,2010,(4):8-11.Sha A X, Li X W,Zeng W D, et al. Study on holding time of β zone heating of titanium alloy[J]. Journal of Aeronautical Materials, 2010,(4):8-11.
［6］李辉. 损伤容限型TC4-DT钛合金疲劳裂纹扩展速率研究[D]. 西安：西北工业大学，2006.Li H. A Study of Fatigue Crack Growth Rate of TC4-DT Titanium Alloy with Damage Tolerance[D]. Xian: Northwestern Polytechnical University,2006.
［7］周伟，曲恒磊，赵永庆，等. 热处理对TC4合金组织与性能的影响[J]. 热加工工艺,2005,34(8): 26-27.Zhou W, Qu H L, Zhao Y Q, et al. Effect of heat treatment on microstructure and mechanical properties of TC4 alloy[J]. Hot Working Technology,2005,34(8): 26-27.
［8］王悔改，冷文才，李双晓，等. 热处理工艺对TC4钛合金组织和性能的影响[J]. 热加工工艺, 2011,40(10): 181-183.Wang H G, Leng W C, Li S X,et al. Effects of heat treatment process on microstructure and mechanical properties of TC4 alloy[J]. Hot Working Technology, 2011, 40(10): 181-183.
［9］聂蕾，李付国，方勇. TC4合金的新型本构关系[J]. 航空材料学报, 2001,(3): 13-18.Nie L,Li F G, Fang Y. New constitutive relationship for Ti-6Al-4V alloy[J]. Journal of Aeronautical Materials, 2001,(3): 13-18.
［10］王建斌，胡宗式，邵军，等. TC4合金棒材的纵向微观组织[J]. 中国有色金属学报,2010,20(S1): 780-783.Wang J B, Hu Z S, Shao J, et al. Longitudinal microstructures of Ti-6Al-4V alloy bars[J].The Chinese Journal of Nonferrous Metals,2010,20(S1): 780-783.
|
