锻压技术

TC4钛合金叶片等温成形多塑性变形机制模拟分析

英文标题：Simulation of multiple plastic deformation mechanism for isothermal forming of TC4 titanium alloys blade

作者：董俊哲李付国肖美立汪程鹏

单位：西北工业大学

分类号：TG 316.3

出版年,卷(期):页码：2013,38(1):159-164

摘要：

以TC4钛合金等温锻造为例，提出了变形过程中材料所处塑性状态的判断依据。通过正交试验，得到了基于本构方程的应变速率敏感指数的计算方法，同时计算出不同应变下应变速率敏感指数等值线，便于判断材料所处的塑性状态。通过数值模拟，验证了多塑性变形机制，进一步说明在变形过程中材料内部同时存在多种塑性变形机制，且随着变形的不断进行，各种塑性变形机制会发生相互转变。

In the isothermal forging processing of TC4 titanium alloys, a criterion deciding the plastic state of material was put forward. Strain rate sensitive index was calculated through the experimental data with the orthogonal test. In order to judge the plastic state conveniently, the contour lines of strain rate sensitive index was obtained under different strains. The simulated results indicate that there are different plastic deformation mechanisms in the deformation processing. It is evident that multiple plastic deformation mechanism is correct and the transformations of different mechanisms occur during the processing of deformation.

基金项目：

航空科学基金资助项目(2011ZE53059)

参考文献：

［1］余小鲁,李付国.TC4钛合金风扇转子叶片模锻工艺和性能研究[J].锻压技术，2010,35(3): 19-21.
［2］中国机械工程学会.金属手册:第14卷成形和锻造[M].北京: 机械工业出版社, 1994.
［3］何敏,张李骊,陈希凯,等.TC4合金盘件等温成形工艺过程控制[J].徐州工程学院学报，2008,23(3): 10-16.
［4］李晓丽,李淼泉.TC6合金等温锻造过程中晶粒尺寸的数值模拟[J].中国有色金属学报，2005,15(9): 1332-1337.
［5］李飞,吴伏家.TC4钛合金等温锻造工艺数值模拟[J].机械工程与自动化，2008, (2): 74-75.
［6］Guo H Z, Zhao Z L, Wang B, et al. The effect of isothermal forging process parameters on the microstructure and the properties of TA15 near α titanium alloy[A]. The 6th Pacific Rim International Conference on Advanced Materials and Processing [C]. Jeju Island, 2007.
［7］Huang C, Dean T A, Loretto M H. Deformation behaviors of Ti-25Al-10Nb-3V-1Mo (Super α2) during isothermal forging[J]. Mater Sic Eng A,1996,A208(2):166-171.
［8］Yang H, Zhan M, Liu Y L. A 3D rigid-viscoplastic FEM simulation of the isothermal precision forging of a blade with a damper platform [J].J. Mater. Process Tech., 2002,122(1): 45-50.
［9］刘莹莹,姚泽坤,罗茜,等. Ti-24A1-15Nb-1.5Mo合金的超塑性能及超塑变形时的组织演化[J].稀有金属材料与工程,2008,37(1):14-18.
［10］Zhang K F, Zhao Q Y, Wang C W. Simulation of superplastic sheet forming and bulk forming[J].J. Mater. Process Technol,1995,55(1): 24-27.
［11］Li Q H, Li F G, Wan Q. Finite element simulation of superplastic isothermal forging process for nickel-base PM superalloy[A]. Proceedings of the 9th International Conference on Superplasticity in Advanced Materials [C]. Chengdu,2007.
［12］蔡军,李付国.一种基于等温多塑性变形机制耦合的数值模拟方法[J].稀有金属材料与工程，2011,40(5): 778-783.
［13］Han C S, Grandhi R V, Srinivasan R. Optimum design of forging die shapes using nonlinear finite element analysis [J]. AIAA Journal，1993,31(4): 774-781.
［14］Kang B S, Li J H, Kim S H. Development of a methodology to form netshape nosing shells by the backward tracing scheme of the rigidplastic FEM[J]. International Journal of Machine Tools and Manufacture， 1997,37(6): 73-75.

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