TA11合金叶片挤杆过程中微观组织的数值模拟
Numerical Simulation of Microstructure of TA11 Alloy Blade in Bar-extrusion Process
齐广霞1, 党 淼1, 史丽坤2
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作者单位:1.沈阳理工大学 材料科学与工程学院,辽宁 沈阳110159;2.沈阳黎明航空发动机(集团)有限责任公司 辽宁 沈阳 110043
中文关键字:TA11钛合金; 挤杆; 微观组织演变; 数值模拟
英文关键字:TA11 titanium alloy; bar-extrusion; microstructure evolution; numerical simulation
中文摘要:将TA11合金的微观组织模型写入DEFORM-3D软件的用户子程序中,使其具备了对TA11合金热成形过程中微观组织的预测及模拟功能,并通过对圆柱体镦粗过程的模拟验证了程序的可靠性。以TA11合金叶片的挤杆过程为研究对象,对其微观组织变化进行数值模拟,研究了变形工艺参数对变形过程中微观组织变化的影响。结果表明,合适的变形速度、变形温度和压下量可以使晶粒细化,组织分布均匀,从而提高锻件的力学性能。
英文摘要:In order to predict and simulate the microstructure of TA11 alloy in hot forging process, a microstructure evolution model was embedded in user subroutines of DEFORM-3D software. And the reliability of the program was verified through the simulation of cylinder upsetting. The microstructure evolution in bar-extrusion process for TA11 alloy blade was simulated, the influence of deformation parameters on microstructure evolution in deformation process was studied. The results show that suitable deformation rate, deformation temperature and height reduction can make grain refine, microstructure distribution homogenize, thereby the mechanical properties of the forgings increase.