论文部分内容阅读
将所建立的本构方程和组织演化模型耦合到有限元模拟软件,对Ti Al合金锻坯变形过程进行模拟和实验。结果表明,随着变形量的增加,锻件的均匀性增大,当变形量达到87.5%时,均匀变形区扩大至93%;温度场的分布发生改变,87.5%变形结束时心部温度较低,而鼓肚温度较高。变形过程中最大载荷的计算值与实际值误差在9%以内,动态再结晶晶粒尺寸和体积分数的计算值与实际值误差在10%以内。
The established constitutive equation and the evolution model were coupled to the finite element simulation software to simulate and experiment the deformation process of TiAl alloy preform. The results show that with the increase of deformation, the uniformity of forging increases. When the deformation reaches 87.5%, the uniform deformation area expands to 93%, the distribution of temperature field changes, while the temperature of 87.5% , While drum belly temperature is higher. The error between the calculated value and the actual value of the maximum load during deformation is within 9%. The calculated value of dynamic recrystallized grain size and volume fraction is within 10% of the actual value.