TC4钛合金L型材高温弯曲蠕变的数值模拟研究

Numerical Simulation of Bending Creep of TC4 Titanium Alloy L Profile at High Temperature

摘要:

利用ABAQUS有限元软件,针对TC4钛合金L型材,分别在蠕变温度为500℃、600℃和700℃,及蠕变时间为600s、1200s、1800s的条件下,进行高温压弯蠕变的数值模拟分析,研究温度和时间对TC4钛合金L型材高温压弯蠕变变形后回弹量的影响规律。数值模拟结果表明,TC4钛合金应力松弛效果受温度影响明显,当温度为700℃时,应力松弛后残余应力降低至50MPa以下；蠕变时间为600s时,应力松弛后残余应力已经降低到趋于稳定的极限值,继续增加蠕变时间,应力松弛效应不发生显著变化。

Abstract:

Based on ABAQUS finite element software, in view of TC4 titanium alloy L profile, under the conditions of creep temperature of 500℃, 600℃ and 700℃, and creep time of 600s, 1200s, 1800s, the numerical simulation analysis of high temperature bending creep is carried out to study the influence of temperature and time on the springback after high temperature bending creep deformation of TC4 titanium alloy L profile. The numerical simulation results show that the stress relaxation effect of TC4 titanium alloy is significantly affected by temperature, when the temperature is 700℃, the residual stress after stress relaxation is reduced to below 50MPa; when the creep time is 600s, the residual stress after stress relaxation has been reduced to a stable limit value, continue to increase the creep time, the stress relaxation effect is not significant.