TA11钛合金高温变形微观组织演变分析
Analyse on Microstructure Evolution of TA11 Titanium Alloy During Hot Compressive Deformation
党 淼1, 齐广霞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； 微观组织； 动态再结晶
英文关键字：TA11 titanium alloy; microstructure; dynamic recrystallization
中文摘要：采用Gleeble-3500热模拟实验机对TA11 (Ti-8Al-1Mo-1V)钛合金进行变形温度为880～1010 ℃、应变速率为0.01～50 s-1、变形程度为30%和50%的压缩变形实验， 研究其在高温变形条件下的动态再结晶行为。基于定向金相测量，通过回归分析建立了TA11钛合金高温变形时初生α相平均晶粒尺寸、动态再结晶体积分数以及动态再结晶晶粒尺寸模型， 模型的计算值与实验值的平均误差小于12%，能较好地描述材料在热加工过程中发生动态再结晶的动力学规律。
英文摘要：The compression deformation test of TA11(Ti-8Al-1Mo-1V) titanium alloy at 880～1010 ℃, strain rate between 0.01s-1 and 50 s-1, deformation of 30% and 50% was carried out using Gleeble-3500 thermal simulation machine, its dynamic recrystallization behavior at high-temperature deformation was studied. The model of primary α average grain size, dynamic recrystallization volume fraction and dynamic recrystallization grain size of TA11 titanium alloy in (α+β) field were established based on quantitative metallurgical technique using regression analysis. The average difference between the calculated and experimental values is less than 12%. The model can describe the law of the dynamic recrystallization kinetics of the material during thermal processing.