TB8钛合金热变形行为及微观组织演变研究

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中图分类号：TP391.9 文献标志码：B 文章编号：1671-5276（2025）06-0056-06

Abstract：Thispaper investigatesthehigh-temperaturetensilerheologicalbehaviorof TB8titaniumaloy.Basedonthetrue stress-straincurvesof TB8titaniumaloyat diffrent temperaturesandstrainrates，anoptimizedJohnson-Cook constitutive model wasdeveloped，andtheevolutionpaternsof microstructuresunderdiffrentdeformationconditionswereanalyzed.The results indicate thattemperatureincreasing，strainratereducingandstrainamount increasingcanenhancethematerial‘s plasticityandreducetherheologicalstress.TheoptimizedJohnson-Cookconstitutivemodelcanaccuratelypredictthehightemperature rheological behavior of the TB8 titanium alloy.

Keywords：TB8 titaniumall；high temperaturerheological behaviour；Johnson-Cookconstitutivemodel；microstructure

0 引言

TB8钛合金是一种 β 型钛合金，其名义成分为 Ti-15Mo-3Al-2.7Nb-0.2Si ，具有质量轻、强度高、耐磨损及与复合材料粘接效果好等优点，常用于制造各种高使用寿命飞机发动机结构件、飞机结构件等[]。（剩余6879字）