CAJ | 학술논문

采用Gleeble-3500热模拟试验机对TA15钛合金进行等温压缩试验。根据试验获得的σ-ε曲线确定合金的再结晶体积分数，并对σ-ε曲线进行加工硬化处理确定再结晶临界应变，研究热变形条件对该合金再结晶临界应变和再结晶体积分数的影响。结果表明，动态再结晶临界应变随着变形温度的升高而减小，随着应变速率的增大而增大；动态再结晶体积分数随着变形温度的升高而增大，随着应变速率的增大而减小。TA 15钛合金具有变形温度敏感性和应变速率敏感性，合理选择合金的变形温度和应变速率，可以控制合金性能及细化晶粒。
채용Gleeble-3500열모의시험궤대TA15태합금진행등온압축시험。근거시험획득적σ-ε곡선학정합금적재결정체적분수，병대σ-ε곡선진행가공경화처리학정재결정림계응변，연구열변형조건대해합금재결정림계응변화재결정체적분수적영향。결과표명，동태재결정림계응변수착변형온도적승고이감소，수착응변속솔적증대이증대；동태재결정체적분수수착변형온도적승고이증대，수착응변속솔적증대이감소。TA 15태합금구유변형온도민감성화응변속솔민감성，합리선택합금적변형온도화응변속솔，가이공제합금성능급세화정립。
Isothermal compression test of TA15 titanium alloy was carried out by using Gleeble-3500 thermal simulation test machine.The recrystallization volume fraction of the alloy was determined by the resulting σ-εcurve,and then the σ-εcurve was subjected to work hardening to determine the recrystallization critical strain, which aimed at investigating the effect of hot deformation parameters on the recrystallization critical strain and recrystallization volume fraction of the alloy.The results show that the dynamic recrystallization critical strain decreases with the increase of deformation temperature,but increases with the increase of strain rate,and that the dynamic recrystallization volume fraction increases with the increase of deformation temperature,but decreases with the increase of strain rate.The TA15 alloy is susceptible to both the deformation temperature and the strain rate. Property of the alloy is able to be controlled,and its grain is able to be fined so long as the deformation temperature and the strain rate are reasonably selected.