摘要
先进航空发动机及超声速飞行器的发展对耐热轻质的600℃高温钛合金材料提出了迫切需求。600℃高温钛合金主要用于制造发动机600℃以下高温段高压压气机轮盘、叶片、整体叶盘、机匣以及飞行器机身构件、蒙皮等,可以显著减轻结构重量,大幅提高发动机的推重比和飞行器的飞行速度和机动性。600℃高温钛合金的设计受蠕变与热稳定性本质矛盾的限制,为了最大程度发挥高温蠕变抗力,同时兼顾塑性、热稳定性等,基于当量设计准则和扩散理论,设计研制新的600℃高温钛合金材料TA29,合金系为Ti-Al-Sn-Zr-Nb-Ta-Si-C。TA29钛合金具有优异的热强性,良好的断裂韧度、塑性和热稳定性,其整体叶盘部件成功通过了发动机强度考核试验,有望推广应用于先进航空发动机、超高声速导弹等飞行器的高温结构部件。应加强TA29钛合金高温蠕变-疲劳-环境交互作用、微织构、表面完整性、残余应力分析及其对使用性能影响等研究。
The developments of advanced aeroengine and ultrasonic aircraft have impending demands for 600℃ high temperature titanium alloy which is heat-resistant and has a relatively low density.By substituting steel or superalloys,600℃ high temperature titanium alloy can be manufactured into high pressure compressor discs,blades,blisks and casing of aeroengines,structural components and airframe skins of aircraft.As a result,the weight of aeroengine and aircraft can be reduced,thus the thrust-weight ratio of aeroengine,flight speed and flexibility of aircraft can be improved markedly.The design of 600℃ high temperature titanium alloy is restricted by the intrinsic contradiction between creep and thermal stability.To maximize the creep resistance,meanwhile keeping a combination of good fracture toughness,ductility and thermal stability,a new generation 600℃ titanium alloy TA29 of Ti-Al-Sn-Zr-Nb-Ta-Si-C system was designed and developed based on the Equivalent Design Criterion（EDC） and Diffusion Theory to meet the rigid design demand.TA29 alloy may seek a wide scope of application,such as high temperature components in advanced aeroengines and ultrasonic aircraft.The creep-fatigue-environment interaction,micro-textured region,surface integrality,residual stress and service properties of TA29 alloy and its components may be the research emphases in the future.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2014年第4期27-36,共10页
Journal of Aeronautical Materials
