摘要
以提高钛合金的抗蠕变性能为目的,在TA32钛合金基体上制备由NiCrAlY黏接层(BC)与氧化钇稳定二氧化锆陶瓷层(TC)组成的热障涂层(TBCs),对带TBCs钛合金抗蠕变性能进行实验与数值模拟研究。结果表明:TA32与TBCs的蠕变速率相差较大,在高温拉伸时TC会对BC和基体的蠕变变形产生明显的约束效应,且TBCs中BC承受的轴向拉伸应力较大。在400℃和600℃实验温度下,TBCs可将TA32的抗蠕变性能分别提升5.6%与17.5%,但当实验温度达到600℃、拉伸应力达到200 MPa时,TC发生了严重的开裂与剥落。
With the aim of improving the creep resistance of titanium alloy, NiCrAlY(bond coat, BC)/yttria stabilized zirconia(top coat, TC) thermal barrier coatings(TBCs) were deposited on TA32 substrate,and the creep resistance of titanium alloy with TBCs was studied by test and numerical simulation.The results showed that there was a large difference between the creep rate of TA32 and that of TBCs. TC had an obvious constraint effect on the creep deformation of TA32 during tensile process at high temperatures, and the axial tensile stress of NiCrAlY BC in TBCs was larger than other parts. At 400 ℃ and 600 ℃, TBCs improved the creep resistance of TA32 by 5.6% and 17.5%, respectively. However, when the test temperature reached 600 ℃ and the tensile stress reached 200 MPa, severe cracking or peeling occurred in TC.
作者
赵彬
张婷婷
夏甜
王纯
白宇
ZHAO Bin;ZHANG Tingting;XIA Tian;WANG Chun;BAI Yu(State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China;Shenyang Aircraft Design and Research Institute,Aviation Industry Corporation of China Limited,Shenyang 110035,China;Beijing Aeronautical Manufacturing Technology Research Institute,Aviation Industry Corporation of China Limited,Beijing 100024,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2020年第8期1762-1767,共6页
Journal of Aerospace Power
关键词
钛合金
飞机壁板
热障涂层
抗蠕变性能
有限元分析
titanium alloy
aircraft panel
thermal barrier coatings
creep resistance
finite element analysis
