摘要
研究了α+β锻造、近β锻造和β锻造对TC17钛合金盘件的显微组织和主要力学性能的影响规律。结果表明:α+β锻造后的合金为等轴组织,近β锻造的合金为双态组织,β锻造的合金为网篮组织,3种工艺获得的显微组织较为典型;3种锻造组织的力学性能差异显著,等轴组织的室温拉伸强度较双态组织稍低,塑性最好,疲劳强度最高,但断裂韧性和蠕变性能相对较差;双态组织的拉伸强度最高,塑性较等轴组织稍有降低,蠕变性能相对等轴组织有较大提高,但其断裂韧性和疲劳强度相对较低;网篮组织的拉伸强度和塑性相对较低,但断裂韧性和蠕变性能均高于另外两种锻造组织。
Effects of α ＋ β forging,near-β forging and β forging on microstructure and mechanical properties of TC17 titanium alloy disks were studied.The results show that α ＋ β forged alloy exhibits equiaxed microstructure,near-β forged alloy shows duplex microstructure,β forged alloy presents basketwave microstructure.Significant effect of the microstructures on mechanical properties of the forged alloy is observed.The alloy with equiaxed microstructure has moderate tensile strength,highest ductility,highest fatigue limit,but lowest value of KICand poor creep property.Duplex microstructure for the alloy exhibits excellent strength and plasticity,and its creep property is improved evidently,but KICand fatigue properties are at a low level.Basket-waved microstructure for the alloy has no advantages in tensile strength and plasticity,but its KICand creep properties are much better than that of the other two microstructure.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2016年第9期57-61,共5页
Transactions of Materials and Heat Treatment
关键词
TC17钛合金
锻造工艺
显微组织
力学性能
TC17 titanium alloy
forging process
microstructure
mechanical property
