钢铁钒钛2025，Vol.46Issue(4)：52-58,7.DOI:10.7513/j.issn.1004-7638.2025.04.007
析出强化型TB9合金组织调控及抗疲劳裂纹扩展机制研究
Microstructure tailoring and fatigue crack resistance in precipitation-strengthened TB9 titanium alloy
ZHANG Zhao 1TENG Aijun 1DONG Entao 2MA Zhiwei 2WANG Jiale 2YUAN Zikai 2GUO Jie 2FANG Qiang3
作者信息
- 1. Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102200,China||State Key Laboratory of Metal Materials for Marine Equipment and Application,Anshan 114009,Liaoning,China
- 2. Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102200,China
- 3. Chengdu Advanced Metal Materials Industrial Technology Institute Co.,Ltd.,Chengdu 610303,Sichuan,China
- 折叠
摘要
Abstract
The effect of microstructure on mechanical properties in TB9(Ti-3Al-8V-6Cr-4Mo-4Zr)ti-tanium alloy subject to different heat-treatment processes had been investigated.The results show when the solid solution temperature increases from 800 ℃to 810 ℃,and β grain size in the obtained alloyed after complete heat treatment slightly increases,while tensile strength decreases significantly.When the solid solution process remains same,the occurrence of precipitates free zones can be observed within βgrain after aging at 500 ℃ for 8 h.The distribution of α precipitates becomes homogeneous with pro-longed aging time,and there is a peak-value of tensile strength at aging temperature of 500℃ for 16 h.Based on the microstructure observations,both heat treatment processes of 800 ℃-0.5 h,AC+500 ℃-16 h,AC and 810 ℃-0.5 h,AC+520 ℃-8 h,generate comparable microstructures,while the former pro-cess can achieve superior tensile and fatigue properties.Although roughness-induced crack closure ef-fect is main fatigue crack resistance behavior in both alloys after different heat treatment processed,fa-tigue data normalized by tensile strength verifies that the size and distribution of α precipitates impact mechanical properties significantly.关键词
TB9钛合金/析出强化/疲劳性能/抗拉强度/位错缺陷Key words
TB9 alloy/precipitation strengthening/fatigue properties/tensile strength/dislocation分类
矿业与冶金引用本文复制引用
ZHANG Zhao,TENG Aijun,DONG Entao,MA Zhiwei,WANG Jiale,YUAN Zikai,GUO Jie,FANG Qiang..析出强化型TB9合金组织调控及抗疲劳裂纹扩展机制研究[J].钢铁钒钛,2025,46(4):52-58,7.
