摘要
研究了典型的损伤容限型钛合金Ti-6Al-4V ELI(TC4-DT)的断裂韧度KIC、疲劳裂纹扩展速率da/dN以及疲劳门槛值ΔKth等损伤容限性能与微观组织的关系,讨论了不同应力比(R值)条件下片状组织与双态组织的疲劳裂纹扩展特性,并与Ti-6Al-4V(TC4)钛合金进行了比较分析。研究结果为高损伤容限型钛合金的微观组织设计和探讨微观组织对损伤容限性能的影响机理奠定了基础。
The relationship between the microstructure and parameters of the typical damage tolerance titanium Ti-6A1-4V ELI（TC4-DT）, such as fracture toughness（KIC）, fatigue crack propagation rate （da/dN） and fatigue △Kth, etc., have been studied. The fatigue crack propagation feature of lamellar and bimodal microstructures at different R values has been discussed. The results will lay a solid foundation for the microstructure design and its effect on the damage tolerance of the titanium alloys.
出处
《钛工业进展》
CAS
2005年第6期10-13,共4页
Titanium Industry Progress
