摘要
研究了双态组织的TA15钛合金的高周疲劳性能和疲劳断裂特征,结果表明,β转变组织中次生α相的数量和形态对疲劳性能有显著影响,次生相α相的球化显著降低了合金抗裂纹扩展的能力,而大量的片状次生α相则通过造成疲劳裂纹的分枝有效地降低了疲劳裂纹的扩展速度,提高了疲劳极限。
The high cycle fatigue properties and fracture features of TA15 titanium alloy were investigated. The results show that there is a great influence on the morphology and amount of the secondary α phase in the transformed β microstructure on the fatigue properties. The spherical secondary α phases in the transformed β microstructure decrease the crack propagation resistance, while the great deal of plate-like secondary a phases, which lead to crack deflection, effectively decrease the crack propagating rate and improve the fatigue strength.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2004年第3期28-30,34,共4页
Journal of Materials Engineering
关键词
钛合金
组织
疲劳
断裂
titanium alloy
microstructure
fatigue
fracture
