研究了β斑点对Ti-10V-2Fe-3Al合金的室温拉伸性能和低周疲劳性能的影响,发现在β斑点区内,裂纹沿原始β晶界扩展形成沿晶脆性断裂,在交变应力作用下,β斑点往往成为疲劳源点,在高应变下,β斑区内的原始β晶界和晶界α处萌生裂纹并导致早期断裂。
Effect of β-fleck on properties of tensile elongation and low cycle fatigue life at room temperature for Ti-10V-2Fe-3Al alloy has been investigated. The cracks along initial β-grain boundaries in the β-fleck region may propagate to form intergranular brittle fracture. Under alternating load, the β-fleck often becomes a fatigue origin. While under higher strain, the cracks initiate and propagate to fracture early at the original β-grain boundaries in β-fleck region and at α-grain boundaries.
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