摘要
通过薄片试样原位拉伸和圆棒拉伸实验研究了富Nd第二相颗粒的早期脆性断裂对一种近α型钛合金断裂行为的影响。结果表明 ,随颗粒体积分数的增加 ,合金的拉伸强度有所降低 ,但合金的塑性得到改善。富Nd第二相颗粒的早期脆性断裂不会导致材料的脆性断裂倾向 。
By means of in situ SEM tensile deformation and rod sample deformation tests, the effect of brittle fracture of Nd rich second phase particles on the fracture behaviors of a near α titanium alloy has been investigated. The results show that the formation of Nd rich second phase particles can improve ductility of this alloy and reduce tensile strength to some extent. And early brittle fracture of particles has no detrimental effect on plastic deformation behaviors due to the beneficial microstructure changes caused by formation of Nd rich particles.
出处
《航空材料学报》
EI
CAS
CSCD
2000年第3期27-32,共6页
Journal of Aeronautical Materials
关键词
富钕第二相颗粒
高温钛合金
拉伸断裂
Nd rich second phase particle
fracture
voids
crack initiation and propagation
