TY - JOUR
T1 - Fatigue crack growth behavior of beta-annealed Ti-6Al-2Sn-4Zr-xMo (x = 2, 4 and 6) alloys
T2 - Influence of microstructure and stress ratio
AU - Qiu, Jianke
AU - Feng, Xin
AU - Ma, Yingjie
AU - Lei, Jiafeng
AU - Huang, Aijun
AU - Rugg, David
AU - Yang, Rui
PY - 2016/2/1
Y1 - 2016/2/1
N2 - The influence of microstructures (β grain size, α/β colony size and width of α lath) and stress ratios (R = 0.1, 0.7) on fatigue crack growth (FCG) behavior of beta-annealed Ti624x (x = 2, 4 and 6) alloys was investigated. The FCG rate curves, crack paths, and the plastic zone ahead of the crack tip were compared. The reducing FCG resistance from Ti6242 to Ti6246 was found to stem from decreasing α/β colony size. Increasing stress ratio also reduced crack deflection and crack closure, and thus decreased the FCG resistance. The relevant mechanisms were discussed in terms of Kmax and crack closure effect.
AB - The influence of microstructures (β grain size, α/β colony size and width of α lath) and stress ratios (R = 0.1, 0.7) on fatigue crack growth (FCG) behavior of beta-annealed Ti624x (x = 2, 4 and 6) alloys was investigated. The FCG rate curves, crack paths, and the plastic zone ahead of the crack tip were compared. The reducing FCG resistance from Ti6242 to Ti6246 was found to stem from decreasing α/β colony size. Increasing stress ratio also reduced crack deflection and crack closure, and thus decreased the FCG resistance. The relevant mechanisms were discussed in terms of Kmax and crack closure effect.
KW - Crack closure
KW - Fatigue crack growth
KW - Microstructure
KW - Stress ratio
KW - Ti624x
UR - http://www.scopus.com/inward/record.url?scp=84948463025&partnerID=8YFLogxK
U2 - 10.1016/j.ijfatigue.2015.10.009
DO - 10.1016/j.ijfatigue.2015.10.009
M3 - Article
AN - SCOPUS:84948463025
VL - 83
SP - 150
EP - 160
JO - International Journal of Fatigue
JF - International Journal of Fatigue
SN - 0142-1123
ER -