fig4
Figure 4. Microstructure of laser welded joint under different element composition: (A1) Base Ti-6Al-4V with corresponding (A2 and A3) high-magnification SEM and TEM; (B1) Ti-6Al-4V-0.5O-2.3Fe with corresponding (B2 and B3) high-magnification SEM; (C1) Ti-6Al-4V-0.54O-3.7Fe with corresponding (C2 and C3) high-magnification SEM.








