Lawrence Berkeley National Laboratory
Fracture and fatigue resistance of Mo-Si-B alloys for
ultrahigh-temperature structural applications
- Author(s): Kruzic, J.J.
- Schneibel, J.H.
- Ritchie, R.O.
- et al.
Fracture and fatigue-crack growth properties are examined for a series of Mo-Mo3Si-Mo5SiB2 containing alloys, which utilize a continuous a-Mo matrix to achieve unprecedented room-temperature fracture resistance (>20 MPaAm). Mechanistically, these properties are explained in terms of toughening by crack trapping and crack bridging by the more ductile a-Mo phase.