An investigation of cleavage fracture in Mn-containing gamma-based titanium aluminides
Book
·
OSTI ID:293142
- Ohio State Univ., Columbus, OH (United States). Dept. of Materials Science and Engineering
The results of a recent study of cleavage fracture are presented for ternary Mn-containing gamma-based titanium aluminides with duplex {alpha}{sub 2} + {gamma} microstructures. Yield and ultimate tensile strength and fracture toughness are shown to exhibit an inverse square root (Hall-Petch) dependence on the average grain size in these alloys. The Hall-Petch dependence is rationalized using an initiation-controlled fracture model. The high incidence of intergranular cleavage in Mn-containing alloys is shown to occur primarily as a result of the preferential segregation of Mn to grain boundaries.
- OSTI ID:
- 293142
- Report Number(s):
- CONF-970980--; ISBN 0-87339-381-3
- Country of Publication:
- United States
- Language:
- English
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