Enhanced fatigue crack growth resistance at elevated temperature in TiC/Ti-6Al-4V composite: Microcrack-induced crack closure

Journal Article · Sun Jan 01 00:00:00 EST 1995 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

DOI:https://doi.org/10.1007/BF02669801· OSTI ID:6604922

Liu, G; Zhu, D; Shang, J K ^[1]

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1. Univ. of Illinois, Urbana, IL (United States). Dept. of Materials Science and Engineering

The fatigue crack growth behavior of TiC/Ti-alloy composite was examined at 450 C and compared to the room-temperature behavior. Contrary to the temperature-dependent fatigue crack growth behavior of the monolithic alloy, fatigue crack growth resistance of the composite was improved at the elevated temperature. At 450 C, the fatigue threshold of the composite was found to be 50 pct higher than at room temperature. Such an improved fatigue crack growth resistance is shown to result from extensive microcracking of reinforcing particles, which promotes fatigue crack closure at the elevated temperature.

• OSTI ID: 6604922
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Vol. 26:1; ISSN 0360-2133
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CRACK PROPAGATION
FATIGUE
COMPOSITE MATERIALS
TITANIUM BASE ALLOYS
VANADIUM ALLOYS
EXPERIMENTAL DATA
TEMPERATURE RANGE 0400-1000 K
ALLOYS
DATA
INFORMATION
MATERIALS
MECHANICAL PROPERTIES
NUMERICAL DATA
TEMPERATURE RANGE
TITANIUM ALLOYS
360603* - Materials- Properties