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

Journal Article · Sat Dec 31 23:00:00 EST 1994 · 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), Journal Name: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States) Vol. 26:1; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

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