ENHANCED FATIGUE-CRACK GROWTH RESISTANCE AT ELEVATED-TEMPERATURE IN TIC TI-6AL-4V COMPOSITE - MICROCRACK-INDUCED CRACK CLOSURE/

Authors
LIU G ZHU D SHANG JK
Citation
G. Liu et al., ENHANCED FATIGUE-CRACK GROWTH RESISTANCE AT ELEVATED-TEMPERATURE IN TIC TI-6AL-4V COMPOSITE - MICROCRACK-INDUCED CRACK CLOSURE/, Metallurgical and materials transactions. A, Physical metallurgy andmaterials science, 26(1), 1995, pp. 159-166
Citations number
25
Categorie Soggetti
Metallurgy & Metallurigical Engineering","Material Science
Journal title
Metallurgical and materials transactions. A, Physical metallurgy andmaterials science → ACNP
ISSN journal
10735623
Volume
26
Issue
1
Year of publication
1995
Pages
159 - 166
Database
ISI
SICI code
1073-5623(1995)26:1<159:EFGRAE>2.0.ZU;2-G
Abstract
The fatigue crack growth behavior of TiC/Ti-alloy composite was examin ed at 450 degrees C and compared to the room-temperature behavior. Con trary to the temperature-dependent fatigue crack growth behavior of th e monolithic alloy, fatigue crack growth resistance of the composite w as improved at the elevated temperature. At 450 degrees C, the fatigue threshold of the composite was found to be 50 pet higher than at room temperature. Such an improved fatigue crack growth resistance is show n to result from extensive microcracking of reinforcing particles, whi ch promotes fatigue crack closure at the elevated temperature.