Shear-driven high-temperature fatigue crack growth in polycrystalline alumina

Journal Article · Tue Oct 31 23:00:00 EST 1995 · Acta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-7151(95)00062-Z· OSTI ID:131510

Huang, C H; Shang, J K ^[1]

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

High-temperature crack growth behavior of a polycrystalline alumina was examined under Mode-I tension-tension cyclic loading. Locally at the crack tip, the fatigue crack was found to advance in shear by frictional sliding of grains on alternating sets of planes of the maximum shear. Evidence of a shear-driven crack growth was given in terms of topological and morphological analyses of the fatigue crack growth kinetics. Based on experimental observations, a ne model of fatigue crack growth by alternating shear was proposed.

• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76ER01198
• OSTI ID: 131510
• Journal Information: Acta Metallurgica et Materialia, Journal Name: Acta Metallurgica et Materialia Journal Issue: 11 Vol. 43; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CRACK PROPAGATION
FATIGUE
FRACTURE MECHANICS
FRACTURE PROPERTIES
GRAIN SIZE
KINETICS
MORPHOLOGY
SLIDING FRICTION
TEMPERATURE DEPENDENCE
TOPOLOGY