Structure–property relationship of a spray formed Al–Y–Ni–Co alloy

The structure–property relationship of a spray formed Al–Y–Ni–Co alloy with two sets of processing conditions was investigated. Significant differences in tensile strength, yield strength, and high temperature ductility were observed with respect to the microstructural changes. Fracture toughness va...

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Bibliographic Details
Published in:Acta materialia 2003-10, Vol.51 (17), p.5199-5209
Main Authors: Golumbfskie, W.J, Amateau, M.F, Eden, T.J, Wang, J.G, Liu, Z.K
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fatigue, corrosion fatigue, embrittlement, cracking, fracture and failure
Fatigue, embrittlement, and fracture
Fracture toughness
High temperature aluminium alloy
Intermetallic particle
Materials science
Metals. Metallurgy
Physics
Spray forming
Treatment of materials and its effects on microstructure and properties
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Summary:The structure–property relationship of a spray formed Al–Y–Ni–Co alloy with two sets of processing conditions was investigated. Significant differences in tensile strength, yield strength, and high temperature ductility were observed with respect to the microstructural changes. Fracture toughness values were determined for both sets of specimens and found to be 7.5 and 5.8 MPa·m 1/2, respectively. Three intermetallic phases were observed in the matrix and constitute a volume fraction of approximately 75%. It is believed that the specimens failed during fracture toughness testing by the mechanism of cleavage, observed in the Al 3Y intermetallic particles.
ISSN:1359-6454
1873-2453
DOI:10.1016/S1359-6454(03)00383-5