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Influences of microstructure and orientation on fracture toughness of intermetallic phase Al 2 Cu‐based alloy under directional solidification
Author(s) -
Gao K.,
Li S.,
Song S.,
Zhang R.,
Guo X.,
Fu H.
Publication year - 2016
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12388
Subject(s) - intermetallic , materials science , microstructure , dendrite (mathematics) , fracture toughness , alloy , directional solidification , composite material , phase (matter) , metallurgy , brittleness , fracture (geology) , morphology (biology) , toughness , geometry , mathematics , chemistry , organic chemistry , biology , genetics
The influences of microstructures and orientations on fracture toughness of intermetallic phase Al 2 Cu‐based alloys during different directionally solidified rates were investigated. With solidified rates increasing, the patterns of Al 2 Cu phase dendrite turned from faceted V‐shaped morphology to elongated plate‐shaped morphology and discontinuous complex morphology in longitudinal section. Moreover, the deviation angle between the growth direction of Al 2 Cu dendrite and the heat flow direction was increasing. Because of fine grain toughening and crack propagation path deflected by orientation, the fracture toughness of Al 2 Cu‐based alloy was improved. The experimental results showed that improving the brittleness could be well achieved under higher directionally solidified rate.