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- W1966746347 abstract "Abstract The principal metallurgical factor leading to embrittlement of a rapid solidification-powder metallurgy (RS-PM) AlFeVSi alloy after high temperature exposure at 480 °C was identified. Although the RS-PM AlFeVSi alloy showed excellent high temperature stability compared to an ingot metallurgy 2219 aluminium alloy, the AlFeVSi alloy exhibited a decreasing fracture toughness together with yield strength and ductility after high temperature exposure. In situ scanning electron microscopy observations of crack-opening processes showed that brittle cleavage-like fracture occurred at the coarse Al 13 Fe 4 particles that were formed during exposure at 480 °C. This led to the reduction in fracture toughness of the AlFeVSi alloy. Fracture toughness tests were interpreted using a simplified ductile fracture initiation model based on the assumption that crack extension initiates at a certain critical strain over a microstructurally significant critical distance. This model correlated microstructural factors with fracture toughness and confirmed that the presence of coarse Al 13 Fe 4 particles was responsible for the embrittlement phenomenon in the AlFeVSi alloy after high temperature exposure." @default.
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- W1966746347 date "1991-10-01" @default.
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- W1966746347 title "Correlation of microstructure and fracture toughness of a rapid solidification-powder metallurgy AlFeVSi alloy" @default.
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- W1966746347 doi "https://doi.org/10.1016/0921-5093(91)90802-t" @default.
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