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- W2783123436 abstract "Tensile creep resistance of a high-pressure die-cast Mg–4Al–4RE–0.3Mn (AE44) alloy was significantly deteriorated after substituting part RE with Ca. According to traditional power-law creep theories, the stress exponent and the activation energy were revealed as 6 and 217 kJ/mol, which indicate inconsistent mechanisms of dislocation climb and dislocation cross-slip, respectively. Then, transmission electron microscopy (TEM) observations illustrate that dislocation substructures developed during creep are variational with precipitate characters in α-Mg grains, creep stress levels and creep temperatures. Therefore, both stress exponent and activation energy obtained from traditional power-law creep theories are meaningless for the AE44 alloy with part RE substituted by Ca. Finally, the shrink of C36 phase lattice, the precipitation of Al2Ca precipitates and the denuded zones were observed in the crept samples, and all of them are responsible for the deterioration in creep resistance of the AEX422 alloy. Also, this paper provides insight into alloy design principles for further development of creep-resistance Mg–Al–RE based alloys." @default.
- W2783123436 created "2018-01-26" @default.
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- W2783123436 date "2018-02-01" @default.
- W2783123436 modified "2023-10-18" @default.
- W2783123436 title "Deteriorated tensile creep resistance of a high-pressure die-cast Mg–4Al–4RE–0.3Mn alloy induced by substituting part RE with Ca" @default.
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- W2783123436 doi "https://doi.org/10.1016/j.msea.2018.01.027" @default.
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