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- W2378624248 abstract "Al-6Zn-2Mg alloys containing different contents of Er were prepared by steel mould casting. The form of Er in Al-6Zn-2Mg alloy and its refinement mechanism were studied with OM, SEM, TEM and EDS. The results show that Er exists in three forms: resolved in α(Al based solid solution, forming primary phase Al_3Er or eutectic compound in grain boundary, precipitated in the form of the fine Al_3Er particles. The addition of Er can be capable of refining grain to a certain degree: the dendritical arm space of the alloy containing less than 0.25% Er becomes small, however the grain seldom keeps the same size. The effect of grain refinement becomes remarkably great when containing up to 0.4% Er. The grain becomes rather fine when the content of Er is more than 0.4%. The refinement mechanism of Er addition depends on the content of Er. The refinement mechanism of the alloy containing less Er conforms to the traditional theory for rare-earth aluminum alloy. The grain of the alloy containing more Er is refined because of the formation of primary Al_3Er, and the primary Al_3Er can act as heterogeneous nucleus." @default.
- W2378624248 created "2016-06-24" @default.
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- W2378624248 date "2004-01-01" @default.
- W2378624248 modified "2023-09-26" @default.
- W2378624248 title "Form and refinement mechanism of element Er in Al-Zn-Mg alloy" @default.
- W2378624248 hasPublicationYear "2004" @default.
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