Segregation of alloying elements to stabilize θ′ phase interfaces in Al-Cu based alloys
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Declaration of Competing Interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Acknowledgments
This work has been financed by the Russian Science Foundation (grant 18-12-00366) and has been carried out using computing resources of the Federal collective usage center Complex for Simulation and Data Processing for Mega-science Facilities at NRC “Kurchatov Institute”, http://ckp.nrcki.ru/.
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2022, Materials Science and Engineering: ACitation Excerpt :Another type of micro-alloying elements, such as Sc [17,18], Zr [17,19], and Mn [17,19] are used to improve the heat-resistance of Al–Cu alloy. There are two routes: (1) forming new precipitates with high thermal-stability, such as Al3Sc [20], Al3Zr [21,22] or Al20Cu2Mn3 (T phase) [22,23]; (2) improving the thermal-stability of θ′ phase through forming an atomic layer of Sc, Zr or Mn at the interface of Al/θ′ [19,24,25] that can hinder the migration of Cu atoms. Dorin et al. [26] reported that the increment of the peak-aged strength from the refinement effect of minor addition of Sc + Zr on the meta-stable precipitates of θ′ phase is higher than that from the dispersoids strengthening effect of Al3(Sc,Zr) particles in Al–Cu alloy.