E-resources
Peer reviewed
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Xu, C.; Nakata, T.; Oh-ishi, K.; Homma, T.; Ozaki, T.; Kamado, S.
Scripta materialia, October 2017, 2017-10-00, Volume: 139Journal Article
Only trace Ca addition to the Mg–2Gd–0.5Zn–0.2Zr (at.%) alloy leads to the precipitation of Guinier-Preston (GP) zones and remarkably improves the creep resistance at elevated temperatures. The Mg–2Gd–0.5Zn–0.4Ca–0.2Zr alloy exhibits a minimum creep rate of 5.75×10−8s−1 tested at 250°C and 110MPa, its superior creep resistance is attributed to the precipitation of dense GP zones on the basal plane, increment in number density of refined β phases on the prismatic plane of the α-Mg matrix, narrow precipitate free zones (PFZs) and strengthened long period stacking ordered (LPSO) phases by trace concentration of Ca. Display omitted
