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Einfluss des festen Lösungszustandes von Zirkonium und Al 3 Zr (L1 2 )‐Ausscheidungen auf das Rekristallisationsverhalten der Legierung Al‐0,2 wt.%Zr
Author(s) -
Zhu C.,
Zhu Q.F.,
Ban C.Y.,
Jia T.,
Wang G.S.,
Zhao Z.H.
Publication year - 2020
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.202000035
Subject(s) - recrystallization (geology) , materials science , zirconium , alloy , annealing (glass) , aluminium , metallurgy , zirconium alloy , solid solution , biology , paleontology
Effect of homogenization annealing on the existence form of zirconium in Al‐0.2wt.%Zr alloy and effect of various existence form of zirconium on the recrystallization behavior of Al‐0.2wt.%Zr cold‐rolled (total deformation is 92.8 %) sheet are studied. The results show that large numbers of nearly spherical Al 3 Zr (L1 2 ) nanoparticles precipitated from aluminum matrix after homogenizing at 475 °C for 24 h. Moreover, due to the precipitation of Al 3 Zr particles, the hardness and electrical conductivity of the as‐cast Al‐0.2wt.%Zr alloy is increased from 25.1±0.5 HV 3 and 54.0±0.2 %IACS to 28.6±0.7 HV 3 and 56.2±0.1 %IACS, respectively. Hence, zirconium exists as solid solution state in the as‐cast Al‐0.2wt.%Zr alloy and metastable Al 3 Zr phase in the homogenized alloy. Moreover, the recrystallization temperature of the pure aluminum without addition of zirconium is 300 °C, while the recrystallization temperature of the Al‐0.2wt.%Zr alloy without and with homogenization is about 350 °C and 400 °C, respectively. Obviously, the solid solution state of zirconium has certain effect on retarding the recrystallization of aluminum alloy, while the nanometer Al 3 Zr particles can inhibit the recrystallization of aluminum alloy effectively and increase the recrystallization temperature remarkably.