TY - JOUR
T1 - Excellent creep properties of Mg-Zn-Cu-Gd-based alloy strengthened by quasicrystals and Laves phases
AU - Yuan, Guangyin
AU - Kato, Hidemi
AU - Amiya, Kenji
AU - Inoue, Akihisa
N1 - Funding Information:
One of the authors (Guangyin Yuan) gratefully acknowledges the Japanese Society for the Promotion of Science(JSPS) for providing financial support to carry out the present work. The authors also acknowledge the contributions to the high-temperature Vickers hardness test by Mr. K.Sasamori (IMR, Tohoku University, Japan).
PY - 2005/5
Y1 - 2005/5
N2 - A new type of Mg-Zn-Cu-Gd-based alloy strengthened by quasicrystal and Laves phase was developed. This alloy exhibits much better creep properties compared to AE42(Mg-4 wt% Al-2 wt% rare-earth) alloy, which is the benchmark creep-resistant magnesium die-casting alloy under the compressive creep condition of 180 °C and 80 MPa. The new alloy also exhibits high room-temperature mechanical properties close to that of AZ91 alloy. The good mechanical properties are attributed to the special microstructure; the thermally stable icosahedral quasicrystals phase (i-phase) and Laves phase distributed along the grain boundary as a hard skeleton, and some fine B1′ precipitates distributed homogenously on the matrix. The dislocation morphology after the creep test was studied, and the strengthening mechanism was proposed.
AB - A new type of Mg-Zn-Cu-Gd-based alloy strengthened by quasicrystal and Laves phase was developed. This alloy exhibits much better creep properties compared to AE42(Mg-4 wt% Al-2 wt% rare-earth) alloy, which is the benchmark creep-resistant magnesium die-casting alloy under the compressive creep condition of 180 °C and 80 MPa. The new alloy also exhibits high room-temperature mechanical properties close to that of AZ91 alloy. The good mechanical properties are attributed to the special microstructure; the thermally stable icosahedral quasicrystals phase (i-phase) and Laves phase distributed along the grain boundary as a hard skeleton, and some fine B1′ precipitates distributed homogenously on the matrix. The dislocation morphology after the creep test was studied, and the strengthening mechanism was proposed.
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U2 - 10.1557/JMR.2005.0156
DO - 10.1557/JMR.2005.0156
M3 - Article
AN - SCOPUS:29144438048
SN - 0884-2914
VL - 20
SP - 1278
EP - 1286
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 5
ER -