The microstructures of five Al Mn Mg alloys with different Mn, Si and Fe contents were investigated in as cast and homogenized states. The influences of chemical composition and homogenizing process on the microstruct...The microstructures of five Al Mn Mg alloys with different Mn, Si and Fe contents were investigated in as cast and homogenized states. The influences of chemical composition and homogenizing process on the microstructure were studied. The results show that the morphology of the primary second particles are not influenced by the variation of Mn, Si and Fe level, and the amount of the primary α phase, the α precipitates and Mg 2Si phase are enhanced by the addition of Si; The average size of primary intermetallic particles reduces and the volume fraction of them decreases slightly with the increase in homogenization temperature and time; However, the volume fraction of primary secondary particles is increased by adding more Mn, Si and Fe elements in alloys. Moreover, a new MgSiCu rich eutectic in the as cast ingot has been found.展开更多
基金National Natural Science Foundation of China(Nos.52001140,52274363)Guangdong Basic Applied Basic Research Foundation,China(Nos.2022A1515010558,2022A1515011597,2022A1515240065)。
基金The present work is financially supported by the National Key Research and Development Program of China(No.2020YFB0311203)the Natural Science Foundation of Henan,China(No.202300410005).
文摘The microstructures of five Al Mn Mg alloys with different Mn, Si and Fe contents were investigated in as cast and homogenized states. The influences of chemical composition and homogenizing process on the microstructure were studied. The results show that the morphology of the primary second particles are not influenced by the variation of Mn, Si and Fe level, and the amount of the primary α phase, the α precipitates and Mg 2Si phase are enhanced by the addition of Si; The average size of primary intermetallic particles reduces and the volume fraction of them decreases slightly with the increase in homogenization temperature and time; However, the volume fraction of primary secondary particles is increased by adding more Mn, Si and Fe elements in alloys. Moreover, a new MgSiCu rich eutectic in the as cast ingot has been found.
