摘要
The microstructures and mechanical properties of the rolled AZ61 alloys containing different contents of Y (0, 0.5, 0.9, 1.4%Y respectively) were studied. Phase analysis was performed by X-ray diffraction(XRD). Microstructures of experimental materials were observed by optical microscope(OM) and scanning electron microscope(SEM) equipped with energy dispersive spectrometer(EDS). The results show that the alloys with variable Y contents all contain a second-phase Al2Y. The amount of Al2Y increases with the increasing of Y content while that of Mg17Al12 decreases. Moreover, Y refines the microstructures of as-cast and rolled alloys. The finest average grain size is obtained in the alloy containing 0.9%Y with the best mechanical properties. When the Y content is up to 1.4%, Al2Y phase in the alloy coarsens, which leads to the drop of tensile strength.
The microstructures and mechanical properties of the rolled AZ61 alloys containing different contents of Y （0, 0.5, 0.9, 1.4%Y respectively） were studied. Phase analysis was performed by X-ray diffraction（XRD）. Microstructures of experimental materials were observed by optical microscope（OM） and scanning electron microscope（SEM） equipped with energy dispersive spectrometer（EDS）. The results show that the alloys with variable Y contents all contain a second-phase Al2Y. The amount of Al2Y increases with the increasing of Y content while that of Mg17Al12 decreases. Moreover, Y refines the microstructures of as-cast and rolled alloys. The finest average grain size is obtained in the alloy containing 0.9%Y with the best mechanical properties. When the Y content is up to 1.4%, Al2Y phase in the alloy coarsens, which leads to the drop of tensile strength.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2006年第5期1053-1058,共6页
Transactions of Nonferrous Metals Society of China
基金
Project(2004GK1008-2) supported by the Science and Technology Program of Hunan Province, China
Project supported by the Key Laboratory for Nonferrous Metal of Education Department of Hunan Province, China
关键词
AZ61合金
稀土
热轧
显微结构
机械性能
镁合金
AZ61 alloy
rare earth
yttrium
hot rolling
microstructure
mechanical properties
