Dependence of microstructure and mechanical properties on solidification condition of directionally solidified Zn-55Al-1.6Si alloys  

作　　者：Ji-peng Li De-gao Qiao Jian Li Peng Peng Kai-di Hu Xian-tao Yan Shu-sen Cheng Yuan-li Xu 

机构地区：[1]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]Gansu Jiu Steel Group Hongxing Iron and Steel Co.,Ltd.,Jiayuguan 735100,Gansu,China [3]School of Materials and Energy,Lanzhou University,Lanzhou 730000,China

出　　处：《China Foundry》2024年第6期685-692,共8页中国铸造（英文版）

基　　金：funded by the Key Science and Technology Projects of Gansu Province(Grant No.22ZD6GB019);the Gansu Key Research and Development Project(Grant No.23YFGA0003);the Gansu Provincial Joint Research Fund(Grant No.23JRRC0004);the Fundamental Research Funds for the Central Universities(Grant No.lzujbky-2022-ey15);the fund of the State Key Laboratory of Solidification Processing in NPU(Grant No.SKLSP202204).

摘　　要：In this study,directional solidification was utilized to explore the relationship between microstructure,mechanical properties,and withdrawal speeds of Zn-55Al-1.6Si alloys.In order to assess the characteristics of Zn-55Al-1.6Si alloys,both the microstructure and mechanical properties were thoroughly analyzed.This involved conducting room temperature tensile tests on samples with different withdrawal speeds(5,10,100,200,and 400μm·s^(-1)).The results reveal that both the as-cast alloy and samples after directional solidification are composed of zinc,aluminum,and silicon phases.As the withdrawal speed increases,an evident decrease in the size of the primary dendrites is observed.The results of tensile experiments show that Zn-55Al-1.6Si alloys after directional solidification exhibit brittle fracture characteristics,both the tensile strength and elongation of the alloys increase with withdrawal speed.

关 键 词：Zn-55Al-1.6Si alloy directional solidification microstructure mechanical properties 

分 类 号：TG146.13[一般工业技术—材料科学与工程]