The influence of growth rate on the microstructure and properties of directionally solidified Zn-11Al-3Mg-0.2Si alloy

被引：0
|
作者：
Li, Jipeng [1 ,2 ]
Peng, Peng [3 ]
Yan, Xiantao [3 ]
Wang, Jin [2 ]
Cheng, Shusen [1 ]
机构：
[1] University of Science and Technology Beijing, Beijing,100083, China
[2] Gansu Jiu Steel Group Hongxing Iron and Steel Co.,Ltd, Jiayuguan,735100, China
[3] School of Materials and Energy, Lanzhou University, Lanzhou,730000, China
来源：
Journal of Alloys and Compounds | 2024年 / 1004卷
关键词：
Zn-11Al-3Mg-0.2Si alloy was prepared via directional solidication with growth rates ranging from 1 to 200 μm/s. The growth rate dependence of the microstructure; corrosion resistance and microhardness of the alloy were investigated in detail. The results show that the microstructure of the alloy consists mainly of the primary Al phase and MgZn2 + Al binary eutectic at the growth rates of 1–5 μm/s. This can be attributed to the further growth of the Al and MgZn2 phases formed in the mushy zone during the heat-holding period. However; a microstructure of primary Al phase and Zn+ Al+Mg2Zn11 ternary eutectic was obtained when the growth rate is 10 μm/s and higher. The reason for the microstructural change is that the increase in undercooling caused by the growth rate at the solid-liquid interface promotes the nucleation of the Zn+Al+Mg2Zn11 ternary eutectic phase instead of MgZn2 phase. Electrochemical and weightless corrosion experiments show that the alloy obtained at the growth rate of 10 μm/s possesses the best corrosion resistance. The ternary eutectic structure facilitates the formation of dense corrosion products; while the grain refinement caused by the increase in growth rate will aggravate intergranular corrosion. The nanoindentation tests demonstrate that the microhardness of each phase increases with grain refinement; and the microhardness of MgZn2 phase is much higher than that of the ternary eutectic phase. Under the combined effects of intermetallic compound phase strengthening and grain refinement strengthing; the alloy obtained at the growth rate of 5 μm/s shows the highest microhardness. © 2024 Elsevier B.V;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Journal article (JA)
引用
收藏
相关论文
共 50 条
  • [41] Effect of growth rate on characteristic lengths of microstructure in directionally solidified Ti-46Al-2Cr-2Nb-0.2B alloy
    Zhang Yuan
    Li Xinzhong
    Guo Jingjie
    Su Yanqing
    Fu Hengzhi
    CHINA FOUNDRY, 2013, 10 (05) : 304 - 309
  • [42] Influence of Thermal Parameters, Microstructure, and Morphology of Si on Machinability of an Al-7.0 wt.% Si Alloy Directionally Solidified
    Silva, Cassio A. P.
    Leal, Layo R. M.
    Guimaraes, Emanuelle C.
    Junior, Paulo M.
    Moreira, Antonio L.
    Rocha, Otavio L.
    Silva, Adrina P.
    ADVANCES IN MATERIALS SCIENCE AND ENGINEERING, 2018, 2018
  • [43] Influence of cooling rate on the microstructure and mechanical properties of Al-Cu-Li-Mg-Zn alloy
    Yang, Qingbo
    Shi, Wenjing
    Wang, Miao
    Jia, Lina
    Wang, Wenbo
    Zhang, Hu
    JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, 2023, 25 : 3151 - 3166
  • [44] Determination of Microstructure, Mechanical, Electrical and Thermal Properties of The Directionally Solidified Al-Si-Co Ternary Alloy
    Aker, Aynur
    Kaya, Hasan
    MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, 2016, 19 (01): : 243 - 251
  • [45] High cooling rate cells, dendrites, microstructural spacings and microhardness in a directionally solidified Al-Mg-Si alloy
    Brito, Crystopher
    Reinhart, Guillaume
    Nguyen-Thi, Henri
    Mangelinck-Noel, Nathalie
    Cheung, Noe
    Spinelli, Jose E.
    Garcia, Amauri
    JOURNAL OF ALLOYS AND COMPOUNDS, 2015, 636 : 145 - 149
  • [46] Effect of Si addition on microstructure and mechanical properties of Al-Mg-Si-Zn alloy
    Fan-bo Meng
    Hong-jun Huang
    Xiao-guang Yuan
    Ze-wen Cui
    Xian-lei Hu
    China Foundry, 2020, 17 : 15 - 20
  • [47] Effect of Si addition on microstructure and mechanical properties of Al-Mg-Si-Zn alloy
    Meng, Fan-bo
    Huang, Hong-jun
    Yuan, Xiao-guang
    Cui, Ze-wen
    Hu, Xian-lei
    CHINA FOUNDRY, 2020, 17 (01) : 15 - 20
  • [48] Effect of Si addition on microstructure and mechanical properties of Al-Mg-Si-Zn alloy
    Fan-bo Meng
    Hong-jun Huang
    Xiao-guang Yuan
    Ze-wen Cui
    Xian-lei Hu
    China Foundry, 2020, 17 (01) : 15 - 20
  • [49] Influence of Mn addition on the microstructure and mechanical properties of a directionally solidified γ-TiAl alloy
    Wang, Qiang
    Ding, Hongsheng
    Zhang, Hailong
    Chen, Ruirun
    Guo, Jingjie
    Fu, Hengzhi
    MATERIALS CHARACTERIZATION, 2018, 137 : 133 - 141
  • [50] Effect of growth velocity on microstructure and mechanical properties of directionally solidified 7075 alloy
    Cadirli, Emin
    Nergiz, Emel
    Kaya, Hasan
    Buyuk, Ugur
    Sahin, Mevlut
    Gunduz, Mehmet
    INTERNATIONAL JOURNAL OF CAST METALS RESEARCH, 2020, 33 (01) : 11 - 23
12345