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
  • [31] Ternary eutectic growth and associated tensile properties of directionally solidified Al87Si11Ni2 alloy
    Zhu, Xiannian
    Chang, Jian
    Yan, Pengxu
    Lin, Maojie
    Wang, Xin
    Wei, Bingbo
    Materials Letters, 2024, 364
  • [32] Influence of Gravity on Microstructure of Directionally Solidified Al-Ni Eutectic Alloy
    Matsunaga, Takayoshi
    Kadoi, Kota
    Nakae, Hideo
    JOURNAL OF THE JAPAN INSTITUTE OF METALS, 2010, 74 (04) : 231 - 236
  • [33] INFLUENCE OF GROWTH RATE ON MICROSTRUCTURE AND MICROINDENTATION HARDNESS OF DIRECTIONALLY SOLIDIFIED TIN-CADMIUM EUTECTIC ALLOY
    Cadirli, E.
    Kaya, H.
    Gunduz, M.
    SURFACE REVIEW AND LETTERS, 2009, 16 (02) : 191 - 201
  • [34] Effect of Zn addition on microstructure and mechanical properties of an Al–Mg–Si alloy
    Lizhen Yan
    Yongan Zhang
    Xiwu Li
    Zhihui Li
    Feng Wang
    Hongwei Liu
    Baiqing Xiong
    ProgressinNaturalScience:MaterialsInternational, 2014, 24 (02) : 97 - 100
  • [35] Mechanical properties and microstructure of Mg-Al-Zn-Si-base alloy
    Yuan, GY
    Liu, MP
    Ding, WJ
    Inoue, A
    MATERIALS TRANSACTIONS, 2003, 44 (04) : 458 - 462
  • [36] Microstructure and corrosion resistance of directionally solidified Mg-2 wt.% Zn alloy
    Jia, Hongmin
    Feng, Xiaohui
    Yang, Yuansheng
    CORROSION SCIENCE, 2017, 120 : 75 - 81
  • [37] Influence of upward and horizontal growth direction on microstructure and microhardness of an unsteady-state directionally solidified Al-Cu-Si alloy
    Maraes de Araujo, Raimundo Lucivaldo
    Lopes Kikuchi, Rafael Hideo
    Barros, Andre Santos
    Gomes, Laercio Gouvea
    da Conceicao Moutinho, Daniel Joaquim
    Goncalves, Fernando de Almeida
    Seabra Moreira, Antonio Luciano
    Lima da Rocha, Otavio Fernandes
    MATERIA-RIO DE JANEIRO, 2016, 21 (01): : 261 - U277
  • [38] MICROSTRUCTURE OF DIRECTIONALLY SOLIDIFIED ALLOYS AL-SI AND AL-NIAL3
    ZWILLING, G
    NOWOTNY, H
    ZEITSCHRIFT FUR METALLKUNDE, 1971, 62 (08): : 609 - &
  • [39] Effect of growth rate on microstructure and mechanical properties in a directionally solidified Nb-silicide base alloy
    Tian, Y. X.
    Guo, J. T.
    Cheng, G. M.
    Sheng, L. Y.
    Zhou, L. Z.
    He, L. L.
    Ye, H. Q.
    MATERIALS & DESIGN, 2009, 30 (06) : 2274 - 2277
  • [40] Effect of growth rate on microstructure and microstructure evolution of directionally solidified Nb-Si alloys
    Sekito, Yoshihito
    Miura, Seiji
    Ohkubo, Kenji
    Mohri, Tetsuo
    Sakaguchi, Norihito
    Watanabe, Seiichi
    Kimura, Yoshisato
    Mishima, Yoshinao
    ADVANCED INTERMETALLIC-BASED ALLOYS FOR EXTREME ENVIRONMENT AND ENERGY APPLICATIONS, 2009, 1128 : 281 - +
12345