Microstructure and Tensile Properties of Mg-Y-Er-Ni Alloy with Long Period Stacking Ordered Phases

被引：0

作者：

Ouyang K. ^{[1
]}

Zhou D. ^{[1
]}

Yang Y. ^{[1
]}

Zhang L. ^{[1
]}

机构：

[1] School of Aeronautical Manufacture Engineering, Nanchang Hangkong University, Nanchang

来源：

Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2023年 / 37卷 / 09期

基金：

中国国家自然科学基金;

关键词：

LPSO phase; metallic materials; Mg-Y-Er-Ni alloy; microstructure; tensile property;

D O I：

10.11901/1005.3093.2022.347

中图分类号：

学科分类号：

摘要：

Mg-alloys Mg97Y1.5Er0.5Ni1, Mg97Y1Er1Ni1 and Mg97Y0.5Er1.5Ni1 were fabricated by gravity casting method. Then the microstructure and tensile properties of the as-cast and solution-treated (520℃, 12 h) alloys were investigated by means of SEM with EDS, TEM and electronic universal testing machine. The results show that the as-cast alloys Mg97Y1.5Er0.5Ni1, Mg97Y1Er1Ni1 and Mg97-Y0.5Er1.5Ni1 are mainly composed of α-Mg matrix and 18R-LPSO phase. The grain size of α-Mg in the as-cast Mg97Y1Er1Ni1 alloy is the smallest and the volume fraction of LPSO phase is the highest among all the three alloys. Moreover, the as-cast Mg97Y1Er1Ni1 alloy presents the finest particles of LPSO phase and they also distribute much uniformly. Therefore, the as-cast Mg97Y1Er1Ni1 alloy shows the best tensile properties. After solid solution treatment at 520℃ for 12 h, the three alloys Mg97Y1.5-Er0.5Ni1, Mg97Y1Er1Ni1 and Mg97Y0.5Er1.5Ni1 all consist mainly of α -Mg matrix and 18R-LPSO phase. Inside the grains of the solution-treated Mg97Y1.5Er0.5Ni1 alloy, it is found that there are some stacking faults, which does not have a complete periodicity. The tensile properties of the three solution-treated alloys are all enhanced compared with those of the as-cast alloys. © 2023 Chinese Journal of Materials Research. All rights reserved.

引用

页码：697 / 705

页数：8

共 26 条

[1]

Sun H, Chen M, Cheng M, Et al., Recrystallization and texture of magnesium alloy sheet during warm rolling based on multi-scale model, Chin. J. Mater. Res, 35, 5, (2021)

[2]

Wang D J, Zhang M Q, Ji Z S, Et al., Process and properties of graphene reinforced magnesium matrix composites prepared by in-situ method, Chin. J. Mater. Res, 35, 6, (2021)

[3]

Liu Y, Kang R, Feng X H, Et al., Microstructure and mechanical properties of Mg-Al-Ca-Mn-Zn wrought magnesium alloy, Chin. J. Mater. Res, 36, 1, (2022)

[4]

Gu J Q, Tang W N, Xu S W., Evolution of tensile deformation microstructure of Mg-0.4Zn magnesium alloy extruded sheet, Chin. J. Mater. Res, 37, 7, (2021)

[5]

Kawamura Y, Hayashi K, Inoue A, Et al., Rapidly solidified powder metallurgy Mg97ZnlY2 alloys with excellent tensile yield strength above 600 MPa, Mater. Trans. JIM, 42, (2001)

[6]

Abe E, Kawamura Y, Hayashi K, Et al., Long-period ordered structure in a high-strength nanocrystalline Mg-1at% Zn-2at% Y alloy studied by atomic-resolution Z-contrast STEM [J], Acta Mater, 50, (2002)

[7]

Luo Z, Zhang S., High-resolution electron microscopy on the XMg12ZnY phase in a high strength Mg-Zn-Zr-Y magnesium alloy, J. mater. Sci. lett, 19, 9, (2000)

[8]

Chuang W S, Huang J C, Lin P H, Et al., Deformation mechanisms and mechanical properties of (0001) Mg-Zn-Y 18R-LPSO single crystals, J. Alloy. Compd, 772, (2019)

[9]

Hagihara K, Li Z, Yamasaki M, Et al., Strengthening mechanisms acting in extruded Mg-based long-period stacking ordered (LPSO)phase alloys [J], Acta Mater, 163, (2019)

[10]

Du X H, Duan G S, Hong M, Et al., Effect of V on the microstructure and mechanical properties of Mg-10Er-2Cu alloy with a long period stacking ordered structure [J], Mater. Lett, 122, 5, (2014)

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