| Nd、Ca复合添加对铸态Mg-Gd-Zr合金组织及力学性能的影响 |
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| 引用本文： | 宋 蕾,刘彪彪,李越,王 建,张全福,任乃栋,武维康,王红霞. Nd、Ca复合添加对铸态Mg-Gd-Zr合金组织及力学性能的影响[J]. 有色金属工程, 2024, 0(4): 1-9 |
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| 作者姓名： | 宋 蕾 刘彪彪 李越 王 建 张全福 任乃栋 武维康 王红霞 |
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| 作者单位： | 孝义市东义镁业有限公司,太原理工大学 材料科学与工程学院,太原理工大学 材料科学与工程学院,孝义市东义镁业有限公司,孝义市东义镁业有限公司,孝义市东义镁业有限公司,孝义市东义镁业有限公司,太原理工大学 材料科学与工程学院 |
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| 基金项目： | 山西省科技成果转化引导专项(202104021301022, 202204021301009)；山西省自然科学(20210302123135, 20210302123163); 中央引导地方科技发展资金项目(YDZJSX20231B003) |
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| 摘 要： | 采用金属型铸造法制备了Mg-6Gd-0.5Zr合金(GK60)、Mg-4Gd-2Nd-0.5Zr(GNK420)合金和Mg-4Gd-1Nd-1Ca-0.5Zr(GNXK4110)合金，研究了Mg-6Gd-0.5Zr合金中Nd替代Gd元素，Nd、Ca复合添加替代Gd元素对合金组织和力学性能的影响。结果表明：元素总量一定时，随着合金元素种类的增多，合金晶粒尺寸显著减小，平均晶粒尺寸从GK60合金的114.59μm减小到GNK420合金的102.69μm和GNXK4110合金的79.51μm;第二相由Mg5Gd相和Mg3Gd相演变到Mg5(Gd, Nd)相，再到Mg7(Gd, Nd, Ca)相，第二相数量显著增多。由于晶粒细化及第二相的强化作用使得三种合金的屈服强度和抗拉强度逐渐提高，而伸长率先降后升，GNXK4110合金力学性能最好，屈服强度和抗拉强度分别达到98.36 MPa和162.5 MPa,伸长率达到7.97%。
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| 关 键 词： | 镁合金 复合添加 晶粒尺寸 第二相 力学性能 |
| 收稿时间： | 2023-08-05 |
| 修稿时间： | 2023-09-20 |
Effect of addition of Nd and Ca on microstructure and mechanical properties of as-cast Mg-Gd-Zr alloy |
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| Song Lei,Liu Biaobiao,Li Yue,Wang Jian,Zhang Quanfu,Ren Naidong,Wu Weikang and Wang Hongxia. Effect of addition of Nd and Ca on microstructure and mechanical properties of as-cast Mg-Gd-Zr alloy[J]. Nonferrous Metals Engineering, 2024, 0(4): 1-9 |
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| Authors: | Song Lei Liu Biaobiao Li Yue Wang Jian Zhang Quanfu Ren Naidong Wu Weikang Wang Hongxia |
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| Affiliation: | Xiaoyi Dongyi Magnesium Industry Co,Ltd,Xiaoyi Shanxi,College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan Shanxi,College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan Shanxi,Xiaoyi Dongyi Magnesium Industry Co,Ltd,Xiaoyi Shanxi,Xiaoyi Dongyi Magnesium Industry Co,Ltd,Xiaoyi Shanxi,Xiaoyi Dongyi Magnesium Industry Co,Ltd,Xiaoyi Shanxi,Xiaoyi Dongyi Magnesium Industry Co,Ltd,Xiaoyi Shanxi,College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan Shanxi |
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| Abstract: | Mg-6Gd-0.5Zr alloy(GK60), Mg-4Gd-2Nd-0.5Zr alloy(GNK420) and Mg-4Gd-1Nd-1Ca-0.5Zr alloy(GNXK4110) were prepared by the metal mould casting method. The effects of Nd replacing Gd element and Simultaneous substitution of Nd and Ca elements for Gd elements in Mg-6Gd-0.5Zr alloy on the microstructure and mechanical properties of the alloy were investigated. The results reveal that the grain size of the alloy decreases significantly with the variety of alloy elements when the total amount of elements is constant. The average grain size decreased from 114.59 μm in GK60 alloy to 102.69 μm in GNK420 alloy and 79.51 μm in GNXK4110. The second phase evolved from Mg5Gd and Mg3Gd to Mg5(Gd,Nd) and then to Mg7(Gd,Nd,Ca). Meanwhile, the number of the second phase increased significantly. The yield strength (YS) and ultimate tensile strength (UTS) of the three alloys increase gradually due to grain refinement and second phase strengthening, while the elongation (EL) first decreases and then increases. The GNXK4110 alloy obtained the best mechanical properties, the YS and UTS reached 98.36MPa and 162.5MPa, respectively, and the EL reached 7.97%. |
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| Keywords: | magnesium alloy composite addition grain size the second phase mechanical property |
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