闫佳华,鲁若鹏,侯华,等.Ni元素和Y元素对烧结Mg基体组织和性能的影响[J].精密成形工程,2025,17(5):31-39.
YAN Jiahua,LU Ruopeng,HOU Hua,et al.Effect of Ni and Y Elements on the Microstructure and Properties of Sintered Mg Matrix[J].Journal of Netshape Forming Engineering,2025,17(5):31-39. |
| Ni元素和Y元素对烧结Mg基体组织和性能的影响 |
| Effect of Ni and Y Elements on the Microstructure and Properties of Sintered Mg Matrix |
| 投稿时间：2025-03-10 |
| DOI：10.3969/j.issn.1674-6457.2025.05.004 |
| 中文关键词: 烧结 球磨 元素分布 阻尼性能 Mg-Ni和Mg-Y合金 |
| 英文关键词: sintering ball milling element distribution damping performance Mg-Ni and Mg-Y alloys |
| 基金项目:国家自然科学基金(U23A20628) |
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| 摘要点击次数: 81 |
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| 中文摘要: |
| 目的 探究单独添加Ni和Y元素对烧结纯Mg显微组织的影响，并对比添加合金元素前后合金阻尼性能的差异，以期获得更高阻尼材料的研究方法。方法 对粉末进行高能球磨处理，利用放电等离子烧结炉使粉末在480 ℃下保温6 min，以制备试样，分别得到了纯Mg、Mg-2Ni和Mg-2Y(质量分数)试样。通过扫描电子显微镜(SEM)对合金的微观组织进行了表征。对所有试样进行了密度和硬度测试，采用万能力学试验机测试了合金的力学性能，并用动态机械分析仪(DMA)检测材料的阻尼性能。结果 与纯Mg试样相比，Mg-Ni和Mg-Y合金中因球磨产生了更多的长条状晶粒和沿晶界分布的合金元素，使材料的强度增加。Mg-Ni和Mg-Y合金的第二相分别为Mg2Ni和Mg24Y5。纯Mg试样的阻尼性能最优。由于添加元素的分布差异，在低应变下，Mg-Y合金比Mg-Ni拥有更高的阻尼值，而在高应变下，Mg-Ni合金比Mg-Y合金拥有更好的阻尼性能。结论 球磨工艺产生的长条状晶粒会对合金起到强化效果，而且会增加材料内部的缺陷，对提高材料的强度和阻尼有明显作用。在高应变下，Mg-Ni合金比Mg-Y合金拥有更高的阻尼性能，且Mg-Y合金的阻尼值也符合高阻尼范围。 |
| 英文摘要: |
| The work aims to investigate the effects of adding Ni and Y elements separately on the microstructure of sintered pure Mg, and compare the differences in damping properties of the alloy before and after addition of alloy elements, so as to propose a method for producing higher damping materials. The powder was first subjected to high-energy ball milling, and then samples were prepared via a discharge plasma sintering furnace at 480 ℃ for 6 min, yielding pure Mg, Mg-2Ni, and Mg-2Y samples (wt.%), respectively. The microstructures of the alloys were characterized by scanning electron microscopy (SEM). Density and hardness tests were conducted on all samples. The mechanical properties of the alloys were tested with a universal mechanical testing machine, and the damping performance of the material was also measured with a dynamic mechanical analyzer (DMA). Compared with pure Mg samples, Mg Ni and Mg-Y alloys had more elongated grains and alloy elements distributed along grain boundaries due to ball milling, which increased the strength of the material. The second phases of Mg-Ni and Mg-Y alloys were Mg2Ni and Mg24Y5, respectively. The damping performance of pure Mg sample was optimal. Due to the difference in the distribution of added elements, Mg-Ni alloy had higher damping values than Mg-Y alloy under low strain, while Mg-Ni alloy had better damping performance than Mg-Y alloy under high strain. The elongated grains produced by ball milling process will have a strengthening effect on the alloy and increase the internal defects of the material, which has a significant effect on improving the strength and damping of the material. Compared to Mg-Y alloy, Mg Ni alloy has higher damping performance at higher strains, and the damping of Mg-Y alloy also falls within the high damping range. |
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