符韵,沈蕾芳,项运良,等.Mg-5Gd-4Y-0. 3Zr 合金组织和力学性能研究[J].精密成形工程,2015,7(5):130-134.
FU Yun,SHEN Lei-fang,XIANG Yun-liang,et al.Microstructure and Mechanical Properties of Mg-5Gd-4Y-0. 3Zr[J].Journal of Netshape Forming Engineering,2015,7(5):130-134. |
| Mg-5Gd-4Y-0. 3Zr 合金组织和力学性能研究 |
| Microstructure and Mechanical Properties of Mg-5Gd-4Y-0. 3Zr |
| 投稿时间：2015-07-24 修订日期：2015-09-10 |
| DOI：10.3969/j.issn.1674-6457.2015.05.022 |
| 中文关键词: Mg-5Gd-4Y-0. 3Zr 合金 热挤压 显微组织 力学性能 |
| 英文关键词: Mg-5Gd-4Y-0. 3Zr alloy hot extrusion microstructure mechanical properties |
| 基金项目: |
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| 摘要点击次数: 4073 |
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| 中文摘要: |
| 目的 研究均匀化、挤压及时效热处理对 Mg-5Gd-4Y-0. 3Zr 合金组织和力学性能的影响。方法 制备了 Mg-5Gd-4Y-0. 3Zr 合金铸棒,并进行了均匀化处理和热挤压处理。 对不同状态的试样进行了拉伸试验,观察了金相显微组织,采用 X 射线衍射方法进行了结构分析。 结果 铸态合金组织主要由 α-Mg 基体和第二相 Mg5(Gd, Y)组成;经过均匀化处理后,合金的第二相发生了完全回溶,合金的力学性能得到了提升;合金经挤压后,组织得到了明显细化,在 200 ℃ 保温 60 h 得到了强度的最大值,抗拉强度、屈服强度和伸长率分别为 423. 0 MPa,335. 0 MPa 与 9. 0% 。 结论Mg-5Gd-4Y-0. 3Zr 合金既保证了低成本,又具有优良的力学性能,适合推广应用。 |
| 英文摘要: |
| The aim of this work was to investigate the effects of homogenization, extrusion and aging treatment on the microstructure and mechanical properties of Mg-5Gd-4Y-0. 3Zr alloy. Mg-5Gd-4Y-0. 3Zr alloy casting rod was prepared, then homogenization treatment and hot extrusion treatment were carried out. Tensile tests were conducted on the samples with different states. The metallographic microstructure was observed, and XRD was used to analyze the structure. The results showed that the as-cast alloy mainly consisted of a-Mg matrix and the second phase Mg5(Gd, Y). The second phase of the alloy dissolved completely after the homogenization treatment, and the mechanical property of the alloy was increased. The alloy structure was obviously refined after extrusion. The highest mechanical property was obtained after aging treatment at 200 ℃ for 60 h, and the ultimate tensile strength, yield strength and elongation were 423. 0 MPa, 335. 0 MPa, and 9. 0%, respectively. In conclusion, Mg-5Gd-4Y-0. 3Zr alloy not only has low cost feature, but also has excellent mechanical property. It is suitable for popularization and application. |
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