| Mg2Si强化相对AZ31镁合金挤压组织与力学性能的影响 |
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| 引用本文： | 郑留伟,梁伟,张慧云,聂慧慧,郝欣为. Mg2Si强化相对AZ31镁合金挤压组织与力学性能的影响[J]. 金属热处理, 2020, 45(4): 40-44. DOI: 10.13251/j.issn.0254-6051.2020.04.008 |
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| 作者姓名： | 郑留伟 梁伟 张慧云 聂慧慧 郝欣为 |
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| 作者单位： | 1. 太原理工大学 分析测试中心, 山西 太原 030024;2. 先进镁基材料山西省重点实验室, 山西 太原 030024;3. 太原理工大学 材料科学与工程学院, 山西 太原 030024 |
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| 基金项目： | 国家自然科学基金;山西省高等学校科技创新项目;山西省科技重大专项 |
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| 摘 要： | 通过Al-Si中间合金取代Al添加,并经热挤压成形,在AZ31镁合金中引入Mg2Si强化相。采用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射分析(XRD)、电子万能试验机等研究了Mg2Si强化相对AZ31镁合金挤压组织与力学性能的影响。结果表明,添加Al-Si中间合金后的Mg-3(Al-Si)-Zn挤压组织呈现明显的双峰分布特征,Mg2Si颗粒相可通过粒子激发形核(PSN)作用促进动态再结晶,在碎化的Mg2Si颗粒相周围,合金组织显著细化,形成明显异于其他正常尺寸晶粒的细晶区。引入Mg2Si强化相后,Mg-3(Al-Si)-Zn挤压态合金的屈服强度和抗拉强度都得到提高,分别达到175和269 MPa,同时伸长率略有降低。
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| 关 键 词： | AZ31镁合金 Mg2Si强化相 微观组织 力学性能 |
| 收稿时间： | 2019-09-27 |
Effect of Mg2Si phase on microstructure and mechanical properties of as-extruded AZ31 magnesium alloy |
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| Zheng Liuwei,Liang Wei,Zhang Huiyun,Nie Huihui,Hao Xinwei. Effect of Mg2Si phase on microstructure and mechanical properties of as-extruded AZ31 magnesium alloy[J]. Heat Treatment of Metals, 2020, 45(4): 40-44. DOI: 10.13251/j.issn.0254-6051.2020.04.008 |
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| Authors: | Zheng Liuwei Liang Wei Zhang Huiyun Nie Huihui Hao Xinwei |
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| Affiliation: | 1. Instrumental Analysis Center of Taiyuan University of Technology, Taiyuan Shanxi 030024, China; 2. Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan Shanxi 030024, China; 3. School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China |
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| Abstract: | Mg2Si phase was introduced into AZ31 magnesium alloy by replacing Al with Al-Si master alloy combined with hot extrusion. Effect of Mg2Si phase on the microstructure and mechanical properties of AZ31 magnesium alloy was studied by optical microscope (OM), scanning electron microscopy (SEM), X-ray diffraction analysis (XRD) and electronic universal testing machine.The results show that the Mg-3(Al-Si)-Zn extrusion microstructure presents obvious bimodal distribution, and the Mg2Si particle phase can promote dynamic recrystallization by particle stimulated nucleation (PSN), and the microstructure is refined dramatically around Mg2Si particles. The yield and tensile strength of Mg-3(Al-Si)-Zn alloy are improved to 175 MPa and 269 MPa, respectively, while the elongation decreases slightly after the introduction of Mg2Si strengthening phase. |
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| Keywords: | AZ31 magnesium alloy Mg2Si strengthening phase microstructure mechanical properties |
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