刘治民,薛子腾,赵广辉,等.5052-O铝合金高温拉伸下力学性能和微观组织的演变规律研究[J].精密成形工程,2025,17(5):40-49.
LIU Zhimin,XUE Ziteng,ZHAO Guanghui,et al.Evolution of Mechanical Properties and Microstructure of 5052-O Aluminum Alloy under High-temperature Tensile Test[J].Journal of Netshape Forming Engineering,2025,17(5):40-49. |
| 5052-O铝合金高温拉伸下力学性能和微观组织的演变规律研究 |
| Evolution of Mechanical Properties and Microstructure of 5052-O Aluminum Alloy under High-temperature Tensile Test |
| 投稿时间：2024-07-29 |
| DOI：10.3969/j.issn.1674-6457.2025.05.005 |
| 中文关键词: 5052-O铝合金 高温拉伸 力学性能 微观组织 EBSD |
| 英文关键词: 5052-O aluminum alloy high-temperature stretching mechanical properties microstructure EBSD |
| 基金项目:山西省基础研究项目(20210302123207);山西省电子科技学院人才引进启动基金(2023RKJ023) |
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| 中文摘要: |
| 目的 深入理解5052-O铝合金性能随温度变化的规律，评估其高温适用性，指导加工工艺优化。方法 采用岛津AGS-100KN万能拉伸试验机对5052-O铝合金进行20~300 ℃拉伸试验。通过扫描电子显微镜(SEM)、电子背散射衍射仪(EBSD)表征分析不同拉伸环境温度对高温拉伸试验结果的影响。结果 在高温拉伸期间，5052-O铝合金不仅发生了加工硬化，还出现了动态回复现象，使材料的变形抗力降低、塑性变形能力提高。随着拉伸温度的升高，铝合金的力学性能有了明显的改善。在室温至200 ℃范围内，随着温度的升高，拉伸试样的抗拉强度有所增加，但变化幅度并不明显。当拉伸温度超过200 ℃以后，材料的抗拉强度明显减小。在300 ℃时，材料的抗拉强度减小为171.6 MPa。随着拉伸温度的升高，晶粒内部的亚晶界逐渐增多。当温度达到250 ℃及以上时，大晶粒沿拉伸方向伸长，晶界周围形成新的亚晶结构。此外，在室温条件下进行拉伸试验后，5052-O材料的主要织构是Goss织构({110}<001>)、Copper织构({112}<111>)和S织构({123}<634>)以及较弱的Brass织构({110}<112>)。随拉伸温度的升高，Cube织构表现出明显的择优取向，同时取向密度增大。结论 5052-O铝合金的抗拉强度随着温度的升高而先增后减。拉伸温度的升高使相邻的较小韧窝逐渐聚集，形成更大更深的韧窝。 |
| 英文摘要: |
| The work aims to deeply understand the evolution of the properties of 5052-O aluminum alloy with temperature variations to evaluate its high-temperature suitability, and guide the process optimization. The 20 ℃ to 300 ℃ tensile tests were performed on 5052-O aluminum alloy with a Shimadzu AGS-100KN universal tensile testing machine. The effect of different tensile environment temperatures on the results of high-temperature tensile tests was characterized and analyzed by scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). During high-temperature stretching, the 5052-O aluminum alloy not only underwent work hardening but also exhibited dynamic recovery, reducing the deformation resistance of the material and increasing its plastic deformation ability. With the increase in stretching temperature, the mechanical properties of the aluminum alloy showed significant improvement. Within the range of room temperature to 200 ℃, as the temperature increased, both the yield strength and tensile strength of the tensile samples increased, but the changes were not significant. After the stretching temperature exceeded 200 ℃, the tensile strength and yield strength of the material decreased significantly. At 300 ℃, the tensile strength of the material decreased to 171.6 MPa, and the yield strength decreased to 68.8 MPa. As the stretching temperature increased, the subgrain boundaries inside the grains gradually increased. When the temperature reached 250 ℃ and above, the large grains elongated along the stretching direction, and new subgrain structures formed around the grain boundaries. Furthermore, after tensile test at room temperature, the main textures of the 5052-O material were Goss texture ({110}<001>), Copper texture ({112}<111>), and S texture ({123<634>), as well as weaker Brass texture ({110}<112>). With the increase of stretching temperature, Cube texture showed a clear selective orientation, while the orientation density increased. The 5052-O aluminum alloy firstly increases and then decreases with the increase of temperature. Moreover, the increase in stretching temperature causes the adjacent smaller ducts to gradually gather, forming larger and deeper ducts. |
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