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| T4 热处理对石膏型 AZ91 铸造镁合金组织和性能的影响 |
| Effect of T4 Heat Treatment on Microstructure and Mechanical Properties of AZ91 Alloys Prepared by Plaster Casting |
| Received:May 27, 2013 Revised:June 01, 2013 |
| DOI：10.3969/j.issn.1674-6457.2013.04.005 |
| 中文关键词: AZ91 镁合金 T4 显微组织 力学性能 |
| 英文关键词: AZ91 magnesium alloy T4 microstructure mechanical properties |
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| 中文摘要: |
| 用石膏型熔模铸造技术,成功制备了 AZ91 镁合金铸件。 用金相显微镜( OM) 、扫描电镜( SEM) 、能谱( EDS) 以及电子万能实验机等,研究了 AZ91 镁合金铸态及 T4 热处理态的显微组织演变和力学性能。结果表明,分布在铸态 AZ91 镁合金晶界的网状 -Mg17Al12 相在 T4 热处理过程中逐渐溶解,铸态和 T4 热处理态中均存在大量的 Al8Mn5 化合物,T4 处理后,其力学性能显著提高。 |
| 英文摘要: |
| AZ91 magnesium alloy castings were successfully prepared by plaster casting technique. The microstructure evolution and mechanical properties of AZ91 magnesium alloys with cast and T4 heat treatment were studied by optical microscopy ( OM) , scanning electron microscopy ( SEM) , EDS and electronic universal testing machine. It is indicated that the reticular -Mg17Al12 phase in the grain boundary of casting AZ91 alloy gradually dissolved during T4 heat treatment process. In the microstructures of cast and T4 treatment AZ91 alloy, lots of Al8Mn5 phase were found. The mechanical performance of AZ91 alloy is significantly improved by T4 heat treatment process. |
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