多道次搅拌摩擦加工AZ91镁合金组织和力学性能的研究
Microstructures and mechanical properties of the multi-passes friction stir processed AZ91 magnesium alloy
采用两种不同尺寸的搅拌头，对6 mm厚的AZ91镁合金分别进行一道次和两道次搅拌摩擦加工。通过金相显微镜、扫描电镜、维氏硬度计、拉伸试验机等分析加工区域材料的显微组织和力学性能。结果表明，搅拌摩擦加工可显著细化晶粒，制备细晶组织。与一道次加工相比，二道次加工后搅拌区的组织稍有细化，组织均匀化程度有所提高。由于组织细化和均匀性提高，搅拌摩擦加工合金的力学性能较铸态合金明显提高。与一道次加工相比，二道次加工后合金的力学性能稍有提高。
he AZ91 magnesium alloy with a thickness of 6 mm was subjected to one pass and two passes friction stir processing (FSP) by different stir tools. Microstructures and mechanical properties of the FSPed alloy were investigated by OM, SEM, microhardness measurement and tensile test. The results show that FSP can significantly refine the microstructure and fine-grained alloy can be prepared. Compared with one pass FSP, microstructures of the two passes FSP alloy can be refined slightly and distributed more uniformly. After FSP, the mechanical properties can be remarkably increased owing to fine and uniform microstructures. Two passes FSP can slightly improve the mechanical properties compared with one pass FSP.
张大童、柴方、张文、邱诚
金属压力加工金属学、热处理
多道次搅拌摩擦加工Z91镁合金组织力学性能
Multi-passes friction stir processingAZ91 magnesium alloyMicrostructureMechanical properties
张大童,柴方,张文,邱诚.多道次搅拌摩擦加工AZ91镁合金组织和力学性能的研究[EB/OL].(2016-06-07)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/201606-470.点此复制
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