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首页> 外文期刊>Journal of Materials Engineering and Performance >Microstructure Evolution and Mechanical Properties of AQ80 Alloy During Forward Extrusion and Twist Deformation
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Microstructure Evolution and Mechanical Properties of AQ80 Alloy During Forward Extrusion and Twist Deformation

机译：正向挤出过程中AQ80合金的微观结构演化与力学性能

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摘要

A new severe plastic deformation technique, forward extrusion and twist deformation, was adopted to manufacture magnesium (Mg) alloys at different temperatures. The microstructure evolution and mechanical properties of extruded AQ80 alloy were investigated. The strain distribution in FETD extrusion was simulated with finite element simulation software. The extruded samples exhibit finer grain sizes, weaker basal textures, higher recrystallized volume fractions and higher strengths than the traditional forward extrusion samples. This technology can refine the microstructure and improve the mechanical properties of Mg alloys. At lower temperatures, the grain size is smaller with a finer second phase, which is detected as Mg(17)AL(12). Mg(17)AL(12)has a particle-stimulated nucleation effect and a retarding effect on grain growth, resulting in much finer DRXed grains. Due to the effects of fine-grained strengthening and second phase strengthening, the strength and elongation of AQ80 alloy can be improved significantly.
机译：采用一种新的剧烈塑性变形技术——正向挤压和扭转变形，在不同温度下制备镁合金。研究了挤压AQ80合金的组织演变和力学性能。利用有限元模拟软件对FETD挤出过程中的应变分布进行了模拟。与传统正挤压试样相比，挤压试样具有更细的晶粒尺寸、较弱的基体织构、更高的再结晶体积分数和更高的强度。该技术可以细化镁合金的微观组织，提高其力学性能。在较低温度下，晶粒尺寸较小，第二相更细，被检测为Mg（17）AL（12）。Mg（17）AL（12）具有颗粒刺激形核效应和对晶粒生长的阻碍效应，从而产生更细的DRX晶粒。由于细晶强化和第二相强化的作用，AQ80合金的强度和延伸率可以显著提高。

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