搅拌摩擦法制备铝基表面纳米复合材料
Development of Aluminium Based Surface Nano Composites Using Friction Stir Processing
摘要：
搅拌摩擦加工是一种通过强烈的局部塑性形变对金属材料进行组织改性的新技术。本论文的主要工作是研究具有不同体积分数的第二相粒子的无缺陷铝基表面纳米复合材料。本文的工作包括铝基表面纳米复合材料的制备和变形行为。采用一种新颖独特的技术--摩擦搅拌工艺，将纳米结构的钨和氧化铝第二相引入到铝基体中。使用扫描电子显微镜和X射线衍射进行微观结构表征。使用维氏显微硬度评价机械行为。最终建立了结构-性能相关性。
英文摘要：
Friction Stir Processing is a relatively new technique which has been developed for microstructural modification of metallic materials through intense, localized plastic deformation. The current research work deals with the development of defect free Aluminium based surface nano composites, with different volume fractions of second phase particles. The work is comprised of development and deformation behavior of aluminium based surface nano composites. Nano-structured second phases of Tungsten and Aluminium oxide were introduced into the Aluminium matrix using a novel unique technique, friction stir processing. Microstructural characterization was done using Scanning Electron Microscopy and Xray Diffraction. Mechanical behavior was evaluated using Vicker's micro hardness. Ultimately structure property correlations were established.
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