IMC/Al功能梯度复合材料的搅拌摩擦增材制造、形成机理及力学行为

项目名称： IMC/Al功能梯度复合材料的搅拌摩擦增材制造、形成机理及力学行为

项目编号： No.51465044

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 机械、仪表工业

项目作者： 黄春平

作者单位： 南昌航空大学

项目金额： 50万元

中文摘要： 金属间化合物增强铝基（IMC/Al）功能梯度复合材料满足了耐磨部件要求轻量化、表面高耐磨，而整体要求高韧性和疲劳性能的需要，但目前的制备工艺对材料的结构调控较为困难。本项目结合搅拌摩擦加工、增材制造技术特点和功能梯度材料的结构特点提出的搅拌摩擦增材制造技术为原位合成IMC/Al功能梯度复合材料提供新途径。利用铝合金板和合金粉末作为原始材料，采用多步搅拌摩擦加工的方式，逐层制备出IMC/Al功能梯度复合材料，并形成纳米表层。 项目采用对比试验研究、理论分析计算的研究方法，研究材料的组织演化和梯度层的形成规律，并对材料的综合力学行为进行分析，揭示搅拌摩擦增材制造原位合成IMC/Al功能梯度复合材料中增强相的形成机理，把握反应过程中的组织演化规律，获得功能梯度复合材料结构-综合机械性能相关性规律，为搅拌摩擦增材制造原位制备IMC/Al功能梯度复合材料的工业化应用提供理论依据和技术基础。

中文关键词： 搅拌摩擦加工；金属间化合物；功能梯度复合材料；形成机制；力学行为

英文摘要： Intermetallic compounds reinforced aluminum matrix (IMC/Al)functionally graded material(FGM) can meet the needs of the wear-resistant components as a light weight & high strength & high wear resistancce in surface layer but high toughness & high fatigue performance in overall. However, the current manufacturing process is more difficult to control the microstructure. The project provides a new way to in-situ synthesis IMC/Al FGM, named friction stir additive manufacturing (FSAM) which combined with the technical advantages of friction stir processing & additive manufacturing and structural features of FGM. FGM has been produced layer by layer with using of Aluminum alloy plate and alloy powder as raw material.As a result, the nano-surface will form with rapid cooling of FSAM. With the method of comparative experiment and theoretical analysis & calculatio , the microstructural evolution and formation of gradient layer have been investigated, the mechanical behavior of IMA/Al FGM has been analyzed. The other purpose of the project is revealing in-situ synthesis mechanism of IMA/Al FGM via friction stir additive manufacturing, understanding the microstructure evolution of the reaction process. The success of the research can provided a theoretical basis for the industrial application of FSAM in-situ preparation intermetallic compounds reinforced aluminum matrix FGM composites.

英文关键词： Friction Stir Processing;Intermetallics;functionally graded material;formation mechanism;Mechanical Properties