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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials >Production, microstructural and mechanical characterization of spray formed Al-6 wt.% Fe alloy and pre-mixed Al-6 wt.% Fe/SiCp composite
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Production, microstructural and mechanical characterization of spray formed Al-6 wt.% Fe alloy and pre-mixed Al-6 wt.% Fe/SiCp composite

机译：喷射成型的Al-6 wt％Fe合金和预混合的Al-6 wt％Fe / SiCp复合材料的生产，显微组织和力学性能

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摘要

Different batches of Al-6 wt.% Fe and of pre-composite Al-6 wt.% Fe/SiC powders were produced, via melting of aluminum followed by iron addition in the induction furnace of a gas atomizing unit, eventually adding in situ a suitable amount of SiC paniculate. The inclusion of the reinforcing particles in the melt was enhanced by means of stirring under an argon shielding atmosphere. Gas atomization via sonic close-coupled discrete jet nozzles was thereafter performed, and a part of the spray cone was intercepted by a still substrate. The microstructural characterization of both the pre-composite powder and of the spray deposited samples was carried out by microscopy, image analysis and X-ray diffraction. The high viscosity of the matrix allowed to achieve a maximum volumetric fraction of reinforcement of around 10%. By means of X-ray stress analysis the residual stresses in the spray formed specimens were determined, and resulted to be compressive, and higher in the composite material. The elastic properties of the spray formed samples were determined by the flexural resonance test, carried out on prismatic samples cut from the spray formed samples, while their transverse strengths were determined by three points bend test.
机译：通过熔化铝，然后在气体雾化装置的感应炉中添加铁，生产了不同批次的Al-6 wt。％Fe和预复合Al-6 wt。％Fe / SiC粉。适量的SiC颗粒。通过在氩气保护气氛下搅拌，增强了熔体中增强颗粒的包含。此后，通过声波紧密耦合的离散喷嘴进行气体雾化，并且一部分喷雾锥被静止的基底拦截。通过显微镜，图像分析和X射线衍射对预复合粉末和喷涂样品的微观结构进行了表征。基体的高粘度使得可以实现约10％的最大增强体积分数。通过X射线应力分析，确定了喷涂成型试样中的残余应力，结果是压缩应力，复合材料中的残余应力更高。通过弯曲共振测试确定喷射形成的样品的弹性性能，弯曲共振测试是对从喷射形成的样品切出的棱柱形样品进行的，而其横向强度通过三点弯曲测试来确定。

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