Abstract

This study presents an unconventional flow processing technique that uses glass microspheres instead of abrasives. The fundamentals of flow machining with glass microspheres, including microsphere flow burnishing (MFB) and the conditions necessary for cutting or plastic deformation of a surface to occur during MFB, are determined. Details on such conditions are lacking, and therefore, this study attempts to define these conditions. To this end, MFB was experimentally confirmed to be a burnishing process, and the effects of MFB and abrasive flow machining (AFM) on 2017A aluminum alloy were compared. Both processes achieved a surface roughness (Sa) of < 0.5 μm, while MFB yielded higher values of surface microhardness and compressive stress. The effects of basic process parameters on the MFB and AFM results (workpiece weight loss and Sa) were compared experimentally, and the corresponding mathematical models were established. Utilizing these relationships, MFB parameters can be selected so as to obtain the most favorable surface layer for the expected operating conditions.

中文翻译：

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2017A玻璃微珠流光抛光后的合金表层

摘要

这项研究提出了一种非常规的流动加工技术，使用玻璃微球代替磨料。确定了玻璃微球流动加工的基本原理，包括微球流动抛光 (MFB) 以及 MFB 期间发生表面切割或塑性变形所需的条件。由于缺乏此类条件的详细信息，因此本研究试图定义这些条件。为此，通过实验证实MFB是一种抛光工艺，并比较了MFB和磨粒流加工（AFM）对2017A铝合金的效果。两种工艺均实现了 < 0.5 μm 的表面粗糙度 ( Sa )，而 MFB 产生了更高的表面显微硬度和压应力值。通过实验比较了基本工艺参数对MFB和AFM结果（工件失重和Sa）的影响，并建立了相应的数学模型。利用这些关系，可以选择 MFB 参数，以获得针对预期操作条件最有利的表面层。