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首页> 外文期刊>Journal of Manufacturing Processes >Influences of friction stir processing parameters on microstructure and mechanical properties of SiC/Al composites fabricated by multi-pin tool
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Influences of friction stir processing parameters on microstructure and mechanical properties of SiC/Al composites fabricated by multi-pin tool

机译：搅拌摩擦加工参数对多针工具制备的SiC / Al复合材料组织和力学性能的影响

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摘要

The process parameters are the key factors that affect the microstructure and properties of aluminum matrix composites (AMCs) fabricated by friction stir processing (FSP). In the present investigation, the traditional single-pin tool and the newly designed multi-pin tool were employed to fabricate the AMCs reinforced by the SiC particles by FSP under different process parameters. The influences of process parameters on the microstructure, microhardness and wear behaviors of the composites were investigated. The reasonable matching of FSP process parameters was explored. A model for the influence of pin on the flow of plastic materials was established. The size of the SiC particles was minimized and uniformly distributed in the FSPed AMCs when the multi-pin tool at 950 rpm rotational speed and 40 mm/min traverse speed. The effect of stir and friction on the material was enhanced by the multi-pin tool compared to the single-pin tool, and increased the offset and broadening of the diffraction peaks of Al and SiC in the FSPed AMCs. The FSPed AMCs fabricated with the multi-pin tool had higher and less fluctuation microhardness than that with the single-pin tool under the same process parameters, as well as lower friction coefficient and less wear mass loss. The wear mechanisms of the FSPed AMCs changed from abrasive wear to adhesive wear as the size of SiC particles decreased.
机译：工艺参数是影响通过摩擦搅拌工艺（FSP）制成的铝基复合材料（AMC）的微观结构和性能的关键因素。在本研究中，采用传统的单针工具和新设计的多针工具在不同工艺参数下通过FSP制备由SiC颗粒增强的AMC。研究了工艺参数对复合材料组织，显微硬度和磨损行为的影响。探索了FSP工艺参数的合理匹配。建立了销钉对塑料材料流动影响的模型。当多针工具以950 rpm的转速和40 mm / min的横向速度移动时，SiC颗粒的尺寸被最小化并均匀地分布在FSPed AMC中。与单针工具相比，多针工具增强了搅拌和摩擦对材料的影响，并增加了FSPed AMC中Al和SiC衍射峰的偏移和展宽。在相同的工艺参数下，多销工具制造的FSPed AMC与单销工具相比具有更高和更低的波动显微硬度，并且摩擦系数更低，磨损质量损失更少。随着SiC颗粒尺寸的减小，FSPed AMC的磨损机理从磨料磨损变为粘着剂磨损。

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