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首页> 外文期刊>Materials Science and Engineering >Forging of the AA6061/23 vol.%Al_2O_3p composite: Effects on microstructure and tensile properties
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Forging of the AA6061/23 vol.%Al_2O_3p composite: Effects on microstructure and tensile properties

机译：锻造AA6061 / 23 vol。％Al_2O_3p复合材料：对显微组织和拉伸性能的影响

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摘要

In this study, the influence of the forging process on microstructure, tensile resistance and fracture behaviour of the AA6O61/Al_2O_3/23P composite is presented and discussed. Forging was carried out in an open die, at the temperature of 470℃, with a deformation ratio of 2.5:1 then the specimens were heat treated at the T6 condition. Microstructural characterization and density measurements showed that hot forging did not induce crack of the particle on the AA6061/Al_2O_3/23p composite and reduced the porosity with respect to the as-cast material. Usually in literature a reduction of the degree of clustering, due to plastic deformation, is reported. On the contrary, probably due to the low deformation ratio applied, no appreciable difference was observed in the degree of particles clustering, before and after forging. The concurrent effect of plastic deformation and high temperature during forging, instead, led to a recrystallization of the aluminium alloy matrix, with a consequent grain refinement. These microstructural modifications induced an improvement in the tensile strength and an increase, from 50% at room temperature to 165% at 300℃, of elongation at failure in the forged composite.
机译：本文研究并讨论了锻造工艺对AA6O61 / Al_2O_3 / 23P复合材料的组织，拉伸强度和断裂行为的影响。在开模中于470℃的温度下进行锻造，变形比为2.5：1，然后在T6条件下对试样进行热处理。显微组织表征和密度测量表明，热锻造不会在AA6061 / Al_2O_3 / 23p复合材料上引起颗粒开裂，并且降低了铸态材料的孔隙率。通常在文献中报道了由于塑性变形导致的聚集度降低。相反，可能由于所施加的变形率低，在锻造之前和之后，在晶粒聚集程度上没有观察到明显的差异。相反，塑性变形和锻造过程中高温的共同影响导致铝合金基体的再结晶，从而使晶粒细化。这些微观结构的改变导致锻造复合材料的拉伸强度提高，并从室温下的50％增加到300℃下的165％。

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