搅拌摩擦加工技术对高硅铝合金拉伸性能的影响分析

发布时间：2018-05-23 15:31

本文选题：高硅铝合金 + 搅拌摩擦加工　；参考：《热加工工艺》2017年20期

【摘要】：研究了搅拌摩擦加工(FSP)技术对高硅铝合金Al Si30的抗拉强度、伸长率的影响,探讨了其断裂机理。结果表明,随着摩擦搅拌道次的增加,Al Si30的强度和塑性都显著提高,材料的断裂模式从脆性断裂转变为韧性断裂。当摩擦搅拌道次较少时,粗大硅相多,且不够圆整,裂纹首先发源于粗大硅颗粒内部,并引发基体断裂,硅相的断裂面与周围基体的断裂面平齐;当摩擦搅拌道次较多时,粗大硅相少,而且圆整,裂纹基本上发源于粗大硅颗粒/铝基体界面。
[Abstract]:The effects of friction stir processing (FSP) technology on tensile strength and elongation of Al Si30 alloy with high silicon content were studied. The fracture mechanism was discussed. The results show that the strength and plasticity of Al Si30 increase with the increase of friction stir pass, and the fracture mode changes from brittle fracture to ductile fracture. When the friction stir passage is less, the coarse silicon phase is more and less round, the crack originates in the coarse silicon particle at first, and causes the matrix fracture, the fracture surface of the silicon phase is even with the fracture surface of the surrounding matrix, and when the friction stir passage is more frequently, the fracture surface of the silicon phase is equal to the fracture surface of the surrounding matrix, and when the friction stir passage is more frequently, The coarse silicon phase is few, and the crack is round, the crack basically originates from the coarse silicon particle / aluminum matrix interface.
【作者单位】：云南机电职业技术学院;
【分类号】：TG146.21

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