采用不同的锻压温度、锻压力和锻压比,进行了石墨烯增强铝基复合材料汽车连杆的锻压成形,并进行了耐磨损性能的测试与分析。结果表明：随锻压温度从350℃增加至500℃,锻压力从4 k N增加至10 k N,锻压比从8.6增加至23.2,石墨烯增强铝基...采用不同的锻压温度、锻压力和锻压比,进行了石墨烯增强铝基复合材料汽车连杆的锻压成形,并进行了耐磨损性能的测试与分析。结果表明：随锻压温度从350℃增加至500℃,锻压力从4 k N增加至10 k N,锻压比从8.6增加至23.2,石墨烯增强铝基复合材料汽车连杆的耐磨损性能均先提高后下降。与锻压温度350℃相比,锻压温度425℃使试样的磨损体积减小46%;与锻压力4 k N相比,锻压力8 k N使试样磨损体积减小39%;与锻压比8.6相比,锻压比15.4使试样的磨损体积减小41%。通过结果分析可知,石墨烯增强铝基复合材料汽车连杆的锻压温度、锻压力和锻压比分别优选为425℃、8 k N和15.4。展开更多
5.0 vol.% graphene nanoplatelets(GNPs) and aluminum powders were mixed to prepare GNPs/Al composites via high-energy ball milling(HEBM). The mixed powders were subjected to spark plasma sintering(SPS) and subsequent h...5.0 vol.% graphene nanoplatelets(GNPs) and aluminum powders were mixed to prepare GNPs/Al composites via high-energy ball milling(HEBM). The mixed powders were subjected to spark plasma sintering(SPS) and subsequent hot extrusion. The microstructure and mechanical properties of extruded composites were investigated by X-ray photoelectron spectroscopy(XPS), transmission electron microscopy(TEM) and tensile tests. In the extruded composites, 5.0 vol.% GNPs were dispersed homogeneously and no serious GNP-Al interfacial reaction occurred. As a result, the yield strength and ultimate tensile strength of the extruded GNPs/Al composites reached 462 and 479 MPa, which were 62% and 60% higher than those of the extruded Al matrix, respectively. The enhanced mechanical properties were attributed to the effective load transfer capacity of dispersed GNPs. This demonstrated that it may be promising to introduce dispersed high-content GNPs via HEBM, SPS and hot extrusion techniques and GNP-Al interfacial reaction can be controlled.展开更多
文摘采用不同的锻压温度、锻压力和锻压比,进行了石墨烯增强铝基复合材料汽车连杆的锻压成形,并进行了耐磨损性能的测试与分析。结果表明：随锻压温度从350℃增加至500℃,锻压力从4 k N增加至10 k N,锻压比从8.6增加至23.2,石墨烯增强铝基复合材料汽车连杆的耐磨损性能均先提高后下降。与锻压温度350℃相比,锻压温度425℃使试样的磨损体积减小46%;与锻压力4 k N相比,锻压力8 k N使试样磨损体积减小39%;与锻压比8.6相比,锻压比15.4使试样的磨损体积减小41%。通过结果分析可知,石墨烯增强铝基复合材料汽车连杆的锻压温度、锻压力和锻压比分别优选为425℃、8 k N和15.4。
基金financial supports from National Key R&D Program of China (2017YFB0703103)Key Area R&D Program of Guangdong Province,China (2019B010942001)。
文摘5.0 vol.% graphene nanoplatelets(GNPs) and aluminum powders were mixed to prepare GNPs/Al composites via high-energy ball milling(HEBM). The mixed powders were subjected to spark plasma sintering(SPS) and subsequent hot extrusion. The microstructure and mechanical properties of extruded composites were investigated by X-ray photoelectron spectroscopy(XPS), transmission electron microscopy(TEM) and tensile tests. In the extruded composites, 5.0 vol.% GNPs were dispersed homogeneously and no serious GNP-Al interfacial reaction occurred. As a result, the yield strength and ultimate tensile strength of the extruded GNPs/Al composites reached 462 and 479 MPa, which were 62% and 60% higher than those of the extruded Al matrix, respectively. The enhanced mechanical properties were attributed to the effective load transfer capacity of dispersed GNPs. This demonstrated that it may be promising to introduce dispersed high-content GNPs via HEBM, SPS and hot extrusion techniques and GNP-Al interfacial reaction can be controlled.
