摘要
Al6061matrix with different amounts of nano-silver(1%and2%)was produced by stir-casting method.Producedsamples were characterized by hardness,tensile,compression and wear tests.The hardness of the specimens at room temperature wasmeasured by Brinnell hardness testing machine.The magnitude of hardness increased evidently with the function of the mass fractionof the nano-Ag particle.The polished specimens were examined with an optical microscope.The fracture surfaces of tensile andcompressive specimens were further examined by scanning electron microscopy.Wear mechanisms were discussed based on thescanning electron microscopy observations of worn surface and wear debris morphology.There is an increase in compressivestrength,ultimate tensile strength,elongation and wear resistance of the Al?Ag composites compared with base alloy.The executionof stir-casting technique is relatively homogenous and fine microstructure which improves the addition of reinforcement material inthe molten metal.The results show that Al6061?nano-silver which is the best combination of hardness can replace the conventionalmaterial for better performance and longer life.
利用搅拌铸造法制备不同含量纳米银(1%,2%)6061铝基合金,采用硬度、拉伸、压缩和磨损实验表征所制备的试样,并用布氏硬度试验机测试样品的室温硬度。随着合金化元素质量分数的增加,硬度明显增大。采用光学显微镜检测抛光样品,通过扫描电子显微镜进一步研究拉伸和压缩试件的断裂表面。与基体合金相比,铝-银合金的抗压强度、极限抗拉强度、伸长率和耐磨性有所提高。采用搅拌铸造技术得到了相对均匀和精细的组织,提高了熔融金属中增强材料的添加量。结果表明,最佳硬度组合6061铝-纳米银合金可取代传统材料,获得更优的性能和较长的寿命。
作者
G.PITCHAYYAPILLAI
P.SEENIKANNAN
P.BALASUNDAR
P.NARAYANASAMY
G. PITCHAYYAPILLAI;P. SEENIKANNAN;P. BALASUNDAR;P. NARAYANASAMY(Department of Mechanical Engineering, Sethu Institute Technology,Kariapatti;Department of Mechanical Engineering, Rajalakshmi Institute of Technology;Department of Mechanical Engineering, Kamaraj College of Engineering and Technology)
