Surface wear behavior and strengthening mechanism of Al₃Zr particle reinforced aluminum matrix composites prepared in situ

Abstract

Al 3 Zr+AA6082 particulate reinforced aluminum matrix composites were prepared in situ at 750 °C, 780 °C and 810 °C by the reaction of K 2 ZrF 6 salt-coated powder with AA6082 melt under electromagnetic stirring. Linear friction and wear tests at room temperature were carried out on three kinds of Al matrix composites prepared at different temperatures. The test result were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), EDS, confocal laser scanning microscopy and transmission electron microscopy (TEM). The results show that the Al 3 Zr phase is formed at 750 °C, 780 °C and 810 °C and small. Under the same load, the wear volume of the composites prepared at 780 °C and 810 °C is larger than that of the aluminum matrix composites prepared at 750 °C. The main wear mechanisms of aluminum matrix composites prepared at various temperatures under different loads are adhesive wear, and the wear volume increases with the increase of load. The average friction coefficient of the three composites under different loads is about 0.5, and the friction performance is stable.

Study on Microstructure and Mechanical Properties of Friction Stir Welding Joints of In-Situ Al3Zr/AA6082 Particle-Reinforced Aluminum Matrix Composites

“…Compared with the traditional melting welding technology, friction stir welding has quieter working environment, lower pollution and lower energy consumption [9][10][11][12][13][14][15]. due to the low welding heat input, friction stir welding can reduce the welding residual stress and post-welding deformation, improve the compactness of the weld microstructure and avoid the loss of stirring head [16][17][18][19][20][21][22][23]. Friction stir welding is widely used in aluminum matrix composites with poor welding performance due to the advantages of low welding heat input and no molten pool that traditional fusion welding does not have [24][25][26][27][28][29].…”

Effect of electromagnetic stirring current on microstructure and corrosion resistance of Al–Sn Alloy

“…The melt moves as a whole under the action of the magnetic field, and the stirring range is large [11]. The parameters of EMS are easy to control, and the flow state of the melt can be controlled by changing the electromagnetic parameters, which is convenient for process optimization [12]. Li et al [13] used EMS to prepare an Al-Si alloy with a uniform and fine structure.…”

Microstructure and tribological behavior of in situ ZrB2/A356 composites prepared under magnetic field

“…Due to its unique composite properties, in-situ aluminum matrix composites have a wide range of applications in the fields of aircraft shell, landing gear pillar and turbine engine components. SiC [10], B 4 C [11], Al 2 O 3 [12], TiC [13], TiB 2 [14], TiO 2 [15], SiO 2 [16], Al 3 Zr [17,18], AlB 2 [19] and ZrB 2 [20] are commonly used reinforcing particles in aluminum matrix composites. Different techniques are used to prepare high performance in-situ composites to improve interfacial compatibility [21][22][23][24].…”