The effect of the number of passes during friction stir processing on the structure and properties of the surface layers of aluminum alloy 5083 is investigated. The alloy is processed by the FSP method with one, two and four passes, after which the tensile strength, the elongation under static tension, the impact energy during dynamic bending and the microhardness are determined. After a single-pass FSP, a significant increase in the elongation of the material is observed. However, with increase in the number of passes, its plasticity decreases slightly, remaining above the initial value. It is shown that after FSP, the microhardness of the alloy increases, and the tensile strength and the impact energy decrease, and these changes become more significant with increase in the number of passes.

研究了搅拌摩擦加工道次对5083铝合金表层组织和性能的影响。采用FSP方法对合金进行一道次、二道次和四道次加工，然后测定其抗拉强度、静拉伸长率、动态弯曲冲击功和显微硬度。经过单遍 FSP 后，观察到材料的伸长率显着增加。然而，随着道次的增加，其塑性略有下降，仍高于初始值。结果表明，经过FSP处理后，合金的显微硬度增加，抗拉强度和冲击功降低，且随着道次的增加，这些变化变得更加显着。