利用光学显微镜及动电位极化曲线技术, 研究了8 mm厚铝合金6082搅拌摩擦焊焊缝的组织形貌及其电化学性能. 结果表明, 主轴转速为1000 r/min, 焊接速度为 160 mm/min, 搅拌头倾角为3°的焊缝组织出现了明显的变化, 焊核区组织发生了动态再 结晶, 形成细小的等轴晶结构, 动电位极化测试表明焊缝的腐蚀电压较两种母材的高, 腐蚀电流较两种母材小.
Microstructure and potentiodynamic polarization behavior were examined of welds of 6082 aluminum alloy plate of 8 mm in thickness prepared by Friction-stir welding. The results indicated that by rotation speed 1000 r/min, traverse speed 160 mm/min and tilt angle 3° of the sturr rod, the microstructure of the weld had been remarkably reshaped. A dynamical recrystallization took place on the zone of the weld nugget and thereby formed a microstructure with equiaxed grains. The corrosion potential of the welds was much positive than those of parent material, meanwhile, the corrosion current density was less than those of parent material.
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