摘要
采用搅拌摩擦焊对Si Cp/Al复合材料和铝合金异种材料的搭接进行了研究,并用光学显微镜和电子万能试验机对焊缝组织及力学性能进行了分析测试。结果表明:在合适的工艺参数下,可以获得较好的焊缝成形和无缺陷的焊缝组织。焊核区形成了明显的洋葱环形貌,洋葱环下方是搭接区,其中Si C颗粒细小,分布均匀,由搭接区下部到上部Si C颗粒呈梯度过渡。随焊接速度增加,搭接区Si C颗粒尺寸有所增加,在焊接速度为80mm/min时有裂纹形成,而焊缝力学性能也有所下降。在焊接速度为10mm/min时,焊缝抗剪强度较高,达到81.8MPa。
Dissimilar FSWed lap joint of Si Cp/Al composite to 2024 aluminum alloy is produced, the microstructure and mechanical properties of the joint is observed and examined, respectively. Results show that, the defect-free weld with good crown appearance can be achieved under suitable welding parameters. In WNZ, formation of onion rings can be seen clearly, under which is the lap zone with Si C particles in small sizes and homogeneous distribution. From the lower to the upper side of lap zone, the gradient microstructure is present. With the increase of the welding speed, the size of Si C particles in lap zone increases a little, and crack can be observed in 80mm/min. The shear tensile strength of the joint decreases with the welding speed increasing, and a joint strength of 81.8MPa can be achieved under the welding speed 10mm/min.
出处
《航空制造技术》
2016年第1期139-142,共4页
Aeronautical Manufacturing Technology
基金
国防基础科研项目(A0320110014)
上海市优秀技术带头人项目(13XD1421300)资助
