航空航天用脉冲激光焊接5052-H32铝合金薄板的外观、显微组织和力学性能

• Published in: 中国有色金属学报（英文版） Vol. 29; no. 4; pp. 667 - 679
• Main Authors: T. E. ABIOYE, H. ZUHAILAWATI, S. AIZAD, A. S. ANASYIDA
• Format: Journal Article
• Language: Chinese
• Published: Structural Materials Niche Area, School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia 2019; Industrial and Production Engineering Department, School of Engineering and Engineering Technology, Federal University of Technology Akure, PMB 704, Akure, Ondo State, Nigeria%Structural Materials Niche Area, School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
• Subjects: 显微组织; microstructure; thin sheet; 脉冲激光焊接; 薄板; solidification cracking; mechanical properties; 力学性能; 金属间化合物; aluminium alloy; 凝固裂纹; pulse laser welding; intermetallic compound; 铝合金
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(19)64977-0

制备0.6 mm厚的AA5052-H32铝合金薄板,研究符合航空航天工业AWS D17.1规范的脉冲激光焊接工艺的最佳参数,如激光脉冲电流、脉冲频率和脉冲持续时间.研究焊缝的显微组织和力学性能,确定参数与焊缝几何形状的关系.在高脉冲能量(25 J)、高平均峰值功率(4.2 kW)和低脉冲能量(17.6 J)、低平均峰值功率(2.8 kW)两种条件下可获得满足AWS D17.1要求的无凝固裂纹的优质焊缝.在较低热量输入下形成的焊缝具有更细小的枝晶结构,且焊缝中Mg的蒸发和硬质相化合物(Al0.5Fe3Si0.5)的形成减少.因此,与在较高热量输入下形成的焊件相比,在较低热量输入下形成的焊件的抗拉强度(168 MPa)提高1.15倍,但其接头处的硬度(111 HV0.1)下降约29％.总之,为了获得满足AWS D17.1要求的0.6 mm厚AA5052-H32脉冲激光焊接接头,选择合适的参数至关重要.