Mechanical properties of underwater friction stir welded 2219 aluminum alloy

• Published in: Transactions of Nonferrous Metals Society of China Vol. 20; no. 8; pp. 1387 - 1391
• Main Author: 刘会杰 张会杰 黄永宪 于雷
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.08.2010; State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China
• Subjects: 2219铝合金; aluminum alloy; Aluminum base alloys; Deterioration; Fracture mechanics; Friction stir welding; mechanical property; MPa; Plasticity; Tensile strength; Underwater; underwater friction stir welding; Water cooling; 力学性能; 拉伸强度; 拉伸试验; 搅拌摩擦焊接; 焊接温度; underwater friction stir welding; aluminum alloy; mechanical property
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(09)60309-5

Underwater friction stir welding of 2219 aluminum alloy was carried out in order to further improve the joint performances by varying welding temperature history. The results indicated that the tensile strength of the joint can be improved from 324 MPa by external water cooling action in normal to 341 MPa. However, the plasticity of the joint is deteriorated. The underwater joint tends to fracture at the interface between the weld nugget zone and the thermal mechanically affected zone on the advancing side during tensile test, which is significantly different from the normal joint.