Topic
Butt welding
About: Butt welding is a research topic. Over the lifetime, 7153 publications have been published within this topic receiving 44467 citations.
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TL;DR: In this article, a laser scanning welding test platform for aluminum alloy was built to solve the problems of poor quality and insufficient joint strength of aluminum alloy weld, and the influence of welding parameters on the weld formation was investigated by the factor variable method.
Abstract: To solve the problems of poor quality and insufficient joint strength of aluminum alloy weld, a laser scanning welding test platform for aluminum alloy was built. Taking the butt welding of 5052 aluminum alloy with 5 mm and 3 mm thick specimens as the research objects, the study of a “∞”-shaped laser scanning welding process was conducted, and the similarities and differences between the welding process and that of single pass laser welding were compared. The influence of “∞”-shaped laser scanning welding parameters on the weld formation was investigated by the factor variable method. The change of the surface morphology and dynamic evolution of the molten pool was observed by a high-speed camera system. The optimal combination of the welding parameters was obtained by an orthogonal test. The research showed that the “∞”-shaped laser scanning welding pool had good stability and a good weld quality. Under suitable welding parameters, the length and width of the molten pool could be increased significantly compared with those of the single pass laser welding. The growth rate of the length and width could reach 110.19% and 57.69%, respectively. The surface of the weld was evenly distributed with dense fish scales, and the porosity was less than 1%. The tensile strength of the specimen could reach 205.242 MPa, which was 93% that of the base metal; the topography of fracture was full of dimples, and the metallographic structure of the weld was fine and distributed with equiaxed dendrites.
41 citations
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41 citations
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TL;DR: In this paper, the authors focused on the two-dimensional thermal elasto-plastic analysis to understand and clarify the mechanical phenomena of thermal ELP behavior on the hybrid welded butt joints.
40 citations
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15 Jun 2010-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, a friction stir butt welding was used to join a bulk metallic glass (BMG) plate and pure copper plates with 2mm in thickness, which reached up to 95% of the pure copper.
Abstract: Zr 55 Cu 30 Al 10 Ni 5 bulk metallic glass (BMG) plate and pure copper plates with 2 mm in thickness were successfully joined by friction stir butt welding. Microstructure characterization revealed that a clear interface between the two materials was formed in the stir zone and no crystallization from the amorphous phase can be detected. On the copper side in the stir zone, a transitional microstructure of refined elongated grain structure, refined equiaxial grain structure and coarse equiaxial grain structure was found varying with the distance from the BMG/Cu interface. The welded joint showed lower hardness than that of the base metals and finally fractured on the copper side in tensile tests. The ultimate tensile strength of the joint was about 253 MPa, which reached up to 95% of the pure copper.
40 citations
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TL;DR: In this paper, a series of experiments were conducted to characterize the propagation of large fatigue cracks in welded stiffened panels, which were incorporated into large box beams loaded in four-point bending.
40 citations