Study on Dimensional Rule and Properties of Aluminum Alloy Additive Manufacturing with Inclined Substrate

doi:10.3901/JME.2025.01.326

Abstract

Abstract: Arc additive manufacturing has high efficiency and low cost, and can realize rapid forming of aluminum alloy. However, considering the actual conditions of the workpiece to be repaired are complicated, the volume is too large and difficult to carry or disassemble, it is necessary to study the arc additive manufacturing process under the inclined state. 5083 aluminum alloy is prepared on a 45° inclined substrate by MIG arc additive manufacturing process. The effects of various parameters (welding current I, welding speed v, welding torch height L) on the forming size (welding width W, layer height H, peak offset μ) during arc additive manufacturing are studied by combining experiments and mathematical models. The porosity defects, Mg content and mechanical properties of 5083 aluminum alloy are studied by means of tensile test and scanning electron microscopy (SEM). The results show that the prediction effect of the mathematical model is more accurate, and the influence law of each parameter is verified by the experiment. The welding current has the greatest influence on the welding width, the welding speed has the greatest influence on the height of the welding torch under the inclined substrate. The aluminum alloy structure made by coupling parameters has good forming, good dimensional stable interlayer fusion and no obvious cracks. The fracture morphology, fracture mode and porosity distribution of 5083 aluminum alloy manufactured under inclined substrate show different degrees of anisotropy at different positions. The average transverse tensile strength is 330 MPa and the maximum elongation is 16.67%; the average longitudinal tensile strength is 296 MPa and the maximum elongation is 15.11%. It can be considered that the transverse tensile property is better than the longitudinal tensile property.

Key words: inclined substrate, microgravity, additive manufacturing, orthogonal test, molding size, mechanical properties

CLC Number:

TG444

YANG Chaoxiong, ZHANG Zhaodong, SHA Yuyao, LIU Liming. Study on Dimensional Rule and Properties of Aluminum Alloy Additive Manufacturing with Inclined Substrate[J]. Journal of Mechanical Engineering, 2025, 61(1): 326-334.

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