Figure - available from: The International Journal of Advanced Manufacturing Technology
This content is subject to copyright. Terms and conditions apply.
Source publication
The quality of welded joints is affected by microstructure heterogeneity of the weld seam. In this work, the microstructure homogenization of 2A14 aluminum alloy weld seam was achieved by adding ultrasonic irradiation in the metal-inert gas welding (U-MIG). Compared with the traditional MIG, the width and penetration of the weld seam in the U-MIG i...
Similar publications
Citations
... Additionally, the doublepulse ultrasonic welding process decreases variance in the strength of the joints. Fan et al. [5] achieved the microstructure homogenization of aluminum (Al) alloy weld seams by adding ultrasonic irradiation in metal inert gas welding. Results showed that ultrasonic cavitation is the main reason for the microstructure homogenization of columnar grains near the fusion line and conventional metal inert gas is completely transformed into the equiaxed grains under the action of ultrasonic irradiation. ...
Ultrasonic welding (UW) is a joining of plastics through the use of heat generated from high-frequency mechanical motion, which is known as an efficient process in many applications, such as textile, packaging, or automotive. UW of thermoplastics has been widely employed in industry since no polymer degradations are found after UW. However, the trial-and-error approach is frequently used to study optimum UW process parameters for new 3C plastic power cases in current industry, resulting in random efforts, wasted time, or energy consumption. In this study, Taguchi methods are used to study optimum UW process parameters for obtaining high weld strength of a plastic power case. The most important control factor influencing the weld strength is amplitude, followed by weld pressure, hold time, and trigger position. The optimum UW process parameters are amplitude of 43.4 µm, weld pressure of 115 kPa, hold time of 0.4 s, and trigger position of 69.95 mm. Finally, the confirmation experiments are performed to verify the optimum process parameters obtained in this study.
... Aluminum alloys generally have welding defects such as hot cracks and porosity. Different types of aluminum alloys also have different problems during the welding process [1][2][3][4][5]. ...
With the development of aerospace, marine engineering, and other industries, aluminum alloys are widely used. There are welding defects in the traditional welding method for welding aluminum alloys. This article discusses an advanced method based on traditional welding methods, which can effectively reduce the probability of defect occurrence. In these methods, welding with an external magnetic field can promote the formation of equiaxed crystals during crystallization, grain refinement, and improved weld performance. The porosity is reduced and the sensitivity to thermal cracking is reduced. The future development direction of aluminum alloy welding is discussed at the end of the article.
This paper focuses on pulse metal inert gas welding (P-MIG) and cold metal transfer (CMT) of 6082-T6 aluminium alloy. The microstructure and properties of joints were analysed and the phase transformation of the welding zones (WZ) was calculated using JMatPro. The results showed that CMT joints are better than P-MIG joints in tensile strength and hardness. The main reason is that the average grain size and the second phase size of CMT joints are smaller than those of P-MIG joints. Moreover, the larger number of large-angle grain boundaries (LAGB), diffusely distributed Al 3 Mg 2 and Al 6 Mn phases in CMT WZ, as well as a small amount of distributed Al 3 Zr, are beneficial to the joints properties too.
The wire arc additive manufacturing (WAAM) method has a high material utilization rate and is superior to the casting method. However, the higher the dimensional accuracy required for additive manufacturing components and the more complex the components are, the more difficult it is to guarantee their quality. The subsequent processing requires a large amount of labor cost. In this study, a track optimization method is proposed to achieve the quality control of 2319 aluminum alloy additive manufacturing components, which can improve the forming accuracy and optimize the component performance. The experimental results show that multi-track stacking can effectively reduce the heat accumulation in the deposition process. The component forming accuracy is improved by about 70%, the tensile strength by about 6% and the yield strength by about 15%. The influence of deposition track on the forming accuracy and quality of WAAM components has rarely been studied.
