Affiliation:
1. South Ural State University (National Research University)
2. South Ural State University (National Research University
Abstract
Al alloys are widely explored in the development of Wire Arc Additive Manufacturing (WAAM) layered electric arc growth technology, which are dynamic in the field of additive manufacturing. In this study, Al‒Si wire samples were produced by layered arc growth technology and different welding sequence. Impact toughness tests at the test temperature of ‒60 °C and microstructure of the clad alloy were carried out. The results of the impact toughness test at a test temperature of ‒60 °C averaged 20.4 and 18.6 J/cm2 for the samples by welding sequence Nos. 1 and 2, respectively. The structure of clad Al‒Si alloys consists of equiaxed dendrites of α-solid solution and eutectic (α + Si) in the interdendritic region. During remelting of the preceding layer, the size of the dendrites increases as a result of thermal effects. Larger dendrites are observed in the remelted predecessor layer of clad sample No. 2. The obtained results indicate the possibility of using the technology of layered electro-arc growth of Al‒Si alloy, and predominantly by the welding sequence No. 1, to create products operating at low temperatures, taking into account the control of the order of overlaying layers to reduce defects in the clad metal and the establishment of a tolerance for machining at the edges of the clad layers due to the presence of diffuse pores
Funder
Ministry of Science and Higher Education of the Russian Federation
Publisher
South Ural State University
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