“…Reprinted from [100], Copyright (2022), with permission from Elsevier. Reprinted from [101], Copyright (2022), with permission from Elsevier. Reprinted from [102], Copyright (2021), with permission from Elsevier.…”
Section: Summary On the Performance Enhancement Of Efed Am Methodsmentioning
Metal additive manufacturing (AM) technologies have made significant progress in the basic theoretical field since their invention in the 1970s. However, performance instability during continuous processing, such as thermal history, residual stress accumulation, and columnar grain epitaxial growth, consistently hinders their broad application in standardized industrial production. To overcome these challenges, performance-control-oriented hybrid AM (HAM) technologies have been introduced. These technologies, by leveraging external auxiliary processes, aim to regulate microstructural evolution and mechanical properties during metal AM. In this context, HAM technologies for molten pool regulation and solidified material deformation are identified as energy field-assisted AM (EFed AM, e.g., ultrasonic, electromagnetic, heat, etc.) technologies and interlayer plastic deformation-assisted AM (IPDed AM, e.g., laser shock peening, rolling, ultrasonic peening, friction stir process, etc.) technologies, respectively. A detailed and systematic review of performance-control-oriented HAM technologies is then provided. This review covers the influence of external energy fields on the melting, flow, and solidification behavior of materials, and the regulatory effects of interlayer plastic deformation on grain refinement, nucleation, and recrystallization. Furthermore, the role of performance-control-oriented HAM technologies in managing residual stress conversion, metallurgical defect closure, mechanical property improvement, and anisotropy regulation is thoroughly reviewed and discussed. The review concludes with an analysis of future development trends in EFed AM and IPDed AM technologies.
“…Reprinted from [100], Copyright (2022), with permission from Elsevier. Reprinted from [101], Copyright (2022), with permission from Elsevier. Reprinted from [102], Copyright (2021), with permission from Elsevier.…”
Section: Summary On the Performance Enhancement Of Efed Am Methodsmentioning
Metal additive manufacturing (AM) technologies have made significant progress in the basic theoretical field since their invention in the 1970s. However, performance instability during continuous processing, such as thermal history, residual stress accumulation, and columnar grain epitaxial growth, consistently hinders their broad application in standardized industrial production. To overcome these challenges, performance-control-oriented hybrid AM (HAM) technologies have been introduced. These technologies, by leveraging external auxiliary processes, aim to regulate microstructural evolution and mechanical properties during metal AM. In this context, HAM technologies for molten pool regulation and solidified material deformation are identified as energy field-assisted AM (EFed AM, e.g., ultrasonic, electromagnetic, heat, etc.) technologies and interlayer plastic deformation-assisted AM (IPDed AM, e.g., laser shock peening, rolling, ultrasonic peening, friction stir process, etc.) technologies, respectively. A detailed and systematic review of performance-control-oriented HAM technologies is then provided. This review covers the influence of external energy fields on the melting, flow, and solidification behavior of materials, and the regulatory effects of interlayer plastic deformation on grain refinement, nucleation, and recrystallization. Furthermore, the role of performance-control-oriented HAM technologies in managing residual stress conversion, metallurgical defect closure, mechanical property improvement, and anisotropy regulation is thoroughly reviewed and discussed. The review concludes with an analysis of future development trends in EFed AM and IPDed AM technologies.
“…All the used parameters are listed in Table S2. Scanning speed and oscillating parameters were selected according to our previous work [21].…”
Section: Materials and Experimental Proceduresmentioning
confidence: 99%
“…All the used parameters are listed in Table S2. Scanning speed and oscillating parameters were selected according to our previous work [21]. Figure 1 Schematic diagram of the oscillating laser-arc hybrid additive manufacturing system used in this work.…”
Section: Materials and Experimental Proceduresmentioning
In this work, TiC nanoparticles (TiC ps ) reinforced 7075 aluminium alloy was fabricated via an oscillating laser-arc hybrid additive manufacturing process. To show the beneficial effect of TiC ps addition on microstructure and mechanical properties, a conventional 7075 aluminium alloy was also manufactured for comparison. Upon the addition of TiC ps , remarkable grain refinement was achieved with a decrease in average grain size from 111.8 to 12.5 µm, and grain boundary segregation was alleviated. It was also found that many secondary phases precipitated at the grain interior in the deposit with TiC ps . Owing to the refined microstructure and favourable precipitation, as-deposited 7075 aluminium alloy with TiC ps showed enhanced tensile properties of ultimate tensile strengths of 346 and 355 MPa along scanning and build directions.
“…Ma developed an oscillating laser arc hybrid additive manufacturing process to manufacture Al-Mg-Sc alloy containing rare earth element. It was found that the porosity was significantly reduced due to the stirring effect of the beam in the melt pool, and the microstructure was refined and homogenized, resulting in higher elongation and lower anisotropy [18].…”
Particulate reinforced composites are expected to solve the problem of grain growth and strength reduction caused by multiple thermal cycles during additive manufacturing. In this work, TiB 2 /2319Al composite was fabricated by oscillating laser-arc hybrid additive manufacturing (O-LAHAM). The microstructure, mechanical properties and fracture of tensile samples were studied. The results show that TiB 2 /2319Al composites were composed of fine equiaxed grains due to the stirring effect of laser beam and the particle strengthening effect of TiB 2 . Although ultimate tensile strength (UTS) of the TiB 2 /2319Al composite did not increase significantly, it had a higher yield strength (YS), especially stimulated by T6 heat treatment. Compared with 2319 aluminum alloy, YS of the as-deposited and heat-treated composites was 137 MPa and 355 MPa, respectively, which increased by 19% and 10%. However, the elongation decreased significantly, which is caused by the presence of micro pores that promoted crack propagation.
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