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In order to achieve effective design of additive manufacturing nickel-base high-temperature alloys with good usability, a new type of nickel-base high-temperature alloy was developed by combining effective component screening and local element segregation, which has excellent formability, wide process applicability, and low defect density. Through first principles calculations and experimental characterization, it has been confirmed that controlling the distribution of Boron (B) at the interface of MC carbides and γ phase matrix can effectively suppressing the formation of cracks induced by Boron (B) segregation. Meanwhile, the mechanical properties of this alloy are comparable or even superior to existing traditional high-temperature alloys. This method solves the problem of element segregation in additive manufacturing process and can be extended to control the distribution of other key elements, providing a new approach for designing new Ni high-temperature alloys with printability and balanced mechanical properties. Edited from “Robust additive manufacturable Ni superalloys designed by the integrated optimization of local elemental segregation and cracking susceptibility criteria”on 《Acta Materialia》 Ni-base high-temperature alloys, which can be used in aviation and aerospace applications, have become potential materials for additive manufacturing (AM), and the components produced have complex geometric shapes and sizes. However, high cooling rates and spatially variable temperature

SEBM additive manufacturing technology is one of PBF technologies, which use electronic beam as heating resource. The principle is to use high-energy electron beams to scan and heat the metal powders at high speed under vacuum protection, melt layer by layer, stack layer by layer, then directly form the required components. This technology has the characteristics of high energy utilization efficiency, fast scanning speed, high forming efficiency and high powder bed temperature during the forming process, particularly suitable for forming the parts which require the forming process in a vacuum environment, and the material with high melting point, high activity, brittleness, and difficulty in processing, as well as high reflection for laser. and it has been widely used in the fields such as biomedical, aerospace, and automotive. Compared to laser selective melting forming technology (SLM), powder bed electron beam 3D printing technology (SEBM) has the following significant advantages: Series production of standardized bone trabecular acetabular cups by SEBM printing technology: Sailong AM independently develops electron beam additive manufacturing equipment and processes and help our customer to establishe a standardized bone trabecular acetabular cup batch additive manufacturing production line for medical implants. With domestically produced additive manufacturing equipment, raw materials, and

Mr. Chen Huanming’s team investigated the micro-structure characteristics of a kind of superallowy powders (similar to Rene 95) prepared by plasma rotating electrode processing (PREP) by using SEM and calculated the relation between cooling rate and particle size distribution. The results indicate that the solidification micro-structure of particle surface are dendrite and cellular structures. With decreasing of particle size, the particle interior micro-structures change from dendrite in major to cellular and micro-crystal structures. This has important guiding significance for producing high-quality metal powders using the PREP method.