The report meeting for a key project under the National Military Science and Technology Commission Project, titled "Construction of an Additive Manufacturing High-Performance Special Steel Integrated Computational Platform," took place on August 01, 2021, at University of Science and Technology Beijing. The meeting was organized both online and offline by Materials design and optimization Institute of the Collaborative Innovation Center of Steel Technology. Professor Su Jie, the Chief Researcher, attended the meeting to provide guidance. Participants included teachers and graduate students from participating units, including University of Science and Technology Beijing, the Iron & Steel Research Institute, and the Institute of Mechanical Manufacturing Technology at the China Academy of Engineering Physics.

The project focuses on two breakthrough methodologies in materials research, namely Integrated Computational Materials Engineering (ICME) and Materials Genome Engineering (MGE). These methodologies are aimed at improving the efficiency of materials research, reducing costs, and shortening the research and development cycle. The project aims to construct an integrated computational platform for additive manufacturing of special steel, enabling prediction of microstructure and performance throughout the additive manufacturing process. This will result in the creation of a database for special steel, serving the design and optimization of high-performance special steels.

At the start of the meeting, Professor Su Jie emphasized that the goal of this project is to build an integrated computational platform for additive manufacturing of special steel, which is at the forefront of international research and holds significant practical value. Professor Yin Haiqing stressed that the project covers multiscale computation and data transfer and storage. Therefore, all module team members need to collaborate to achieve the goal of constructing the integrated computational platform and serving the design of additive manufacturing materials.

During the reporting phase of the meeting, Dr. Yong Xi from the Iron & Steel Research Institute presented research related to additive manufacturing of oxides and database design. She detailed the impact of various elements on oxide formation and designed a formatting storage mode for experimental and simulation data. Dr. Wang Guowei from the China Academy of Engineering Physics introduced additive manufacturing temperature field simulation work, covering research background, model construction, COMSOL software simulation and interface implementation, and simulation of the temperature field in single-pass/multi-pass moving melt pools, providing crucial data support for melt pool temperature evolution and cyclic phase transformation. Professor Zhang Ruijie from University of Science and Technology Beijing reported on the molecular dynamics simulation of the oxide nucleation process in laser melt pools. The research predicted the binding tendencies between different types of oxides and the steel matrix. Simulations were also conducted for melt pool and columnar crystal morphology under micro-convection conditions, providing input for downstream phase organization and mechanical calculations. Dr. Zhang Cong from University of Science and Technology Beijing reported the perspectives of model theory, additive manufacturing columnar dendritic segregation, and material intrinsic parameters, offering calculation functions for the integrated computational platform, such as solidification phase composition distribution, alloy crack propensity, martensite transformation point, yield strength. Dr. Wang Yongwei from University of Science and Technology Beijing reported on the simulation of microstructures and mechanical properties in additive manufacturing, using crystal plasticity finite element methods and constitutive relationships, investigating non-equilibrium microstructures and mechanical anisotropy in additive manufacturing.

Professor Song Yong from University of Science and Technology Beijing presented the overall architecture, platform system construction, and design development progress of the platform. The simulation platform includes user interface, computational simulation, data transfer, and database storage functions. Professor Yin Haiqing from University of Science and Technology Beijing reported recent characterization work on additive manufacturing special steel printed parts, analyzing aspects such as post-printing grain orientation, melt pool morphology, fracture crack propagation, oxides and inclusion distribution.

In conclusion, Professor Su Jie, the project's chief, provided an overall requirement and deployment plan for the construction of the integrated computational platform for additive manufacturing special steel and offered valuable suggestions for integrated computation and database construction. The project team members will work diligently under the guidance of the project group to build a platform that serves additive manufacturing of special steels.