Improving mechanical properties of wire‐based EBAM
            <scp>Ti‐6Al‐4V</scp>
            parts by adding
            <scp>TiC</scp>
            powders

Panin, A. V.; Kazachenok, Marina; Sinyakova, E. A.; Builuk, Artem; Martynov, Sergey; Panin, S. V.; Berto, Filippo

doi:10.1002/mdp2.136

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…Electron beam additive manufacturing (EBAM) uses metal wires or strips as raw materials to rapidly form metal components with mechanical properties equivalent to castings, and is widely used in the rapid manufacturing of precision blanks for large parts, such as aerospace, automobile manufacturing, etc. [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. However, with the increase of the area of the forming area, the temperature gradient at both ends of the scanning line increases sharply [ 8 , 9 , 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Slicing Algorithm and Partition Scanning Strategy for 3D Printing Based on GPU Parallel Computing

Lai

Wei

2021

Materials

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Aiming at the problems of over stacking, warping deformation and rapid adjustment of layer thickness in electron beam additive manufacturing, the 3D printing slicing algorithm and partition scanning strategy for numerical control systems are studied. The GPU (graphics processing unit) is used to slice the 3D model, and the STL (stereolithography) file is calculated in parallel according to the normal vector and the vertex coordinates. The voxel information of the specified layer is dynamically obtained by adjusting the projection matrix to the slice height. The MS (marching squares) algorithm is used to extract the coordinate sequence of the binary image, and the ordered contour coordinates are output. In order to avoid shaking of the electron gun when the numerical control system is forming the microsegment straight line, and reduce metal overcrowding in the continuous curve C0, the NURBS (non-uniform rational b-splines) basis function is used to perform curve interpolation on the contour data. Aiming at the deformation problem of large block components in the forming process, a hexagonal partition and parallel line variable angle scanning technology is adopted, and an effective temperature and deformation control strategy is formed according to the European-distance planning scan order of each partition. The results show that the NURBS segmentation fits closer to the original polysurface cut line, and the error is reduced by 34.2% compared with the STL file slice data. As the number of triangular patches increases, the algorithm exhibits higher efficiency, STL files with 1,483,132 facets can be cut into 4488 layers in 89 s. The slicing algorithm involved in this research can be used as a general data processing algorithm for additive manufacturing technology to reduce the waiting time of the contour extraction process. Combined with the partition strategy, it can provide new ideas for the dynamic adjustment of layer thickness and deformation control in the forming process of large parts.

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Section: Introductionmentioning

confidence: 99%

Slicing Algorithm and Partition Scanning Strategy for 3D Printing Based on GPU Parallel Computing

Lai

Wei

2021

Materials

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Controlling the Structure and Properties of Metal- and Polymer-Based Composites Fabricated by Combined 3D Methods

Knyazeva

Panin

Anisimova

et al. 2023

Advanced Structured Materials

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Effects of Water Cooling on the Microstructure of Electron Beam Additive-Manufactured Ti-6Al-4V

Панин

Martynov

Kazachenok

et al. 2021

Metals

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The inferior mechanical properties of EBAM Ti-6Al-4V samples are due to the coarse columnar grains containing coarse lamellar structures. One can expect that water cooling of the build platform will increase the cooling rate of the molten pool during the build-up process, causing microstructure refinement. In the present work, the substrate cooling effects on the microstructure and phase composition of EBAM Ti-6Al-4V samples are studied using optical, scanning electron, and scanning transmission microscopy, as well as X-ray diffraction analysis. It is shown that the microstructure of the EBAM Ti-6Al-4V samples built on the substrate without water cooling consists predominantly of columnar prior β grains with lateral sizes ranging up to 2000 µm, while cooling of the build platform causes the appearance of equiaxed prior β grains measuring 1000 µm. Moreover, the refinement of the martensite structure and the precipitation of α′′ martensite platelets within α laths occur in the EBAM Ti-6Al-4V samples built on the water-cooled build platform. An explanation of the mechanisms underlying the α′→α + β and α′→α + α′′ + β transformations during the building process is provided based upon ab initio calculations. The fragmentation of the α laths under the residual compressive stresses is discussed.

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Improving mechanical properties of wire‐based EBAM Ti‐6Al‐4V parts by adding TiC powders

Cited by 3 publications

References 16 publications

Slicing Algorithm and Partition Scanning Strategy for 3D Printing Based on GPU Parallel Computing

Slicing Algorithm and Partition Scanning Strategy for 3D Printing Based on GPU Parallel Computing

Controlling the Structure and Properties of Metal- and Polymer-Based Composites Fabricated by Combined 3D Methods

Effects of Water Cooling on the Microstructure of Electron Beam Additive-Manufactured Ti-6Al-4V

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