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The Dawn Of 3D Printing: 3D Printing High-Strength Aluminum Alloy

wallpapers News 2020-11-17
Metal-based additive manufacturing or 3D printing is a potential breakthrough technology in multiple industries including aerospace, biomedicine and automotive industries. Building metal components layer by layer can increase design freedom and manufacturing flexibility, thereby realizing complex geometric shapes, increasing product customization, shortening time to market, and eliminating traditional economies of scale constraints. At present, only a few alloys, including AlSi10Mg, TiAl6V4, CoCr and Inconel 718, can be 3D printed, and most of them cannot be successfully manufactured.
The University of California John H. Martin et al. published an article entitled "3D printing of high-strength aluminium alloys" in Nature. The research team introduced a controlled solidification nanoparticle nucleating agent in the additive manufacturing process to solve the intolerable microstructure with large columnar grains and periodic cracks caused by melting and solidification dynamics.

After using a nucleating agent, high-strength aluminum alloys that are incompatible with additive manufacturing can be successfully processed by selective laser melting without cracks and equiaxed, achieving a fine-grained microstructure and achieving material strength equivalent to forging materials. The additive manufacturing method is suitable for various alloys and can be implemented using a series of 3D printing machines, providing a basis for a wide range of industrial applications.

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