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What are additive manufactured alloys for hydrogen embrittlement? 

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Additive manufactured alloys for hydrogen embrittlement include a high strength Zr or Cr-added aluminum alloy with coherent Al3Zr or incoherent Al18Mg2Cr3 dispersoids, respectively . Another metallic material with excellent hydrogen embrittlement resistance is a metal powder bonded body manufactured by incrementally adding metal powder layer by layer . Additionally, additively manufactured maraging steel has been investigated for its microstructures and mechanical properties before and after hydrogen charging . The hydrogen-charged maraging steel specimen experiences severe hydrogen embrittlement, resulting in a decline in strength and plasticity. The mechanism of ductile-to-brittle transition in the hydrogen-charged specimen involves martensitic transformation and hydrogen-induced microcracks .

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Can additive manufacturing make two metals together?5 answersAdditive manufacturing can be used to create joints between two different metallic materials, with the porosity of the joint being less than 0.1 percent by volume. Metals can also be deposited on components made by 3D printing with a water-soluble polymer, providing a low-cost alternative to 3D printing directly using metal. An example method for additive manufacturing of metals involves spreading a build material in layers and using radiated energy to cause a consolidating transformation of the build material. Additive manufacturing processes can be used to deposit metallic conductors as contiguous metal traces, even when dielectric materials are present. Overall, additive manufacturing has the potential to join two metals together and create complex metal components using various techniques and materials.
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