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Technique Reduces Warpage in Laser Powder Bed Fusion

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In laser powder bed fusion (LPBF) for the additive manufacture of metal parts, local high-temperature molten metal fits the surrounding solid part as a result of thermal expansion. As a negative byproduct of this process, the molten metal generates a negative thermal stress following solidification, which produces an in-plane residual stress. This residual stress accumulates toward the upper layer with the repetitive formation process on each layer and often leads to undesirable effects such as delamination, cracking, and warpage. Moreover, residual warpage and deformation are...Read full article

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    Published: November 2022
    Glossary
    additive manufacturing
    Additive manufacturing (AM), also known as 3D printing, is a manufacturing process that involves creating three-dimensional objects by adding material layer by layer. This is in contrast to traditional manufacturing methods, which often involve subtracting or forming materials to achieve the desired shape. In additive manufacturing, a digital model of the object is created using computer-aided design (CAD) software, and this digital model is then sliced into thin cross-sectional layers. The...
    laser powder bed fusion
    Laser powder bed fusion (LPBF) is a type of additive manufacturing (AM) or 3D printing technology that uses a high-power laser to selectively fuse or melt layers of powdered material to build up a three-dimensional object. This process is particularly common in metal additive manufacturing, where it is sometimes referred to as selective laser melting (SLM) or direct metal laser sintering (DMLS). Key features of laser powder bed fusion include: Powder bed: The process begins with a thin...
    3d printing
    3D printing, also known as additive manufacturing (AM), is a manufacturing process that builds three-dimensional objects layer by layer from a digital model. This technology allows the creation of complex and customized structures that would be challenging or impossible with traditional manufacturing methods. The process typically involves the following key steps: Digital design: A three-dimensional digital model of the object is created using computer-aided design (CAD) software. This...
    Research & TechnologyLasersadditive manufacturinglaser powder bed fusionLPBFmetal3d printingmanufacturingweldingresidual stresswarpWaseda UniversityUniversity of PittsburghAmericasJapanAsia-PacificTechnology News

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