Demo
    Black and white image showing a close-up of a thin layer with a crack or tear forming a downward pointing shape in the middle.
    Researchers are creating and examining images of vapor trenches formed in microscopic molten pools of metal created during laser powder bed fusion. This image, created with a high-energy X-ray beam, shows a vapor trench, also known as a keyhole, about 200 microns deep, created as a laser moved from left to right over a layer of metallic powder.