Inconel 718 (BJT)

Inconel 718 made by metal binder jetting is the nickel-chromium-iron superalloy formed by binding alloy powder layer by layer, then debinding and sintering the fragile green part. Sintering causes substantial, fairly uniform shrinkage that the design must allow for, and some residual porosity usually remains. With no melt pool, there is little thermal residual stress, less anisotropy than in laser-melted material, and generally no supports, though surfaces are rough. Parts usually need solution treatment and aging, sometimes hot isostatic pressing, and machining of critical features. Typical uses are batches of complex components for high-temperature service, such as turbomachinery and fluid-handling parts.