FIELD

Embodiments described herein relate generally to an additive manufacturing apparatus and an additive manufacturing method.

BACKGROUND

Conventionally, there has been known an additive manufacturing apparatus to form an additive manufactured object. The additive manufacturing apparatus forms a layer by melting a powder material by a laser beam, and forms the additive manufactured object having a three-dimensional shape by stacking the layers.

A manufactured object which is manufactured by such an additive manufacturing apparatus may contain an abnormal area such as a bubble generated during manufacture. It is significant to obtain an additive manufacturing apparatus and an additive manufacturing method which allow detection of abnormality in such a manufactured object.

DETAILED DESCRIPTION

In general according to one embodiment, an additive manufacturing apparatus includes a manufacturing unit, an elastic wave generation unit, an elastic wave detection unit, and an inspection unit. The manufacturing unit sequentially stacks a layer formed by irradiating a material with a first energy beam and solidifying the material. The elastic wave generation unit emits a second energy beam to a manufactured object including the layer and generates an elastic wave propagating in the manufactured object. The elastic wave detection unit detects the elastic wave. The inspection unit inspects the manufactured object on the basis of a detection result from the elastic wave detection unit.

