An additive manufacturing apparatus comprises a processing chamber (100) defining a window (110) for receiving a laser beam and an optical module (10) The optical module is removably-mountable to the processing chamber for delivering the laser beam through the window. The optical module contains optical components for focusing and steering the laser beam and a controlled atmosphere can be maintained within the module.

An additive manufacturing apparatus comprises a processing chamber (100) defining a window (110) for receiving a laser beam and an optical module (10) The optical module is removably-mountable to the processing chamber for delivering the laser beam through the window. The optical module contains optical components for focusing and steering the laser beam and a controlled atmosphere can be maintained within the module.

A method for machining a ceramic matrix composite (CMC), the method enhancing a machining speed for the ceramic matrix composite (CMC), includes: a step of scanning an irradiated portion of a surface of a machining target material by a laser head to irradiate the irradiated portion with laser light from the laser head, and forming a deteriorated layer on the irradiated portion of the surface of the machining target material; and a step of sequentially removing the deteriorated layer by an end mill, the deteriorated layer being formed on the irradiated portion, wherein the deteriorated layer is formed by heating the irradiated portion up to a predetermined temperature by irradiation of continuous oscillation laser light, and by forming a crack by irradiation of pulsed oscillation laser light.

Provided are an article and a method of forming an article. The method includes providing a metallic powder, heating the metallic powder to a temperature sufficient to joint at least a portion of the metallic powder to form an initial layer, sequentially forming additional layers in a build direction by providing a distributed layer of the metallic powder over the initial layer and heating the distributed layer of the metallic powder, repeating the steps of sequentially forming the additional layers in the build direction to form a portion of the article having a hollow space formed in the build direction, and forming an overhang feature extending into the hollow space. The article includes an article formed by the method described herein.

Provided are an article and a method of forming an article. The method includes providing a metallic powder, heating the metallic powder to a temperature sufficient to joint at least a portion of the metallic powder to form an initial layer, sequentially forming additional layers in a build direction by providing a distributed layer of the metallic powder over the initial layer and heating the distributed layer of the metallic powder, repeating the steps of sequentially forming the additional layers in the build direction to form a portion of the article having a hollow space formed in the build direction, and forming an overhang feature extending into the hollow space. The article includes an article formed by the method described herein.

A deposition apparatus and a deposition method are described. The deposition apparatus includes an accommodating element, a plurality of lasers and a carrier. The accommodating element is configured to accommodate a material. The lasers are disposed at a periphery of the accommodating element, and are configured to simultaneously emit a plurality of laser beams toward the material to melt the material to form a deposition liquid. The carrier is disposed under the accommodating element and the lasers, and are configured to carry the deposition liquid.

A deposition apparatus and a deposition method are described. The deposition apparatus includes an accommodating element, a plurality of lasers and a carrier. The accommodating element is configured to accommodate a material. The lasers are disposed at a periphery of the accommodating element, and are configured to simultaneously emit a plurality of laser beams toward the material to melt the material to form a deposition liquid. The carrier is disposed under the accommodating element and the lasers, and are configured to carry the deposition liquid.

A method of forming a tubular structure including a first tube and a second tube. The steps of the method include first successively depositing layers of a first material and at least partially melting at least a portion of each deposited layer of the first material at predetermined locations to form the first tube. Second, successively depositing layers of a second material and at least partially melting at least a portion of each deposited layer of the second material at additional predetermined locations to form the second tube, wherein the second tube is attached to the first tube at an intersection. Additionally, at least partially melting steps include forming portions of a plurality of segments, and the first tube and the second tube share segments of the plurality of segments at their intersection.

A method of forming a tubular structure including a first tube and a second tube. The steps of the method include first successively depositing layers of a first material and at least partially melting at least a portion of each deposited layer of the first material at predetermined locations to form the first tube. Second, successively depositing layers of a second material and at least partially melting at least a portion of each deposited layer of the second material at additional predetermined locations to form the second tube, wherein the second tube is attached to the first tube at an intersection. Additionally, at least partially melting steps include forming portions of a plurality of segments, and the first tube and the second tube share segments of the plurality of segments at their intersection.

A method and system to manufacture workpieces employing a high intensity energy source to create a puddle and at least one resistively heated wire which is heated to at or near its melting temperature and deposited into the puddle as droplets.