To provide a turbine rotor which enables mass production with a low-cost apparatus and which capable of suppressing leaning of the rotor shaft after welding to improve the yield, while a turbine blade rotor 12 and the rotor shaft 14 are fit to each other with concave and convex portions 12a and 14a and are permitted to be rotated, laser beam L from a laser beam generating device 30 is applied to a joint face 16 along the circumferential direction to weld the welding portion. Then, laser beam L is polarized to temper a region X on the rotor shaft side containing the welding portion with laser beam L. In contrast to residual stress R.sub.1 having a local angular distribution generated during the welding, residual stress R.sub.2 is permitted to be generated over the entire circumference by tempering. Leaning of the rotor shaft 14 after cooling is thereby be suppressed.

An additive manufacturing system including a two-dimensional energy patterning system for imaging a powder bed is disclosed. Improved structure formation, part creation and manipulation, use of multiple additive manufacturing systems, and high throughput manufacturing methods suitable for automated or semi-automated factories are also disclosed.

A method and apparatus for forming an object by additive layer manufacturing. The method comprises: a) applying, by a heat source (4), heat to a portion of a surface of a workpiece (1) sufficient to melt said portion; b) adding material to the melted portion and moving the heat source (4) relative to the workpiece (1) whereby progressively to form a layer of material (10) on the workpiece (1); c) cooling the formed layer (10) to bring at least part of the layer (10) to a state of crystallisation, there producing a modified workpiece; d) peening, using a plurality of independently controllable impact treatment devices (7), the modified work-piece so as to plastically deform the cooled at least part of the layer (10); and repeating steps a) to d) as required whereby to form the object.

Method and computer-readable model for additively manufacturing an injector assembly or a ducting arrangement including such assembles, as may be used in a combustion system of a gas turbine engine. The injector assembly may include a reactant-guiding structure (42) that may be configured to define a curvilinear flow path (47) to route a flow of reactants from a first flow direction (50) to a second flow direction (52) toward a cross-flow of combustion gases (60). A cross-flow guiding structure (54) may further define a flow path (58) to route a portion of the cross-flow of combustion gases toward an outlet side of the cross-flow guiding structure. Disclosed injector assemblies can be configured to reduce pressure loss while providing an effective level of mixing of the injected reactants with the passing cross-flow. Respective injector assemblies or the entire ducting arrangement may be formed as a unitized structure, such as a single piece using a rapid manufacturing technology, such as 3D Printing/Additive Manufacturing (AM) technology.

Example systems may include an energy source, a material delivery device, and a computing device. The computing device, based on a target height of a layer deposited on a component by directed energy deposition, may control an energy source directed at a component and may control a material delivery device. Controlling the energy source may include advancing an energy beam along a first path to form an advancing molten pool on the component. Controlling the material delivery device may include delivering a material to the advancing molten pool. The material may combine with the advancing molten pool to form a first raised track having an actual height. The layer may include the first raised track. A deposited region of the component may include the layer. The actual height may affect a resultant microstructure within the deposited region.

A numerical control device includes: a program analyzing unit analyzing a transition of a moving velocity of a machining head and a transition of a supply amount of a material supplied to a beam-irradiation position based on a machining program; a movement distance calculating unit calculating a first distance based on a result of analysis performed by the program analyzing unit, the first distance being a length of a first movement section to a first position at which addition of the material to the workpiece is started, the first movement section being a section through which the machining head is moved while the head is accelerated; and a condition command generating unit generating a supply command to increase the supply amount of the material per hour from zero to a command value according to a machining condition while the machining head is moved through the first movement section.

An optical manufacturing process sensing and status indication system is taught that is able to utilize optical emissions from a manufacturing process to infer the state of the process. In one case, it is able to use these optical emissions to distinguish thermal phenomena on two timescales and to perform feature extraction and classification so that nominal process conditions may be uniquely distinguished from off-nominal process conditions at a given instant in time or over a sequential series of instants in time occurring over the duration of the manufacturing process. In other case, it is able to utilize these optical emissions to derive corresponding spectra and identify features within those spectra so that nominal process conditions may be uniquely distinguished from off-nominal process conditions at a given instant in time or over a sequential series of instants in time occurring over the duration of the manufacturing process.

An electron beam 3D printing machine, comprising a chamber for generating and accelerating an electron beam and an operating chamber in which a metal powder is melted, with the consequent production of a three-dimensional product. The chamber for generating and accelerating an electron beam houses means for generating an electron beam and means for accelerating the generated electron beam, while the operating chamber houses at least one platform for depositing the metal powder, metal powder handling means and electron beam deflection means. The accelerator means for the generated electron beam comprise a series of resonant cavities fed with an alternating signal.

Provided are a systems and methods for manufacturing objects by solid freeform fabrication, especially titanium and titanium alloy objects, wherein the deposition rate is increased by using two separate heat sources, one heat source for heating the deposition area on the base material and one heat source for heating and melting a metallic material, such as a metal wire or a powdered metallic material.

The present specification relates to an additive manufacturing apparatus comprising an X-ray reference object (18) for calibrating an electron beam unit in the additive manufacturing apparatus by detecting X-rays generated by sweeping an electron beam from the electron beam unit over a reference surface (19) of the X-ray reference object (18) and processing the detected signals, the X-ray reference object (18) comprising a support body (20) that has a top surface (21) and comprises a plurality of holes (22) in the top surface (21), The X-ray reference object (18) comprises a plurality of target members (23) inserted into the plurality of holes (22) of the support body (20). The present specification also relates to an X-ray detector to be used in the additive manufacturing apparatus, and to a method for calibrating such an additive manufacturing apparatus.