Method for manufacturing layered structure

A manufacturing method for a layered structure including at least one first melt-solidified layer and at least one second melt-solidified layer, and including crystallographic texture in which the at least one first melt-solidified layer and the at least one second melt-solidified layer are layered in a thickness direction, including the steps of:

• providing a gas flow parallel to the surface of a powder bed on which raw material powder is deposited;
• forming the first melt-solidified layer by scanning and irradiating an energy beam in a first direction which is parallel to the surface of the powder bed;
• and
• forming the second melt-solidified layer by scanning and irradiating an energy beam in a second direction which is parallel to the surface of the powder bed and intersects the first direction;
• wherein a residual thickness of the first melt-solidified layer and a residual thickness of the second melt-solidified layer in the crystallographic texture are controlled by the steps of:
• when forming the first melt-solidified layer, adjusting a first accumulation thickness of the powder bed and a first heat input amount of the energy beam irradiated to the powder bed to control a layer thickness of the first melt-solidified layer and a penetration depth of the first melt-solidified layer;
• and
• when forming the second melt-solidified layer, adjusting a second accumulation thickness of the powder bed and a second heat input amount of the energy beam irradiated to the powder bed to control a layer thickness of the second melt-solidified layer and a penetration depth of the second melt-solidified layer;
• and
• wherein the first heat input amount is controlled by adjusting an angle α1 between the first direction and a direction of the gas flow, and the second heat input amount is controlled by adjusting an angle α2 between the second direction and the direction of the gas flow.