Method and device for implementing laser shock peening or warm laser shock peening during selective laser melting
AssigneeEcole Polytechnique Federale De Lausanne (Epfl)
InventorsNikola Kalentics, Roland Logé, Eric Boillat
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Abstract
A method for manufacturing an object including the steps of forming layers by adding successive layers of material to form the object by selective laser melting (SLM), and inducing plastic deformation and residual stress into solidified material of at least one of the successive layers of material to improve mechanical properties and a fatigue resistance of the object, wherein the plastic deformation and the residual stress are induced by a laser.
Claims18
A method for manufacturing an object comprising the steps of:
- forming layers by adding successive layers of powder material to form the object by selective laser melting (SLM) of the powder material to form solidified material;
- providing a multilayered solid state confining layer to the solidified material;
- and
- inducing plastic deformation and residual stress by a laser beam into the solidified material of the successive layers after the step of providing, to improve mechanical properties and a fatigue resistance of the object.
A system to carry out a selective laser melting (SLM) process, the system comprising:
- a first laser;
- a scanning head;
- a powder deposition system including fresh powder;
- a platform on which a part is built by the SLM process realized by the first laser;
- a second laser;
- a solid state confining layer transparent to laser, the solid state confining layer including two layers;
- and
- an ablative layer for applying a laser shock peening (LSP) step to the part.
Dependencies are inferred from the claim text.