Illkirch-Graffenstaden, France
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Patent
Irepa Laser and Associacion De Investigacion Metalurgica Del Noroeste | Date: 2015-06-15

The present invention relates to a method of manufacturing a direct and selective surface deposition by a pulsed radiation treatment. Said method allows the production of a selective pattern on any receiving material without any pre-treatment and/or post-treatment of said receiving material. The invention provides a selective deposition of a monolayer donor material onto a receiving material by means of a pulsed radiation treatment without any contact between said donor and receiving materials. It further provides a method of direct surface metallization of various types of receiving materials using a pulsed radiation treatment. The present invention provides a method of manufacturing a direct and selective surface deposition by a pulsed radiation treatment of a monolayer donor material onto a receiving material. The present invention relates more particularly to a method of manufacturing free form patterned deposition on surfaces of various receiving materials.


News Article | May 23, 2017
Site: www.prweb.com

The Laser Institute of America (LIA) will organize for the first time a 1.5 hour Additive Manufacturing (AM) session called AM: Trends in North America as part of the World of Photonics Congress LiM 2017 event. Held on Wednesday, June 28, 2017, from 2:00-3:30 PM local time at the International Congress Center in Munich, Germany, the event runs as a session of a subconference of the larger LiM event from June 26-29, 2017. LiM is a scientific conference on the latest advances and future trends in the field of laser materials processing, with a focus on potential for industrial applications. Organized by the German Scientific Laser Society (WLT), LiM 2017 is the premier international forum for researchers and experts in laser manufacturing. The unprecedented AM session offered by LIA is intended to provide updates on the most current laser additive manufacturing applications and offer a helpful perspective regarding how American and Canadian companies are successfully using AM technology to reduce cost and increase efficiency. “Now is an important time to be a part of all that is developing in the AM world in North America,” said Jim Naugle, LIA’s Marketing Director. “We are pleased to add our knowledge and insight to the vast body of additive manufacturing expertise offered at LiM 2017 through the AM: Trends in North America session." Attendees will include engineers, manufacturing managers, system integrators, precision parts specialists, and OEMs from all over the world in fields such as business development, manufacturing, construction, and design. Featured Keynote David Ott from the Global Humanitarian Lab (GHL) will explain how 3D Printing can bring together the humanitarian world (private, academic and scientific) to address common challenges in disaster affected communities. Other invited speakers include Rob Martinsen, CTO of nLight, and William Herbert, Director of Corporate Development for Carpenter Technologies. Martinsen will speak of breakthrough solutions for additive manufacturing and Herbert will cover material requirements. The session will come to a conclusion with presenter Yannick Lafue, Business Developer for Aeronautics, Defense and Oil & Gas at IREPA LASER with his presentation on AM with LMD-CLAD process: an Industrial opportunity. For more information on this event, including sponsorship information, please contact marketing(at)lia.org or +1-407-380-1553. To learn more about LiM 2017, visit the LiM 2017 website.


Patent
Irepa Laser and Asociacion De Investigacion Metalurgica Del Noroeste Aimen | Date: 2017-04-19

The present invention relates to a method of manufacturing a direct and selective surface deposition by a pulsed radiation treatment. Said method allows the production of a selective pattern on any receiving material without any pre-treatment and/or post-treatment of said receiving material. The invention provides a selective deposition of a monolayer donor material onto a receiving material by means of a pulsed radiation treatment without any contact between said donor and receiving materials. It further provides a method of direct surface metallization of various types of receiving materials using a pulsed radiation treatment. The present invention provides a method of manufacturing a direct and selective surface deposition by a pulsed radiation treatment of a monolayer donor material onto a receiving material. The present invention relates more particularly to a method of manufacturing free form patterned deposition on surfaces of various receiving materials.


Boisselier D.,IREPA LASER | Sankare S.,IREPA LASER | Engel T.,ICube
Physics Procedia | Year: 2014

The implementation of the continuous 5-axis configuration can extend the limits of the Laser Direct Metal Deposition (LDMD) processes, especially when the complexity of the parts to be built is growing. In order to follow the profile of a part, we use the orientation of its growth axis. Although 5-axis machining is well known nowadays, LDMD processes require a specific optimization that depends on many parameters. Unlike conventional machining, it has to be noted that the speed variation tool tip affects the stability of deposition. Thus, we have to smooth trajectories in order to provide fluid movements and also to ensure the stability of deposition. This article describes the method and results in the optimization of trajectories to build metallic parts with freeform. Optical sensors have been implemented in the focusing unit in order to follow the variations of the laser-powder-substrate interaction and also to detect the process instabilities. Thanks to the right use of a new and large 5 axis machine and specific setting trajectories, manufacturing parts in 5-axis, with no concession on the construction rate has been possible. © 2014 The Authors. Published by Elsevier B.V.


De Lima M.S.F.,Institute for Advanced Studies | Sankare S.,IREPA LASER
Materials and Design | Year: 2014

Laser additive manufacturing of stainless steels is a promising process for near net shape fabrication of parts requiring good mechanical and corrosion properties with a minimal waste generation. This work focuses on high aspect ratio AISI 316 steel structures made by superposition of sequential layers. A special nozzle for precise powder delivery together with a monomode fiber laser allowed producing high quality steel stringers on AISI 316 steel substrates. Although the stringers average compositions were inside the austenite plus ferrite range, only austenite phase was verified. The cladded structure presented some internal pores and cracks, responsible by the low Young's moduli. However, the tensile properties were similar to the base material and other literature results. The three-point flexural tests also produced good results in terms of formability. The fabricated structures proved to be useful for use in mechanical construction. © 2013 Elsevier Ltd.


Serres N.,LGeCo LISS | Hlawka F.,LGeCo LISS | Costil S.,University of Technology of Belfort - Montbéliard | Langlade C.,University of Technology of Belfort - Montbéliard | MacHi F.,IREPA LASER
Journal of Thermal Spray Technology | Year: 2011

This paper deals with coating alternatives to hard chromium plating. Thermal spraying is already used in industry, but results are not always satisfactory for reasons of porosity and microstructures. In this study, atmospheric plasma spraying (APS) and in situ laser irradiation by diode laser processes were combined to modify the structural characteristics of thick NiCrBSi alloy layers. The microstructure evolution was studied, and results show that in situ laser remelting induced the growth of a dendritic structure, which strongly decreased the porosity of as-sprayed coatings and increased the adhesion on the substrate. Moreover, no phase transition after laser treatment was observed. Lastly, a mechanical investigation demonstrated that the combination between plasma spray and in situ melting with a diode laser could result in very good mechanical properties. The increase of the laser incident power involved an increase of the mean contact pressure, along with coating hardness. The hybrid process appears to be a possible alternative to hard chromium plating, in order to protect mechanical parts, because of the improved mechanical properties of the NiCrBSi layer. © 2010 ASM International.


Serres N.,LGECO LISS | Hlawka F.,LGECO LISS | Costil S.,University of Technology of Belfort - Montbéliard | Langlade C.,University of Technology of Belfort - Montbéliard | Machi F.,IREPA LASER
Wear | Year: 2011

Electrolytic hard chromium has proved to be effective against wear. However, its use is about to decrease due to the toxic and carcinogenic characteristics of hexavalent chromium. A lot of promising alternatives have been already studied. Among them, thermal spraying presents a good potential. In this study, laser remelting was combined simultaneously to thermal spraying in order to modify a metal alloy coating characteristics. The mechanical properties of a nickel-base layer were investigated by nanoindentation, scratch tests, interfacial indentation and tribological ball-on-disc experiments. The influence of the coating structures on the wear behaviour of in situ remelted NiCrBSi coatings was investigated. This paper demonstrates that the remelted samples have better mechanical performances than as-sprayed coatings. Moreover, the adhesion of remelted samples was strongly increased, as well as the fracture toughness. According to the selected processing parameters, the increase of the laser energy density seems to show better mechanical results. © 2011 Elsevier B.V.


Patent
Irepa Laser and Asociacion De Investigacion Metalurgica Del Noroeste Aimen | Date: 2015-12-16

The present invention relates to a method of manufacturing a direct and selective surface deposition by a pulsed radiation treatment. Said method allows the production of a selective pattern on any receiving material without any pre-treatment and/or post-treatment of said receiving material. The invention provides a selective deposition of a donor material onto a receiving material by means of a pulsed radiation treatment without any contact between said donor and receiving materials. It further provides a method of direct surface metallization of various types of receiving materials using a pulsed radiation treatment. The present invention provides a method of manufacturing a direct and selective surface deposition by a pulsed radiation treatment of a donor material onto a receiving material. The present invention relates more particularly to a method of manufacturing free form patterned deposition on surfaces of various receiving materials.


Serres N.,LGeCo LISS | Portha N.,IREPA LASER | Machi F.,IREPA LASER
Surface and Coatings Technology | Year: 2011

NiCrBSi materials are widely used in applications where corrosion and wear resistance are required. This Ni-based alloy has been deposited onto C38 steel disc using the laser cladding technique. This paper describes the results of experiments that were performed using pin-on-disc tribometer and Knoop indentation on aging tests, for different exposure times, in a salt spray booth. Salt spray corrosion tests have shown that over 800h of exposure, samples exhibit very high corrosion resistance. Mechanical properties, as well as wear behaviour are not affected under these conditions, due to the formation of Cr2O3 on the surface. However, for longer exposure (aging) time, wear behaviour was affected because of a pit distribution as well as chlorine presence on the surface. Thus, the mechanical properties deteriorated. © 2011 Elsevier B.V.


Patent
Irepa Laser | Date: 2013-01-11

The present disclosure relates to a shaping device for light rays of a laser beam that cross it, wherein the shaping device is formed by a conduit including an entry orifice, an exit orifice, and an internal wall, achieved by one or a plurality of facets adapted to reorient by at least one reflection at least a part of the rays of the crossing beam.

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