WO2020043906A1 - Instrument de développement d'alliage pour fabrication additive (am) - Google Patents

Instrument de développement d'alliage pour fabrication additive (am) Download PDF

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Publication number
WO2020043906A1
WO2020043906A1 PCT/EP2019/073266 EP2019073266W WO2020043906A1 WO 2020043906 A1 WO2020043906 A1 WO 2020043906A1 EP 2019073266 W EP2019073266 W EP 2019073266W WO 2020043906 A1 WO2020043906 A1 WO 2020043906A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity plate
cavities
plate according
cavity
powder
Prior art date
Application number
PCT/EP2019/073266
Other languages
English (en)
Inventor
Michael Albert ACKERS
Original Assignee
Oerlikon Am Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oerlikon Am Gmbh filed Critical Oerlikon Am Gmbh
Publication of WO2020043906A1 publication Critical patent/WO2020043906A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/32—Process control of the atmosphere, e.g. composition or pressure in a building chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/34—Process control of powder characteristics, e.g. density, oxidation or flowability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/36—Process control of energy beam parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y99/00—Subject matter not provided for in other groups of this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/90—Means for process control, e.g. cameras or sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/02—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a plurality of sample containers moved by a conveyor system past one or more treatment or analysis stations
    • G01N35/04—Details of the conveyor system
    • G01N2035/0439—Rotary sample carriers, i.e. carousels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • NADFAM Novel Alloy Development for AM
  • NADFAM is a versatile instrument which can replicate the conditions experienced in the metal printer; most critically the cyclic rapid solidification.
  • NADFAM comprises several shallow cavities distributed on a custom-made baseplate allowing fast screening of multiple compositions.
  • the alloys can be produced for example by using elemental powder blends of the designed mixtures.
  • This system can be further equipped with measuring devices to obtain additional information of the alloy processability (e.g. packing density, thermal conductivity, high-speed camera).
  • the NADFAM instrument is covered with a laser transparent glass it can also enable assessment of a) alloy processability in vacuum conditions, b) the usage of various gas mixtures and their influence on weldability and microstructure.
  • a heating system can replicate different AM processes, with heated baseplates/ elevated temperatures.
  • the present invention relates to a platform (NADFAM Instrument) for qualifying machine specific additive manufacturing (AM) powders and AM alloys.
  • AM additive manufacturing
  • Each type of AM machine has different laser systems, focusing modes and other parameters which cause a machine/alloy-specific melting and solidification rate of the powder alloys. It is therefore difficult to develop new alloys for additive manufacturing as such development involves extensive and expensive experiments with a series of powders. Multiple test rows are necessary in order to optimize machine specific powder alloys and machine specific powder mixtures (blends), with a custom made powder size distribution and alloy specific built job parameters. And even if an optimized powder size distribution/ powder alloy for one AM machine of one type is found that this is not necessarily an optimum powder for an AM machine of another type
  • Arrangement of cavities in a two dimensional matrix in this context means that several cavities are arranged on the surface of a base body in such a way that a plane exists where when the surface is projected onto that plane the projections of the cavities essentially do not overlap.
  • the easiest realization of a two dimensional matrix in this sense is the arrangement of the cavities on a plane surface. This might be just a row or it might be columns and rows. It might as well be a circular arrangement or some other two dimensional arrangement.
  • the matrix arrangement of the cavity makes it possible to load each cavity with a slightly different powder composition or powder size distribution. During one single laser run covering the cavities many different powder compositions may be tested.
  • cavities can be loaded with identical powders and from cavity to cavity the exposure parameters of the AM laser can be varied in order to find the optimum exposure parameters.
  • the geometry of the cavities of the plate may vary from cavity to cavity, such as for example size and of shape. Size will have influence on the cooling down velocity whereas different shapes might end up in different final shapes of the body created by the powder within the specifically shaped cavity.
  • the cavity surfaces (walls and bottom) might be structured or coated for example to increase the surface tension is such a way that almost a spherical shape is formed when the powder is molten. Thus, in order to provide for an effect facilitating separation, such as for example a lotus effect. By this the influence of these surfaces on the shape forming of the melted powder particles might be minimized.
  • the cavity plate is to be used multiple times, cleaning the plate after use will be by far easier.
  • the inventive cavity plate might be covered with a transparent cover, such as a glass cover thereby closing the cavities and separating them from the surrounding atmosphere.
  • a transparent cover such as a glass cover
  • the transparent cover has antireflection measures on at least one, however most preferably on both sides of its surface.
  • antireflection measures could for example be antireflection coatings and/or antireflection subwavelength structures.
  • the transparent plate (if given) can be removed and the cavities can be filled with a resin being a curing material, preferably with a cold curing material. Flipping the thereby created assembly upside down and removing the cavity plate will then result in a two dimensional matrix of probes which allow for for example simultaneous metallurgical preparation (grinding, polishing, etching, etc.).
  • the cavity plate 101 comprises a solid cylinder 103, a glass cover 105 and a cover steel (or other materials) plate 107.
  • a vertical cut of the assembly is schematically shown in figure 1.
  • FIG. 2a A perspective view of the solid cylinder 203 according to this embodiment is shown in figure 2a.
  • the solid cylinder 203 comprises a bottom plane (not seen in figure 2a) a cylindrical surface 205 and a top plane 207.
  • a top plane 207 In the top plane 207 there are multiple indentations 209, 209’, 209” which form cavities. Accordingly some of the cavities 109, 109’ can as well be seen in the cut of figure 1.
  • the top plane comprises as well a circular groove 211 with a sealing 213 placed and partially buried into it. In its height the sealing extends beyond the top plane.
  • the sealing 213 then seals the cavities 209, 209’ 209” from the environment.
  • the solid cylinder comprises as well a centered through bore 215 which extends from the bottom plane to the top plane of the solid cylinder.
  • the through bore 215 can be used as feed through in order to either evacuate the cavities 109, 109’, 109” or to fill them with gas in a controlled manner.
  • FIG. 2b Another perspective view of the solid cylinder 203 according to this embodiment is shown in figure 2b, this time showing the bottom plane and how the centered through bore 215 extends to it.
  • Figure 2b shows schematically two additional bores 217, 217’. These bores end in the vicinity of a cavity and they allow to introduce specific sensors such as for example temperature sensors etc. It is even possible to incorporate many small levitation induction coils in NADFAM below the cavities to allow to melt small amounts of powder, and then use an IR sensor to measure the thermal conductivity of the respective alloy according to the laser flash method.
  • a glass cover 105, 305 is placed onto the top plane of the solid cylinder.
  • Figure 3 shows the perspective view of such a glass cover.
  • the glass cover comprises an upper plate 307 and a lower plate 309.
  • the upper plate 307 is just a glass disc with a diameter corresponding to the diameter of the solid cylinder.
  • the lower plate 309 has the same shape as the upper plate 307 and is fixed to the upper plate.
  • the lower plate 309 is structured in such a way that when the glass cover is put onto the solid cylinder the structures of the lower plate provide for connections of the cavities and the through bore which can be used to either evacuate the cavities or to introduce gas in a controlled manner.
  • Another possibility would be to connect the cavities and the through bore via grooves in the top plane of the solid cylinder. Structuring the lower part of the glass cover however provides for more flexibility as the glass cover - maybe with a different structuring - can be easily changed.
  • cover steel plate 107, 407 onto the glass cover.
  • This cover steel plate 407 is shown in perspective view in figure 4.
  • the cover steel plate 407 is structured in such a way that it provides for holes corresponding to the cavities 109, 109’, 109”.
  • Figure 5 shows a distribution according to the first letters of the applicant ' s company name.
  • NADFAM can be used as a blend homogeneity assessment tool.
  • Figure 6 schematically shows the steps a described above.

Abstract

L'invention concerne une plaque de cavité destinée à charger un matériau pulvérulent de fabrication additive, la plaque de cavité (101) comprenant un corps de base solide (103, 203), le corps de base solide (103, 203) comprenant une surface, de préférence un plan supérieur (207), au moins deux, de préférence au moins trois, de préférence plusieurs indentations qui forment des cavités (109, 109', 109'', 209, 209', 209'') dans la plaque de cavité (101) étant disposées dans la surface pour charger le matériau pulvérulent de fabrication additive.
PCT/EP2019/073266 2018-08-31 2019-08-30 Instrument de développement d'alliage pour fabrication additive (am) WO2020043906A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862725538P 2018-08-31 2018-08-31
US62/725,538 2018-08-31

Publications (1)

Publication Number Publication Date
WO2020043906A1 true WO2020043906A1 (fr) 2020-03-05

Family

ID=67847710

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/073266 WO2020043906A1 (fr) 2018-08-31 2019-08-30 Instrument de développement d'alliage pour fabrication additive (am)

Country Status (1)

Country Link
WO (1) WO2020043906A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6004617A (en) * 1994-10-18 1999-12-21 The Regents Of The University Of California Combinatorial synthesis of novel materials
US20040062911A1 (en) * 2002-09-27 2004-04-01 Lauf Robert J. Combinatorial synthesis of ceramic materials
US20140234891A1 (en) * 2011-04-19 2014-08-21 Porex Corporation Cards for Sample Storage and Delivery Comprising Sintered Porous Plastic
US20170028376A9 (en) * 1998-01-12 2017-02-02 Massachusetts Institute Of Technology Systems for Filling a Sample Array by Droplet Dragging

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6004617A (en) * 1994-10-18 1999-12-21 The Regents Of The University Of California Combinatorial synthesis of novel materials
US20170028376A9 (en) * 1998-01-12 2017-02-02 Massachusetts Institute Of Technology Systems for Filling a Sample Array by Droplet Dragging
US20040062911A1 (en) * 2002-09-27 2004-04-01 Lauf Robert J. Combinatorial synthesis of ceramic materials
US20140234891A1 (en) * 2011-04-19 2014-08-21 Porex Corporation Cards for Sample Storage and Delivery Comprising Sintered Porous Plastic

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