ADDITIVELY MANUFACURED PARTS AND RELATED METHODS

• US 20190331644A1
• Filed: 07/11/2019
• Published: 10/31/2019
• Est. Priority Date: 01/25/2017
• Status: Active Application

• Current Assignee: Howmet Aerospace, Inc.
• Original Assignee: Howmet Aerospace, Inc.
• Inventors: Bodily, Brandon H., Friant, Jared, Satoh, Gen, Schaper, Gary A.
• Application Number:
  US16/509,067
• Publication Number:
  US 20190331644A1
• Time in Patent Office: Days
• CPC Class Codes: B22F 10/28 Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• CPC Class Codes: B22F 10/38 to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures
• CPC Class Codes: B22F 10/64 by thermal means control of energy beam parameters for post heating B22F10/364
• CPC Class Codes: B22F 10/66 by mechanical means
• CPC Class Codes: B22F 12/45 Two or more
• CPC Class Codes: B22F 2003/175 by hot forging, below sintering temperature
• CPC Class Codes: B22F 2003/185 by hot rolling, below sintering temperature
• CPC Class Codes: B22F 2003/248 Thermal after-treatment
• CPC Class Codes: B22F 2998/10 Processes characterised by the sequence of their steps
• CPC Class Codes: B22F 2999/00 Aspects linked to processes or compositions used in powder metallurgy
• CPC Class Codes: B22F 3/17 by forging
• CPC Class Codes: B22F 3/18 by using pressure rollers
• CPC Class Codes: B22F 3/20 by extruding
• CPC Class Codes: B29C 64/153 using layers of powder being selectively joined, e.g. by selective laser sintering or melting
• CPC Class Codes: B29C 64/386 Data acquisition or data processing for additive manufacturing
• CPC Class Codes: B33Y 10/00 Processes of additive manufacturing
• CPC Class Codes: B33Y 40/20 Post-treatment, e.g. curing, coating or polishing
• CPC Class Codes: B33Y 50/00 Data acquisition or data processing for additive manufacturing
• CPC Class Codes: B33Y 70/00 Materials specially adapted for additive manufacturing
• CPC Class Codes: C22C 14/00 Alloys based on titanium
• CPC Class Codes: C22F 1/183 : of titanium or alloys based thereon
• CPC Class Codes: G01N 2291/015 : Attenuation, scattering
• CPC Class Codes: G01N 2291/0231 : Composite or layered materials
• CPC Class Codes: G01N 2291/0234 : Metals, e.g. steel
• CPC Class Codes: G01N 2291/0289 : Internal structure, e.g. defects, grain size, texture
• CPC Class Codes: G01N 29/043 : in the interior, e.g. by shear waves
• CPC Class Codes: G01N 29/11 : by measuring attenuation of acoustic waves
• CPC Class Codes: G01N 29/32 : Arrangements for suppressing undesired influences, e.g. temperature or pressure variations , compensating for signal noise
• CPC Class Codes: G01N 29/48 : by amplitude comparison
• CPC Class Codes: Y02P 10/25 : Process efficiency

Abstract

In some embodiments, an exemplary method directed toward non-destructive methods of inspecting additively manufactured parts includes: additively manufacturing a metal part, the metal part configured with an additive manufacturing grain structure indicative of the type of additive process utilized to construct the metal part, wherein the grain structure is configured with a first ultrasonic signal attenuation level when assessed via ultrasonic inspection; imparting an amount of strain on the metal part to transform the additive manufacturing grain structure having a first ultrasonic signal attenuation level to a grain structure having second ultrasonic signal attenuation level, wherein the second ultrasonic signal attenuation level is lower than the first ultrasonic signal attenuation level; and inspecting the metal part via a non-destructive testing evaluation method to confirm whether the metal part passes a part build specification.

Claims

1. A method, comprising:

additively manufacturing a metal part, the metal part configured with a first grain structure having a first amount of internal noise and a first amount of back wall signal attenuation when assessed via ultrasonic inspection;

imparting an amount of strain on the metal part to transform the first grain structure to a second grain structure having a second amount of internal noise and a second amount of back wall signal attenuation,

wherein the first amount of internal noise is greater than the second amount of internal noise;

further wherein the first amount of back wall signal attenuation is greater than the second amount of back wall signal attenuation; and

ultrasonically inspecting the metal part to obtain a result, wherein the imparting step configures the metal part with the second grain structure, which with the second amount of internal noise and second amount of back wall signal attenuation, is configured for ultrasonic evaluation.

2. The method of claim 1, wherein the first grain structure comprises an additive manufacturing grain structure indicative of the type of additive process utilized to construct the metal part.

3. The method of claim 1, wherein the first grain structure comprises columnar components.

4. The method of claim 1, wherein ultrasonically inspecting the metal part to obtain the result comprises confirming whether the metal part passes or fails a build specification for that part.

5. A method, comprising:

additively manufacturing a metal part, the metal part configured with an additive manufacturing grain structure indicative of the type of additive process utilized to construct the metal part, wherein the additive manufacturing grain structure is configured with a first ultrasonic signal attenuation level when assessed via ultrasonic inspection;

imparting an amount of strain on the metal part to transform the additive manufacturing grain structure having a first ultrasonic signal attenuation level to a grain structure having a second ultrasonic signal attenuation level, wherein the second ultrasonic signal attenuation level is lower than the first ultrasonic signal attenuation level; and

inspecting the metal part via a non-destructive testing evaluation method to confirm whether the metal part passes a part build specification.

6. The method of claim 5, wherein inspecting the metal part via the non-destructive testing evaluation comprises ultrasonically inspecting the metal part.

7. The method of claim 6, wherein ultrasonically inspecting the metal part comprises identifying ultrasonic signal attenuations in the metal part that are indicative of at least one flaw in the metal part or deviation from a build specification.

8. The method of claim 6, wherein the imparting step is configured to reduce an internal noise imparted on results of the ultrasonic inspection as compared to results from additive manufacturing grain structure.

9. A method, comprising:

additively manufacturing a metal part, the metal part configured with an additive manufacturing grain structure indicative of the type of additive manufacturing process utilized to construct the metal part, wherein the grain structure is configured with a high ultrasonic signal attenuation when assessed via ultrasonic inspection;

imparting a sufficient amount of strain on the metal part to transform the grain structure from an additively manufactured grain structure to a grain structure having reduced back wall signal attenuation in the metal part; and

evaluating the metal part via an ultrasonic inspection to assess whether the part meets specifications;

wherein the metal part is evaluable via the ultrasonic inspection via the imparting step.

10. The method of claim 9, wherein imparting comprises imparting a sufficient amount of strain to transform an ultrasonically amenable grain structure to the metal part.

11. The method of claim 9, wherein the imparting step comprises transforming the metal part to have a less ultrasonically attenuative configuration.

12. The method of claim 9, wherein upon ultrasonic evaluation, the metal part is configured with an ultrasonic signal amplitude of the back wall signal that is uniform per expectation based on part geometry.

13. The method of claim 9, wherein the imparting step is configured to transform a first grain structure into a second grain structure, wherein the second grain structure is less attenuative when evaluated via ultrasonic inspection.

14. The method of claim 9, wherein imparting strain is completed via one or more strokes of a working step.

15. The method of claim 9, wherein imparting strain comprises working the metal part by least one of:

forging, rolling, ring rolling, ring forging, shaped rolling, extruding, and combinations thereof.

16. The method of claim 15, wherein after working the part, the metal part is annealed.

17. The method of claim 9, wherein imparting strain comprises deforming the metal part to realize a true strain of at least 0.01 to not greater than 1.10 in the majority of the metal part, wherein the majority of the part is based on material volume.

18. The method of claim 9, wherein ultrasonically evaluating comprises at least one of phased array inspecting, laser UT inspecting, and combinations thereof.

19. The method of claim 9, wherein the specification is specific to at least one of the type of metal part, dimensions thereof, material(s) of construction, mechanical requirements, applications, and combinations thereof.

20. The method of claim 9, wherein the metal part is made from at least one of metals or alloys of titanium, aluminum, titanium-aluminide, nickel (e.g., INCONEL), steel, stainless steel, and combinations thereof.