High-resolution 3D strain and orientation mapping within a grain of a directed energy deposition laser additively manufactured superalloy
<p>The industrialization of Laser Additive Manufacturing (LAM) is challenged by the undesirable microstructures and high residual stresses originating from the fast and complex solidification process. Non-destructive assessment of the mechanical performance controlling deformation patterning i...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Elsevier
2023
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| _version_ | 1826313106982174720 |
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| author | Chen, Y Tang, YT Collins, DM Clark, SJ Ludwig, W Rodriguez-Lamas, R Detlefs, C Reed, RC Lee, PD Withers, PJ Yildirim, C |
| author_facet | Chen, Y Tang, YT Collins, DM Clark, SJ Ludwig, W Rodriguez-Lamas, R Detlefs, C Reed, RC Lee, PD Withers, PJ Yildirim, C |
| author_sort | Chen, Y |
| collection | OXFORD |
| description | <p>The industrialization of Laser Additive Manufacturing (LAM) is challenged by the undesirable microstructures and high residual stresses originating from the fast and complex solidification process. Non-destructive assessment of the mechanical performance controlling deformation patterning is therefore critical. Here, we use Dark Field X-ray Microscopy (DFXM) to map the 3D subsurface intragranular orientation and strain variations throughout a surface-breaking grain within a directed energy deposition nickel superalloy. DFXM results reveal a highly heterogenous 3D microstructure in terms of the local orientation and lattice strain. The grain comprises ≈ 5 µm-sized cells with alternating strain states, as high as 5 ×10−3 , and orientation differences <0.5°. The DFXM results are compared to Electron Backscatter Diffraction measurements of the same grain from its cut-off surface. We discuss the microstructure developments during LAM, rationalising the development of the deformation patterning from the extreme thermal gradients during processing and the susceptibility for solute segregation.</p> |
| first_indexed | 2024-03-07T07:47:25Z |
| format | Journal article |
| id | oxford-uuid:bcd919fd-5823-4873-86ce-15ac8436a40f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-09-25T04:07:50Z |
| publishDate | 2023 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:bcd919fd-5823-4873-86ce-15ac8436a40f2024-05-31T09:47:29ZHigh-resolution 3D strain and orientation mapping within a grain of a directed energy deposition laser additively manufactured superalloyJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:bcd919fd-5823-4873-86ce-15ac8436a40fEnglishSymplectic ElementsElsevier2023Chen, YTang, YTCollins, DMClark, SJLudwig, WRodriguez-Lamas, RDetlefs, CReed, RCLee, PDWithers, PJYildirim, C<p>The industrialization of Laser Additive Manufacturing (LAM) is challenged by the undesirable microstructures and high residual stresses originating from the fast and complex solidification process. Non-destructive assessment of the mechanical performance controlling deformation patterning is therefore critical. Here, we use Dark Field X-ray Microscopy (DFXM) to map the 3D subsurface intragranular orientation and strain variations throughout a surface-breaking grain within a directed energy deposition nickel superalloy. DFXM results reveal a highly heterogenous 3D microstructure in terms of the local orientation and lattice strain. The grain comprises ≈ 5 µm-sized cells with alternating strain states, as high as 5 ×10−3 , and orientation differences <0.5°. The DFXM results are compared to Electron Backscatter Diffraction measurements of the same grain from its cut-off surface. We discuss the microstructure developments during LAM, rationalising the development of the deformation patterning from the extreme thermal gradients during processing and the susceptibility for solute segregation.</p> |
| spellingShingle | Chen, Y Tang, YT Collins, DM Clark, SJ Ludwig, W Rodriguez-Lamas, R Detlefs, C Reed, RC Lee, PD Withers, PJ Yildirim, C High-resolution 3D strain and orientation mapping within a grain of a directed energy deposition laser additively manufactured superalloy |
| title | High-resolution 3D strain and orientation mapping within a grain of a directed energy deposition laser additively manufactured superalloy |
| title_full | High-resolution 3D strain and orientation mapping within a grain of a directed energy deposition laser additively manufactured superalloy |
| title_fullStr | High-resolution 3D strain and orientation mapping within a grain of a directed energy deposition laser additively manufactured superalloy |
| title_full_unstemmed | High-resolution 3D strain and orientation mapping within a grain of a directed energy deposition laser additively manufactured superalloy |
| title_short | High-resolution 3D strain and orientation mapping within a grain of a directed energy deposition laser additively manufactured superalloy |
| title_sort | high resolution 3d strain and orientation mapping within a grain of a directed energy deposition laser additively manufactured superalloy |
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