Cyclic Crack Growth in Chemically Tailored Isotropic Austenitic Steel Processed by Electron Beam Powder Bed Fusion
The present study analyzes the cyclic crack propagation behavior in an austenitic steel processed by electron beam powder bed fusion (PBF-EB). The threshold value of crack growth as well as the crack growth behavior in the Paris regime were studied. In contrast to other austenitic steels, the buildi...
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MDPI AG
2021-11-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/21/6544 |
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| author | Matthias Droste Ruben Wagner Johannes Günther Christina Burkhardt Sebastian Henkel Thomas Niendorf Horst Biermann |
| author_facet | Matthias Droste Ruben Wagner Johannes Günther Christina Burkhardt Sebastian Henkel Thomas Niendorf Horst Biermann |
| author_sort | Matthias Droste |
| collection | DOAJ |
| description | The present study analyzes the cyclic crack propagation behavior in an austenitic steel processed by electron beam powder bed fusion (PBF-EB). The threshold value of crack growth as well as the crack growth behavior in the Paris regime were studied. In contrast to other austenitic steels, the building direction during PBF-EB did not affect the crack propagation rate, i.e., the crack growth rates perpendicular and parallel to the building direction were similar due to the isotropic microstructure characterized by equiaxed grains. Furthermore, the influence of significantly different building parameters was studied and, thereby, different energy inputs causing locally varying manganese content. Crack growth behavior was not affected by these changes. Even a compositional gradation within the same specimen, i.e., crack growth through an interface of areas with high and areas with low manganese content, did not lead to a significant change of the crack growth rate. Thus, the steel studied is characterized by a quite robust cyclic crack growth behavior independent from building direction and hardly affected by typical parameter deviations in the PBF-EB process. |
| first_indexed | 2024-03-10T05:58:13Z |
| format | Article |
| id | doaj.art-dc332aee9f284d8bb5df7bb3b57af44b |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T05:58:13Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-dc332aee9f284d8bb5df7bb3b57af44b2023-11-22T21:13:46ZengMDPI AGMaterials1996-19442021-11-011421654410.3390/ma14216544Cyclic Crack Growth in Chemically Tailored Isotropic Austenitic Steel Processed by Electron Beam Powder Bed FusionMatthias Droste0Ruben Wagner1Johannes Günther2Christina Burkhardt3Sebastian Henkel4Thomas Niendorf5Horst Biermann6Institute of Materials Engineering, Technische Universität Bergakademie Freiberg, Gustav-Zeuner-Straße 5, 09599 Freiberg, GermanyInstitute of Materials Engineering, Technische Universität Bergakademie Freiberg, Gustav-Zeuner-Straße 5, 09599 Freiberg, GermanyInstitute of Materials Engineering, Universität Kassel, Mönchebergstraße 3, 34125 Kassel, GermanyInstitute of Materials Engineering, Technische Universität Bergakademie Freiberg, Gustav-Zeuner-Straße 5, 09599 Freiberg, GermanyInstitute of Materials Engineering, Technische Universität Bergakademie Freiberg, Gustav-Zeuner-Straße 5, 09599 Freiberg, GermanyInstitute of Materials Engineering, Universität Kassel, Mönchebergstraße 3, 34125 Kassel, GermanyInstitute of Materials Engineering, Technische Universität Bergakademie Freiberg, Gustav-Zeuner-Straße 5, 09599 Freiberg, GermanyThe present study analyzes the cyclic crack propagation behavior in an austenitic steel processed by electron beam powder bed fusion (PBF-EB). The threshold value of crack growth as well as the crack growth behavior in the Paris regime were studied. In contrast to other austenitic steels, the building direction during PBF-EB did not affect the crack propagation rate, i.e., the crack growth rates perpendicular and parallel to the building direction were similar due to the isotropic microstructure characterized by equiaxed grains. Furthermore, the influence of significantly different building parameters was studied and, thereby, different energy inputs causing locally varying manganese content. Crack growth behavior was not affected by these changes. Even a compositional gradation within the same specimen, i.e., crack growth through an interface of areas with high and areas with low manganese content, did not lead to a significant change of the crack growth rate. Thus, the steel studied is characterized by a quite robust cyclic crack growth behavior independent from building direction and hardly affected by typical parameter deviations in the PBF-EB process.https://www.mdpi.com/1996-1944/14/21/6544additive manufacturingthreshold valueTRIPisotropic microstructure |
| spellingShingle | Matthias Droste Ruben Wagner Johannes Günther Christina Burkhardt Sebastian Henkel Thomas Niendorf Horst Biermann Cyclic Crack Growth in Chemically Tailored Isotropic Austenitic Steel Processed by Electron Beam Powder Bed Fusion Materials additive manufacturing threshold value TRIP isotropic microstructure |
| title | Cyclic Crack Growth in Chemically Tailored Isotropic Austenitic Steel Processed by Electron Beam Powder Bed Fusion |
| title_full | Cyclic Crack Growth in Chemically Tailored Isotropic Austenitic Steel Processed by Electron Beam Powder Bed Fusion |
| title_fullStr | Cyclic Crack Growth in Chemically Tailored Isotropic Austenitic Steel Processed by Electron Beam Powder Bed Fusion |
| title_full_unstemmed | Cyclic Crack Growth in Chemically Tailored Isotropic Austenitic Steel Processed by Electron Beam Powder Bed Fusion |
| title_short | Cyclic Crack Growth in Chemically Tailored Isotropic Austenitic Steel Processed by Electron Beam Powder Bed Fusion |
| title_sort | cyclic crack growth in chemically tailored isotropic austenitic steel processed by electron beam powder bed fusion |
| topic | additive manufacturing threshold value TRIP isotropic microstructure |
| url | https://www.mdpi.com/1996-1944/14/21/6544 |
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