In-situ interstitial alloying during laser powder bed fusion of AISI 316 for superior corrosion resistance
The present work explores for the first time additive manufacturing of powder mixtures consisting of Chromium Nitride (Cr2N) and AISI 316L with laser powder bed fusion (L-PBF). The addition of 2.5 wt% Cr2N to an AISI 316L powder resulted in the successful dissolution of both chromium and nitrogen in...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-12-01
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| Series: | Additive Manufacturing Letters |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772369021000062 |
| _version_ | 1819177688980520960 |
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| author | Emilie Hørdum Valente Venkata Karthik Nadimpalli Thomas L. Christiansen David Bue Pedersen Marcel A.J. Somers |
| author_facet | Emilie Hørdum Valente Venkata Karthik Nadimpalli Thomas L. Christiansen David Bue Pedersen Marcel A.J. Somers |
| author_sort | Emilie Hørdum Valente |
| collection | DOAJ |
| description | The present work explores for the first time additive manufacturing of powder mixtures consisting of Chromium Nitride (Cr2N) and AISI 316L with laser powder bed fusion (L-PBF). The addition of 2.5 wt% Cr2N to an AISI 316L powder resulted in the successful dissolution of both chromium and nitrogen into a fully austenitic stainless steel microstructure. The nitrogen content was augmented from 0.09 wt% in the as-delivered AISI 316L powder to 0.31 wt% in the L-PBF built part, causing a slight expansion of the austenite lattice. Elongated austenite grains with an internal cellular substructure were obtained in both the Cr2N modified 316L and the 316L specimens manufactured by L-PBF. The addition of nitrogen (and chromium) from Cr2N resulted in a Vickers hardness increase of about 40 HV0.1, mainly by interstitial solid solution strengthening. The modification of 316L by the addition of Cr2N significantly improved the corrosion resistance. The improved hardness and corrosion resistance while retaining the manufacturability and cellular microstructure illustrate the potential for modifying the composition and properties of L-PBF 316L with targeted dosing with Cr2N powders. |
| first_indexed | 2024-12-22T21:30:38Z |
| format | Article |
| id | doaj.art-7ea0d6c69f014ec78ac96d424d6ed598 |
| institution | Directory Open Access Journal |
| issn | 2772-3690 |
| language | English |
| last_indexed | 2024-12-22T21:30:38Z |
| publishDate | 2021-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Additive Manufacturing Letters |
| spelling | doaj.art-7ea0d6c69f014ec78ac96d424d6ed5982022-12-21T18:11:55ZengElsevierAdditive Manufacturing Letters2772-36902021-12-011100006In-situ interstitial alloying during laser powder bed fusion of AISI 316 for superior corrosion resistanceEmilie Hørdum Valente0Venkata Karthik Nadimpalli1Thomas L. Christiansen2David Bue Pedersen3Marcel A.J. Somers4Corresponding author.; Technical University of Denmark, Department of Mechanical Engineering, 2800 Kgs. Lyngby, DenmarkTechnical University of Denmark, Department of Mechanical Engineering, 2800 Kgs. Lyngby, DenmarkTechnical University of Denmark, Department of Mechanical Engineering, 2800 Kgs. Lyngby, DenmarkTechnical University of Denmark, Department of Mechanical Engineering, 2800 Kgs. Lyngby, DenmarkTechnical University of Denmark, Department of Mechanical Engineering, 2800 Kgs. Lyngby, DenmarkThe present work explores for the first time additive manufacturing of powder mixtures consisting of Chromium Nitride (Cr2N) and AISI 316L with laser powder bed fusion (L-PBF). The addition of 2.5 wt% Cr2N to an AISI 316L powder resulted in the successful dissolution of both chromium and nitrogen into a fully austenitic stainless steel microstructure. The nitrogen content was augmented from 0.09 wt% in the as-delivered AISI 316L powder to 0.31 wt% in the L-PBF built part, causing a slight expansion of the austenite lattice. Elongated austenite grains with an internal cellular substructure were obtained in both the Cr2N modified 316L and the 316L specimens manufactured by L-PBF. The addition of nitrogen (and chromium) from Cr2N resulted in a Vickers hardness increase of about 40 HV0.1, mainly by interstitial solid solution strengthening. The modification of 316L by the addition of Cr2N significantly improved the corrosion resistance. The improved hardness and corrosion resistance while retaining the manufacturability and cellular microstructure illustrate the potential for modifying the composition and properties of L-PBF 316L with targeted dosing with Cr2N powders.http://www.sciencedirect.com/science/article/pii/S2772369021000062Austenitic stainless steel316LChromium nitrideL-PBFCorrosion resistanceAdditive manufacturing |
| spellingShingle | Emilie Hørdum Valente Venkata Karthik Nadimpalli Thomas L. Christiansen David Bue Pedersen Marcel A.J. Somers In-situ interstitial alloying during laser powder bed fusion of AISI 316 for superior corrosion resistance Additive Manufacturing Letters Austenitic stainless steel 316L Chromium nitride L-PBF Corrosion resistance Additive manufacturing |
| title | In-situ interstitial alloying during laser powder bed fusion of AISI 316 for superior corrosion resistance |
| title_full | In-situ interstitial alloying during laser powder bed fusion of AISI 316 for superior corrosion resistance |
| title_fullStr | In-situ interstitial alloying during laser powder bed fusion of AISI 316 for superior corrosion resistance |
| title_full_unstemmed | In-situ interstitial alloying during laser powder bed fusion of AISI 316 for superior corrosion resistance |
| title_short | In-situ interstitial alloying during laser powder bed fusion of AISI 316 for superior corrosion resistance |
| title_sort | in situ interstitial alloying during laser powder bed fusion of aisi 316 for superior corrosion resistance |
| topic | Austenitic stainless steel 316L Chromium nitride L-PBF Corrosion resistance Additive manufacturing |
| url | http://www.sciencedirect.com/science/article/pii/S2772369021000062 |
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