Effect of Hydrogen on the Tensile Behavior of Austenitic Stainless Steels 316L Produced by Laser-Powder Bed Fusion
Hydrogen was doped in austenitic stainless steel (ASS) 316L tensile samples produced by the laser-powder bed fusion (L-PBF) technique. For this aim, an electrochemical method was conducted under a high current density of 100 mA/cm<sup>2</sup> for three days to examine its sustainability...
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MDPI AG
2021-04-01
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| author | Farzaneh Khaleghifar Khashayar Razeghi Akbar Heidarzadeh Reza Taherzadeh Mousavian |
| author_facet | Farzaneh Khaleghifar Khashayar Razeghi Akbar Heidarzadeh Reza Taherzadeh Mousavian |
| author_sort | Farzaneh Khaleghifar |
| collection | DOAJ |
| description | Hydrogen was doped in austenitic stainless steel (ASS) 316L tensile samples produced by the laser-powder bed fusion (L-PBF) technique. For this aim, an electrochemical method was conducted under a high current density of 100 mA/cm<sup>2</sup> for three days to examine its sustainability under extreme hydrogen environments at ambient temperatures. The chemical composition of the starting powders contained a high amount of Ni, approximately 12.9 wt.%, as a strong austenite stabilizer. The tensile tests disclosed that hydrogen charging caused a minor reduction in the elongation to failure (approximately 3.5% on average) and ultimate tensile strength (UTS; approximately 2.1% on average) of the samples, using a low strain rate of 1.2 × 10<sup>−4</sup> s<sup>−1</sup>. It was also found that an increase in the strain rate from 1.2 × 10<sup>−4</sup> s<sup>−1</sup> to 4.8 × 10<sup>−4</sup> s<sup>−1</sup> led to a reduction of approximately 3.6% on average for the elongation to failure and 1.7% on average for UTS in the pre-charged samples. No trace of martensite was detected in the X-ray diffraction (XRD) analysis of the fractured samples thanks to the high Ni content, which caused a minor reduction in UTS × uniform elongation (UE) (GPa%) after the H charging. Considerable surface tearing was observed for the pre-charged sample after the tensile deformation. Additionally, some cracks were observed to be independent of the melt pool boundaries, indicating that such boundaries cannot necessarily act as a suitable area for the crack propagation. |
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| last_indexed | 2024-03-10T12:37:59Z |
| publishDate | 2021-04-01 |
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| spelling | doaj.art-c14211ba97754335bbff989115bee6352023-11-21T14:07:33ZengMDPI AGMetals2075-47012021-04-0111458610.3390/met11040586Effect of Hydrogen on the Tensile Behavior of Austenitic Stainless Steels 316L Produced by Laser-Powder Bed FusionFarzaneh Khaleghifar0Khashayar Razeghi1Akbar Heidarzadeh2Reza Taherzadeh Mousavian3Razi Applied Science Foundation, P.O. Box, Tehran 37531-46137, IranRazi Applied Science Foundation, P.O. Box, Tehran 37531-46137, IranDepartment of Materials Engineering, Azarbaijan Shahid Madani University, P.O. Box, Tabriz 53714-161, IranI-Form, Advanced Manufacturing Research Centre & Advanced Processing Technology Research Centre, School of Mechanical & Manufacturing Engineering, Dublin City University, 9 Dublin, IrelandHydrogen was doped in austenitic stainless steel (ASS) 316L tensile samples produced by the laser-powder bed fusion (L-PBF) technique. For this aim, an electrochemical method was conducted under a high current density of 100 mA/cm<sup>2</sup> for three days to examine its sustainability under extreme hydrogen environments at ambient temperatures. The chemical composition of the starting powders contained a high amount of Ni, approximately 12.9 wt.%, as a strong austenite stabilizer. The tensile tests disclosed that hydrogen charging caused a minor reduction in the elongation to failure (approximately 3.5% on average) and ultimate tensile strength (UTS; approximately 2.1% on average) of the samples, using a low strain rate of 1.2 × 10<sup>−4</sup> s<sup>−1</sup>. It was also found that an increase in the strain rate from 1.2 × 10<sup>−4</sup> s<sup>−1</sup> to 4.8 × 10<sup>−4</sup> s<sup>−1</sup> led to a reduction of approximately 3.6% on average for the elongation to failure and 1.7% on average for UTS in the pre-charged samples. No trace of martensite was detected in the X-ray diffraction (XRD) analysis of the fractured samples thanks to the high Ni content, which caused a minor reduction in UTS × uniform elongation (UE) (GPa%) after the H charging. Considerable surface tearing was observed for the pre-charged sample after the tensile deformation. Additionally, some cracks were observed to be independent of the melt pool boundaries, indicating that such boundaries cannot necessarily act as a suitable area for the crack propagation.https://www.mdpi.com/2075-4701/11/4/586laser powder bed fusion (L-PBF)hydrogen embrittlement (HE)austenitic stainless steels (ASSs)tensile properties |
| spellingShingle | Farzaneh Khaleghifar Khashayar Razeghi Akbar Heidarzadeh Reza Taherzadeh Mousavian Effect of Hydrogen on the Tensile Behavior of Austenitic Stainless Steels 316L Produced by Laser-Powder Bed Fusion Metals laser powder bed fusion (L-PBF) hydrogen embrittlement (HE) austenitic stainless steels (ASSs) tensile properties |
| title | Effect of Hydrogen on the Tensile Behavior of Austenitic Stainless Steels 316L Produced by Laser-Powder Bed Fusion |
| title_full | Effect of Hydrogen on the Tensile Behavior of Austenitic Stainless Steels 316L Produced by Laser-Powder Bed Fusion |
| title_fullStr | Effect of Hydrogen on the Tensile Behavior of Austenitic Stainless Steels 316L Produced by Laser-Powder Bed Fusion |
| title_full_unstemmed | Effect of Hydrogen on the Tensile Behavior of Austenitic Stainless Steels 316L Produced by Laser-Powder Bed Fusion |
| title_short | Effect of Hydrogen on the Tensile Behavior of Austenitic Stainless Steels 316L Produced by Laser-Powder Bed Fusion |
| title_sort | effect of hydrogen on the tensile behavior of austenitic stainless steels 316l produced by laser powder bed fusion |
| topic | laser powder bed fusion (L-PBF) hydrogen embrittlement (HE) austenitic stainless steels (ASSs) tensile properties |
| url | https://www.mdpi.com/2075-4701/11/4/586 |
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