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  Hydrogen uptake and its influence in selective laser melted austenitic stainless steel: A nanoindentation study

Park, J.-M., Zhao, Y., Voisin, T., Lee, D.-H., Komazaki, S.-i., Ko, Y., et al. (2021). Hydrogen uptake and its influence in selective laser melted austenitic stainless steel: A nanoindentation study. Scripta Materialia, 194: 113718. doi:10.1016/j.scriptamat.2020.113718.

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 Creators:
Park, Jeong-Min1, Author              
Zhao, Yakai2, Author              
Voisin, Thomas3, Author
Lee, Dong-Hyun4, Author              
Komazaki, Shin-ichi5, Author
Ko, Yoonseok6, 7, Author
Kim, Dong-Ik6, Author
Suh, Jin-Yoo6, Author
Han, Heung Nam7, Author
Wang, Y. Morris3, 8, Author
Ramamurty, Upadrasta9, Author              
Jang, Jae-il1, Author
Affiliations:
1Division of Materials Science and Engineering, Hanyang University, Seoul, 04763, South Korea, ou_persistent22              
2School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China, ou_persistent22              
3Materials Science Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA, ou_persistent22              
4Alloys for Additive Manufacturing, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_2117289              
5Department of Mechanical Engineering, Kagoshima University, Kagoshima 890-0065, Japan, ou_persistent22              
6Center for Energy Materials Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea, ou_persistent22              
7Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea, ou_persistent22              
8Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA, ou_persistent22              
9School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, ou_persistent22              

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Free keywords: Cells; Cytology; Forward scattering; Hardness; Hydrogen; Nanoindentation; Thermal desorption spectroscopy, 316L austenitic stainless steel; Cell structure; Cell walls; Effect of hydrogen; Hydrogen uptake; Nanoindentation experiments; Scattered electrons; Statistical distribution, Austenitic stainless steel
 Abstract: The effect of hydrogen (H) charging on the nanoindentation response of a selective laser melted (SLM) 316L austenitic stainless steel was investigated and compared with its conventionally manufactured (CM) counterpart. Results show that the hardness increment in the SLM samples due to H charging is relatively smaller. Thermal desorption spectroscopy analysis suggests that the charged SLM alloy has not only a smaller H content but a lower apparent H diffusivity in comparison to the CM alloy. This was attributed to the ultrafine solidification cell structure in the SLM alloy. Through the low-load nanoindentation experiments and forward-scattered electron imaging analysis, statistical distributions of the hardness of the cell walls and interiors were assessed. The cell walls, consisting of high-density dislocations with segregated elements, were relatively insensitive to H charging than the cell interiors. These results are discussed in terms of the apparent H solubility and diffusivity in the SLM alloy. © 2021

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Language(s): eng - English
 Dates: 2021-03-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.scriptamat.2020.113718
 Degree: -

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Title: Scripta Materialia
  Abbreviation : Scripta Mater.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier B. V.
Pages: - Volume / Issue: 194 Sequence Number: 113718 Start / End Page: - Identifier: ISSN: 1359-6462
CoNE: https://pure.mpg.de/cone/journals/resource/954926243506