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Stable, Ductile and Strong Ultrafine HT-9 Steels via Large Strain Machining
Beyond the current commercial materials, refining the grain size is among the proposed strategies to manufacture resilient materials for industrial applications demanding high resistance to severe environments. Here, large strain machining (LSM) was used to manufacture nanostructured HT-9 steel with...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8541452/ https://www.ncbi.nlm.nih.gov/pubmed/34684979 http://dx.doi.org/10.3390/nano11102538 |
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author | El-Atwani, Osman Kim, Hyosim Gigax, Jonathan G. Harvey, Cayla Aytuna, Berk Efe, Mert Maloy, Stuart A. |
author_facet | El-Atwani, Osman Kim, Hyosim Gigax, Jonathan G. Harvey, Cayla Aytuna, Berk Efe, Mert Maloy, Stuart A. |
author_sort | El-Atwani, Osman |
collection | PubMed |
description | Beyond the current commercial materials, refining the grain size is among the proposed strategies to manufacture resilient materials for industrial applications demanding high resistance to severe environments. Here, large strain machining (LSM) was used to manufacture nanostructured HT-9 steel with enhanced thermal stability, mechanical properties, and ductility. Nanocrystalline HT-9 steels with different aspect rations are achieved. In-situ transmission electron microscopy annealing experiments demonstrated that the nanocrystalline grains have excellent thermal stability up to 700 °C with no additional elemental segregation on the grain boundaries other than the initial carbides, attributing the thermal stability of the LSM materials to the low dislocation densities and strains in the final microstructure. Nano-indentation and micro-tensile testing performed on the LSM material pre- and post-annealing demonstrated the possibility of tuning the material’s strength and ductility. The results expound on the possibility of manufacturing controlled nanocrystalline materials via a scalable and cost-effective method, albeit with additional fundamental understanding of the resultant morphology dependence on the LSM conditions. |
format | Online Article Text |
id | pubmed-8541452 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-85414522021-10-24 Stable, Ductile and Strong Ultrafine HT-9 Steels via Large Strain Machining El-Atwani, Osman Kim, Hyosim Gigax, Jonathan G. Harvey, Cayla Aytuna, Berk Efe, Mert Maloy, Stuart A. Nanomaterials (Basel) Article Beyond the current commercial materials, refining the grain size is among the proposed strategies to manufacture resilient materials for industrial applications demanding high resistance to severe environments. Here, large strain machining (LSM) was used to manufacture nanostructured HT-9 steel with enhanced thermal stability, mechanical properties, and ductility. Nanocrystalline HT-9 steels with different aspect rations are achieved. In-situ transmission electron microscopy annealing experiments demonstrated that the nanocrystalline grains have excellent thermal stability up to 700 °C with no additional elemental segregation on the grain boundaries other than the initial carbides, attributing the thermal stability of the LSM materials to the low dislocation densities and strains in the final microstructure. Nano-indentation and micro-tensile testing performed on the LSM material pre- and post-annealing demonstrated the possibility of tuning the material’s strength and ductility. The results expound on the possibility of manufacturing controlled nanocrystalline materials via a scalable and cost-effective method, albeit with additional fundamental understanding of the resultant morphology dependence on the LSM conditions. MDPI 2021-09-28 /pmc/articles/PMC8541452/ /pubmed/34684979 http://dx.doi.org/10.3390/nano11102538 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article El-Atwani, Osman Kim, Hyosim Gigax, Jonathan G. Harvey, Cayla Aytuna, Berk Efe, Mert Maloy, Stuart A. Stable, Ductile and Strong Ultrafine HT-9 Steels via Large Strain Machining |
title | Stable, Ductile and Strong Ultrafine HT-9 Steels via Large Strain Machining |
title_full | Stable, Ductile and Strong Ultrafine HT-9 Steels via Large Strain Machining |
title_fullStr | Stable, Ductile and Strong Ultrafine HT-9 Steels via Large Strain Machining |
title_full_unstemmed | Stable, Ductile and Strong Ultrafine HT-9 Steels via Large Strain Machining |
title_short | Stable, Ductile and Strong Ultrafine HT-9 Steels via Large Strain Machining |
title_sort | stable, ductile and strong ultrafine ht-9 steels via large strain machining |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8541452/ https://www.ncbi.nlm.nih.gov/pubmed/34684979 http://dx.doi.org/10.3390/nano11102538 |
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