Effects of nanostructural hierarchy on the hardness and thermal stability of an austenitic stainless steel
An austenitic stainless steel was processed by high-pressure torsion, and formed a hierarchical nanostructure with ultrafine grains, ultrafine-precipitates, nano-twins and high densities of dislocations. As a result, the hierarchical nanostructure contributes collectively to the double hardness valu...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-05-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542100226X |
| _version_ | 1819101178414235648 |
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| author | Wei Jiang Yang Cao Yingda Jiang Yanfang Liu Qingzhong Mao Hao Zhou Xiaozhou Liao Yonghao Zhao |
| author_facet | Wei Jiang Yang Cao Yingda Jiang Yanfang Liu Qingzhong Mao Hao Zhou Xiaozhou Liao Yonghao Zhao |
| author_sort | Wei Jiang |
| collection | DOAJ |
| description | An austenitic stainless steel was processed by high-pressure torsion, and formed a hierarchical nanostructure with ultrafine grains, ultrafine-precipitates, nano-twins and high densities of dislocations. As a result, the hierarchical nanostructure contributes collectively to the double hardness value of the austenitic stainless steel (514 ± 44 HV) in comparison to the coarse-grained counterpart (217 ± 11 HV). Both the nanostructural hierarchy and high hardness can be maintained at the temperatures up to ~600 °C. Annealing treatment at temperatures from 400 to 600 °C may induce recovery to the hierarchical nanostructure, resulting in a reduced microstructural heterogeneity and increased hardness for the high-pressure torsion processed steel. |
| first_indexed | 2024-12-22T01:14:32Z |
| format | Article |
| id | doaj.art-73881f93b6e749ea840b0495473a70ac |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-22T01:14:32Z |
| publishDate | 2021-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-73881f93b6e749ea840b0495473a70ac2022-12-21T18:43:54ZengElsevierJournal of Materials Research and Technology2238-78542021-05-0112376384Effects of nanostructural hierarchy on the hardness and thermal stability of an austenitic stainless steelWei Jiang0Yang Cao1Yingda Jiang2Yanfang Liu3Qingzhong Mao4Hao Zhou5Xiaozhou Liao6Yonghao Zhao7Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, ChinaNano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China; Corresponding authors.School of Materials Science and Engineering, Shenyang Ligong University, Shenyang, 110159, ChinaNano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, ChinaNano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, ChinaNano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, ChinaSchool of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW, 2006, AustraliaNano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China; Corresponding authors.An austenitic stainless steel was processed by high-pressure torsion, and formed a hierarchical nanostructure with ultrafine grains, ultrafine-precipitates, nano-twins and high densities of dislocations. As a result, the hierarchical nanostructure contributes collectively to the double hardness value of the austenitic stainless steel (514 ± 44 HV) in comparison to the coarse-grained counterpart (217 ± 11 HV). Both the nanostructural hierarchy and high hardness can be maintained at the temperatures up to ~600 °C. Annealing treatment at temperatures from 400 to 600 °C may induce recovery to the hierarchical nanostructure, resulting in a reduced microstructural heterogeneity and increased hardness for the high-pressure torsion processed steel.http://www.sciencedirect.com/science/article/pii/S223878542100226XSteelsThermal stabilitySevere plastic deformationTwinningMechanical properties |
| spellingShingle | Wei Jiang Yang Cao Yingda Jiang Yanfang Liu Qingzhong Mao Hao Zhou Xiaozhou Liao Yonghao Zhao Effects of nanostructural hierarchy on the hardness and thermal stability of an austenitic stainless steel Journal of Materials Research and Technology Steels Thermal stability Severe plastic deformation Twinning Mechanical properties |
| title | Effects of nanostructural hierarchy on the hardness and thermal stability of an austenitic stainless steel |
| title_full | Effects of nanostructural hierarchy on the hardness and thermal stability of an austenitic stainless steel |
| title_fullStr | Effects of nanostructural hierarchy on the hardness and thermal stability of an austenitic stainless steel |
| title_full_unstemmed | Effects of nanostructural hierarchy on the hardness and thermal stability of an austenitic stainless steel |
| title_short | Effects of nanostructural hierarchy on the hardness and thermal stability of an austenitic stainless steel |
| title_sort | effects of nanostructural hierarchy on the hardness and thermal stability of an austenitic stainless steel |
| topic | Steels Thermal stability Severe plastic deformation Twinning Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S223878542100226X |
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