Experimental evidence for “double-edged sword” effect of the fibrous δ-ferrite on mechanical properties: a case study of Fe-5.95Mn-1.55Si-1.0Al-0.055C medium-Mn steel
An ingenious thermo-mechanical treatment process was utilized on a Fe-5.95Mn-1.55Si-1.0Al-0.055C medium-Mn steel to investigate the effect of fibrous δ-ferrites on mechanical properties. With a large enough cold-rolling reduction ratio (∼70%), the morphology of coarsened fibrous δ-ferrites is tailor...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422005774 |
| _version_ | 1818149844963819520 |
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| author | Shu Yan Tianle Li Zigan Xu Taosha Liang Sai Wang Xianghua Liu |
| author_facet | Shu Yan Tianle Li Zigan Xu Taosha Liang Sai Wang Xianghua Liu |
| author_sort | Shu Yan |
| collection | DOAJ |
| description | An ingenious thermo-mechanical treatment process was utilized on a Fe-5.95Mn-1.55Si-1.0Al-0.055C medium-Mn steel to investigate the effect of fibrous δ-ferrites on mechanical properties. With a large enough cold-rolling reduction ratio (∼70%), the morphology of coarsened fibrous δ-ferrites is tailored into homogeneous distributed fragments, which provides a precondition to launch the present study. Direct experimental evidence has been obtained that fibrous δ-ferrites are a double-edged sword for mechanical properties: it improves ductility (by 3.5% ± 1.1%) but decreases tensile strength (by 65 ± 11.5 MPa). This can be related to the accommodation effect of dislocations within coarsened fibrous δ-ferrite grains as soft phase, which decreases the degree of dislocation pile-ups in martensitic matrix, resulting in the limited strengthening effect of dislocations. Additionally, despite significant directionality along rolling direction, the fibrous δ-ferrite grains do not result in anisotropic properties. |
| first_indexed | 2024-12-11T13:13:30Z |
| format | Article |
| id | doaj.art-e5748fff1d9d4b4f9cf4bf0bd8eeebd5 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-11T13:13:30Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-e5748fff1d9d4b4f9cf4bf0bd8eeebd52022-12-22T01:06:08ZengElsevierJournal of Materials Research and Technology2238-78542022-05-011838343840Experimental evidence for “double-edged sword” effect of the fibrous δ-ferrite on mechanical properties: a case study of Fe-5.95Mn-1.55Si-1.0Al-0.055C medium-Mn steelShu Yan0Tianle Li1Zigan Xu2Taosha Liang3Sai Wang4Xianghua Liu5School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Key Laboratory of Lightweight Structural Materials, Liaoning Province, Northeastern University, Shenyang 110819, China; Corresponding author.Department of Plasticity Technology, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China; Corresponding author.Steel Institute (IEHK), RWTH Aachen University, Aachen 52072, Aachen, GermanyShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaSchool of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Key Laboratory of Lightweight Structural Materials, Liaoning Province, Northeastern University, Shenyang 110819, ChinaSchool of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Key Laboratory of Lightweight Structural Materials, Liaoning Province, Northeastern University, Shenyang 110819, China; Frontiers Science Center for Industrial Intelligence and Systems Optimization, Northeastern University, Shenyang 110819, ChinaAn ingenious thermo-mechanical treatment process was utilized on a Fe-5.95Mn-1.55Si-1.0Al-0.055C medium-Mn steel to investigate the effect of fibrous δ-ferrites on mechanical properties. With a large enough cold-rolling reduction ratio (∼70%), the morphology of coarsened fibrous δ-ferrites is tailored into homogeneous distributed fragments, which provides a precondition to launch the present study. Direct experimental evidence has been obtained that fibrous δ-ferrites are a double-edged sword for mechanical properties: it improves ductility (by 3.5% ± 1.1%) but decreases tensile strength (by 65 ± 11.5 MPa). This can be related to the accommodation effect of dislocations within coarsened fibrous δ-ferrite grains as soft phase, which decreases the degree of dislocation pile-ups in martensitic matrix, resulting in the limited strengthening effect of dislocations. Additionally, despite significant directionality along rolling direction, the fibrous δ-ferrite grains do not result in anisotropic properties.http://www.sciencedirect.com/science/article/pii/S2238785422005774Medium-Mn steelδ-ferriteMechanical propertyDislocation |
| spellingShingle | Shu Yan Tianle Li Zigan Xu Taosha Liang Sai Wang Xianghua Liu Experimental evidence for “double-edged sword” effect of the fibrous δ-ferrite on mechanical properties: a case study of Fe-5.95Mn-1.55Si-1.0Al-0.055C medium-Mn steel Journal of Materials Research and Technology Medium-Mn steel δ-ferrite Mechanical property Dislocation |
| title | Experimental evidence for “double-edged sword” effect of the fibrous δ-ferrite on mechanical properties: a case study of Fe-5.95Mn-1.55Si-1.0Al-0.055C medium-Mn steel |
| title_full | Experimental evidence for “double-edged sword” effect of the fibrous δ-ferrite on mechanical properties: a case study of Fe-5.95Mn-1.55Si-1.0Al-0.055C medium-Mn steel |
| title_fullStr | Experimental evidence for “double-edged sword” effect of the fibrous δ-ferrite on mechanical properties: a case study of Fe-5.95Mn-1.55Si-1.0Al-0.055C medium-Mn steel |
| title_full_unstemmed | Experimental evidence for “double-edged sword” effect of the fibrous δ-ferrite on mechanical properties: a case study of Fe-5.95Mn-1.55Si-1.0Al-0.055C medium-Mn steel |
| title_short | Experimental evidence for “double-edged sword” effect of the fibrous δ-ferrite on mechanical properties: a case study of Fe-5.95Mn-1.55Si-1.0Al-0.055C medium-Mn steel |
| title_sort | experimental evidence for double edged sword effect of the fibrous δ ferrite on mechanical properties a case study of fe 5 95mn 1 55si 1 0al 0 055c medium mn steel |
| topic | Medium-Mn steel δ-ferrite Mechanical property Dislocation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422005774 |
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