Improving the ductility of ultrahigh strength lath martensite through heterogeneous carbon distribution
This investigation aims to improve the ductility of ultrahigh strength (>2 GPa) press hardening steels (PHS) by exploiting the heterogeneous carbon distribution in lath martensite. The proposed strategy is demonstrated in a medium carbon PHS with a lath martensite microstructure produced by quenc...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-11-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423030028 |
| _version_ | 1797301430956064768 |
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| author | Jiming Huang Liejun Li Zhichao Luo Mingxin Huang Zhengwu Peng Jixiang Gao Haibo Ke Zhiyuan Liang |
| author_facet | Jiming Huang Liejun Li Zhichao Luo Mingxin Huang Zhengwu Peng Jixiang Gao Haibo Ke Zhiyuan Liang |
| author_sort | Jiming Huang |
| collection | DOAJ |
| description | This investigation aims to improve the ductility of ultrahigh strength (>2 GPa) press hardening steels (PHS) by exploiting the heterogeneous carbon distribution in lath martensite. The proposed strategy is demonstrated in a medium carbon PHS with a lath martensite microstructure produced by quenching austenite. It is found that by enhancing auto-tempering, the solute carbon content in the coarse laths formed earlier during martensitic transformation can be reduced, leading to the softening and ductilizing of these laths. The softened coarse laths of small volume fraction provide significant improvement in the post-uniform elongation (PUE) without compromising the ultrahigh strength of lath martensite. The remarkable improvement in the PUE of ultrastrong lath martensite achieved by exploiting heterogeneous carbon distribution is expected to be instructive for the development of ultrahigh strength PHS with good ductility and fracture toughness. |
| first_indexed | 2024-03-07T23:21:28Z |
| format | Article |
| id | doaj.art-02be85b3a8854b669665f6919e70ea46 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-07T23:21:28Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-02be85b3a8854b669665f6919e70ea462024-02-21T05:28:34ZengElsevierJournal of Materials Research and Technology2238-78542023-11-012782098215Improving the ductility of ultrahigh strength lath martensite through heterogeneous carbon distributionJiming Huang0Liejun Li1Zhichao Luo2Mingxin Huang3Zhengwu Peng4Jixiang Gao5Haibo Ke6Zhiyuan Liang7National Engineering Research Center of Near-net Shape Forming Technology for Metallic Materials, South China University of Technology, Guangzhou, 510641, China; Songshan Lake Materials Laboratory, Dongguan, 523808, ChinaNational Engineering Research Center of Near-net Shape Forming Technology for Metallic Materials, South China University of Technology, Guangzhou, 510641, China; Corresponding author.Institute of New Materials, Guangdong Academy of Sciences, Guangzhou, 510651, ChinaDepartment of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, ChinaDepartment of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, ChinaGuangdong Polytechnic Normal University, Guangzhou, 510665, ChinaSongshan Lake Materials Laboratory, Dongguan, 523808, ChinaSongshan Lake Materials Laboratory, Dongguan, 523808, China; Corresponding author.This investigation aims to improve the ductility of ultrahigh strength (>2 GPa) press hardening steels (PHS) by exploiting the heterogeneous carbon distribution in lath martensite. The proposed strategy is demonstrated in a medium carbon PHS with a lath martensite microstructure produced by quenching austenite. It is found that by enhancing auto-tempering, the solute carbon content in the coarse laths formed earlier during martensitic transformation can be reduced, leading to the softening and ductilizing of these laths. The softened coarse laths of small volume fraction provide significant improvement in the post-uniform elongation (PUE) without compromising the ultrahigh strength of lath martensite. The remarkable improvement in the PUE of ultrastrong lath martensite achieved by exploiting heterogeneous carbon distribution is expected to be instructive for the development of ultrahigh strength PHS with good ductility and fracture toughness.http://www.sciencedirect.com/science/article/pii/S2238785423030028Lath martensiteCarbon distributionDuctilityUltrahigh strengthMartensitic transformation |
| spellingShingle | Jiming Huang Liejun Li Zhichao Luo Mingxin Huang Zhengwu Peng Jixiang Gao Haibo Ke Zhiyuan Liang Improving the ductility of ultrahigh strength lath martensite through heterogeneous carbon distribution Journal of Materials Research and Technology Lath martensite Carbon distribution Ductility Ultrahigh strength Martensitic transformation |
| title | Improving the ductility of ultrahigh strength lath martensite through heterogeneous carbon distribution |
| title_full | Improving the ductility of ultrahigh strength lath martensite through heterogeneous carbon distribution |
| title_fullStr | Improving the ductility of ultrahigh strength lath martensite through heterogeneous carbon distribution |
| title_full_unstemmed | Improving the ductility of ultrahigh strength lath martensite through heterogeneous carbon distribution |
| title_short | Improving the ductility of ultrahigh strength lath martensite through heterogeneous carbon distribution |
| title_sort | improving the ductility of ultrahigh strength lath martensite through heterogeneous carbon distribution |
| topic | Lath martensite Carbon distribution Ductility Ultrahigh strength Martensitic transformation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423030028 |
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