| Simultaneous enhancement of strength and toughness of ultrafine-grained dual-phase steel with a bimodal lamellar microstructure | |
| Su, Yuanfei1,2; Xu, Xiaoning1; Li, Huijie1; Ye, Qibin3 | |
| Corresponding Author | Ye, Qibin(yeqb-iris@shasteel.cn) |
| 2023-03-15 | |
| Source Publication | MATERIALS LETTERS
 |
| ISSN | 0167-577X |
| Volume | 335Pages:5 |
| Abstract | A novel heterogeneous lamellar microstructure with ultrafine grains was successfully introduced into a DP590 steel plate using a simple two-step controlled rolling process (TCR) described in this work. The ferrite and martensite are laminated, with an average size of 1.7 mu m and 1.2 mu m, respectively. The ferrite shows a bimodal grain size distribution and intensified alpha-fiber and rotated cubic texture. Compared to conventional controlled-roll (CCR) steel, TCR steel demonstrated 46.6 % higher tensile strength with a considerably higher work hardening rate while maintaining a reasonably high uniform elongation of 12.1 %. Furthermore, the impact energy at -60 degrees C was increased by almost 100 %. The ultrafine-grained lamellar microstructure in TCR steel was believed to be responsible for the synergistic deformation and delamination fracture toughening that resulted in the simultaneous improvement in tensile and impact properties. |
| Keyword | Ultrafine grain Heterogeneous lamellar structure Dual -phase steel High strength Working hardening Low -temperature toughness |
| Funding Organization | Major R & D Project of Liaoning Province |
| DOI | 10.1016/j.matlet.2022.133732 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Major R & D Project of Liaoning Province[2020JH1/10100001] |
| WOS Research Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Multidisciplinary ; Physics, Applied |
| WOS ID | WOS:000920833100001 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/175366 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Ye, Qibin |
| Affiliation | 1.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 3.Sha Steel Co Ltd, Inst Res Iron & Steel, Zhangjiagang 215624, Jiangsu, Peoples R China |
| Recommended Citation GB/T 7714 | Su, Yuanfei,Xu, Xiaoning,Li, Huijie,et al. Simultaneous enhancement of strength and toughness of ultrafine-grained dual-phase steel with a bimodal lamellar microstructure[J]. MATERIALS LETTERS,2023,335:5. |
| APA | Su, Yuanfei,Xu, Xiaoning,Li, Huijie,&Ye, Qibin.(2023).Simultaneous enhancement of strength and toughness of ultrafine-grained dual-phase steel with a bimodal lamellar microstructure.MATERIALS LETTERS,335,5. |
| MLA | Su, Yuanfei,et al."Simultaneous enhancement of strength and toughness of ultrafine-grained dual-phase steel with a bimodal lamellar microstructure".MATERIALS LETTERS 335(2023):5. |
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