| Hot Deformation Behavior of an Ultra-High-Strength Fe-Ni-Co-Based Maraging Steel | |
| Zhang, Le1,2; Wang, Wei3; Shahzad, M. Babar1; Shan, Yi-Yin1,3; Yang, Ke1 | |
| Corresponding Author | Wang, Wei(wangw@imr.ac.cn) ; Yang, Ke(kyang@imr.ac.cn) |
| 2019-09-01 | |
| Source Publication | ACTA METALLURGICA SINICA-ENGLISH LETTERS
 |
| ISSN | 1006-7191 |
| Volume | 32Issue:9Pages:1161-1172 |
| Abstract | Hot processing behavior of an ultra-high-strength Fe-Ni-Co-based maraging steel was studied in temperature range of 900-1200 degrees C and strain rate range of 0.001-10s(-1). Deformation processing parameters and optimum hot working window were characterized via flow stress analysis, constitutive equation construction, hot processing map calculation and microstructure evolution, respectively. Critical strain value for dynamic recrystallization was determined through theoretical mathematical differential method: the inflection point of theta-sigma and -partial derivative theta/partial derivative sigma-sigma curves. It was found that the flow stress increased with the decrease in deformation temperature and increase in the strain rate. The power dissipation maps in the strain range of 0.1-0.6 were entirely similar with the tendency of contour lines which implied that strain had no strong effect on the dissipation maps. Nevertheless, the instability maps showed obvious strain sensitivity with increasing strain, which was ascribed to the flow localization and instability. The optimized hot processing window of the experimental steel was obtained as 1100-1200 degrees C/0.001-1s(-1) and 1000-1100 degrees C/0.001-0.1s(-1), with the efficiency range of 20-40%. Owing to high Mo content in the experimental steel, high dynamic activation energy, Q=439.311kJmol(-1), was achieved, indicating that dynamic recrystallization was difficult to occur in the hot deformation process, which was proved via microstructure analysis under different hot deformation conditions. |
| Keyword | Maraging steel Hot working Dynamic recrystallization Constitutive equation Hot processing map |
| Funding Organization | Youth Innovation Promotion Association of Chinese Academy of Sciences ; National Natural Science Foundation of China ; Innovation Project of Institute of Metal Research ; National Natural Science Foundation of China Research Fund for International Young Scientists |
| DOI | 10.1007/s40195-019-00913-3 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Youth Innovation Promotion Association of Chinese Academy of Sciences[2017233] ; National Natural Science Foundation of China[51472249] ; Innovation Project of Institute of Metal Research[2015-ZD04] ; National Natural Science Foundation of China Research Fund for International Young Scientists[51750110515] |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000477005900011 |
| Publisher | CHINESE ACAD SCIENCES, INST METAL RESEARCH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/134725 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wang, Wei; Yang, Ke |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Le,Wang, Wei,Shahzad, M. Babar,et al. Hot Deformation Behavior of an Ultra-High-Strength Fe-Ni-Co-Based Maraging Steel[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2019,32(9):1161-1172. |
| APA | Zhang, Le,Wang, Wei,Shahzad, M. Babar,Shan, Yi-Yin,&Yang, Ke.(2019).Hot Deformation Behavior of an Ultra-High-Strength Fe-Ni-Co-Based Maraging Steel.ACTA METALLURGICA SINICA-ENGLISH LETTERS,32(9),1161-1172. |
| MLA | Zhang, Le,et al."Hot Deformation Behavior of an Ultra-High-Strength Fe-Ni-Co-Based Maraging Steel".ACTA METALLURGICA SINICA-ENGLISH LETTERS 32.9(2019):1161-1172. |
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