High Temperature Deformation Behavior and Microstructure Evolution of Low-Density Steel Fe30Mn11Al1C Micro-Alloyed with Nb and V
The thermal processing parameters is very important to the hot rolling and forging process for producing grain refinement in lightweight high-manganese and aluminum steels. In this work, the high temperature deformation behaviors of a low-density steel of Fe30Mn11Al1C alloyed with 0.1Nb and 0.1V wer...
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oai:doaj.org-article:1dab34b69182465eb052ecdc7fd1a7862021-11-11T18:07:02ZHigh Temperature Deformation Behavior and Microstructure Evolution of Low-Density Steel Fe30Mn11Al1C Micro-Alloyed with Nb and V10.3390/ma142165551996-1944https://doaj.org/article/1dab34b69182465eb052ecdc7fd1a7862021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6555https://doaj.org/toc/1996-1944The thermal processing parameters is very important to the hot rolling and forging process for producing grain refinement in lightweight high-manganese and aluminum steels. In this work, the high temperature deformation behaviors of a low-density steel of Fe30Mn11Al1C alloyed with 0.1Nb and 0.1V were studied by isothermal hot compression tests at temperatures of 850–1150 °C and strain rates between 0.01 s<sup>−1</sup> and 10 s<sup>−1</sup>. It was found that the flow stress constitutive model could be effectively established by the Arrhenius based hyperbolic sine equation with an activation energy of about 389.1 kJ/mol. The thermal processing maps were developed based on the dynamic material model at different strains. It’s shown that the safe region for high temperatures in a very broad range of both deformation temperature and deformation strain and only a small unstable high deformation region, located at low temperatures lower than 950 °C. The deformation microstructures were found to be fully recrystallized microstructure in the safe deformation region and the grain size decreases along with decreasing temperature and increasing strain rate. Whereas the deformation microstructures is composed by grain refinement-recrystallized grains and a small fraction of non-recrystallized microstructure in the unstable deformation region, indicating that the deformation behaviors controlled by continuous dynamic recrystallization. The Hall Petch relationship between microhardness and the grain size of the high temperature deformed materials indicates that high strength low-density steel could be developed by a relative low temperature deformation and high strain rate.Hui WangZiyuan GaoZhiyue ShiHaifeng XuLing ZhangGuilin WuChang WangCunyu WangYuqing WengWenquan CaoMDPI AGarticlelow-density steelhigh temperature deformationthermal processing mapdynamic recrystallizationcontinuous dynamic recrystallizationTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6555, p 6555 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
low-density steel high temperature deformation thermal processing map dynamic recrystallization continuous dynamic recrystallization Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 |
| spellingShingle |
low-density steel high temperature deformation thermal processing map dynamic recrystallization continuous dynamic recrystallization Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Hui Wang Ziyuan Gao Zhiyue Shi Haifeng Xu Ling Zhang Guilin Wu Chang Wang Cunyu Wang Yuqing Weng Wenquan Cao High Temperature Deformation Behavior and Microstructure Evolution of Low-Density Steel Fe30Mn11Al1C Micro-Alloyed with Nb and V |
| description |
The thermal processing parameters is very important to the hot rolling and forging process for producing grain refinement in lightweight high-manganese and aluminum steels. In this work, the high temperature deformation behaviors of a low-density steel of Fe30Mn11Al1C alloyed with 0.1Nb and 0.1V were studied by isothermal hot compression tests at temperatures of 850–1150 °C and strain rates between 0.01 s<sup>−1</sup> and 10 s<sup>−1</sup>. It was found that the flow stress constitutive model could be effectively established by the Arrhenius based hyperbolic sine equation with an activation energy of about 389.1 kJ/mol. The thermal processing maps were developed based on the dynamic material model at different strains. It’s shown that the safe region for high temperatures in a very broad range of both deformation temperature and deformation strain and only a small unstable high deformation region, located at low temperatures lower than 950 °C. The deformation microstructures were found to be fully recrystallized microstructure in the safe deformation region and the grain size decreases along with decreasing temperature and increasing strain rate. Whereas the deformation microstructures is composed by grain refinement-recrystallized grains and a small fraction of non-recrystallized microstructure in the unstable deformation region, indicating that the deformation behaviors controlled by continuous dynamic recrystallization. The Hall Petch relationship between microhardness and the grain size of the high temperature deformed materials indicates that high strength low-density steel could be developed by a relative low temperature deformation and high strain rate. |
| format |
article |
| author |
Hui Wang Ziyuan Gao Zhiyue Shi Haifeng Xu Ling Zhang Guilin Wu Chang Wang Cunyu Wang Yuqing Weng Wenquan Cao |
| author_facet |
Hui Wang Ziyuan Gao Zhiyue Shi Haifeng Xu Ling Zhang Guilin Wu Chang Wang Cunyu Wang Yuqing Weng Wenquan Cao |
| author_sort |
Hui Wang |
| title |
High Temperature Deformation Behavior and Microstructure Evolution of Low-Density Steel Fe30Mn11Al1C Micro-Alloyed with Nb and V |
| title_short |
High Temperature Deformation Behavior and Microstructure Evolution of Low-Density Steel Fe30Mn11Al1C Micro-Alloyed with Nb and V |
| title_full |
High Temperature Deformation Behavior and Microstructure Evolution of Low-Density Steel Fe30Mn11Al1C Micro-Alloyed with Nb and V |
| title_fullStr |
High Temperature Deformation Behavior and Microstructure Evolution of Low-Density Steel Fe30Mn11Al1C Micro-Alloyed with Nb and V |
| title_full_unstemmed |
High Temperature Deformation Behavior and Microstructure Evolution of Low-Density Steel Fe30Mn11Al1C Micro-Alloyed with Nb and V |
| title_sort |
high temperature deformation behavior and microstructure evolution of low-density steel fe30mn11al1c micro-alloyed with nb and v |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/1dab34b69182465eb052ecdc7fd1a786 |
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