Effects of NiAl on precipitation behavior and mechanical properties of M2C strengthened secondary hardening steel
A novel dual-precipitation steel was developed by introducing NiAl into secondary hardening ultrahigh strength steel. This steel exhibited a yield strength of 1.9 GPa, an ultimate tensile strength of 2.3 GPa, and an elongation of 9%. These exceptional mechanical properties can be primarily attribute...
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425002509 |
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| author | Yangxin Wang Aijun Li Tong wang Junjie Sheng Xin Cao Chundong Hu Han Dong |
| author_facet | Yangxin Wang Aijun Li Tong wang Junjie Sheng Xin Cao Chundong Hu Han Dong |
| author_sort | Yangxin Wang |
| collection | DOAJ |
| description | A novel dual-precipitation steel was developed by introducing NiAl into secondary hardening ultrahigh strength steel. This steel exhibited a yield strength of 1.9 GPa, an ultimate tensile strength of 2.3 GPa, and an elongation of 9%. These exceptional mechanical properties can be primarily attributed to the synergistic strengthening effects of nanoscale NiAl and M2C dual-precipitates during the aging process. The influence of NiAl on the precipitation behavior of M2C and its precipitation strengthening effect were studied using atom probe tomography, transmission electron microscopy, and first-principles calculations. The results indicate that the precipitation of NiAl in the steel induces M2C nucleation around NiAl, preventing the coarsening behavior typically observed when M2C precipitates alone, where precipitates aggregate along dislocations. The high number density of NiAl increases the number density of M2C and reduces their size. Furthermore, at higher aging temperatures, the precipitation of NiAl in the steel inhibits the coarsening of M2C, thereby delaying the trend of strength reduction in the steel. Under the dual-precipitation strengthening effect of nanoscale NiAl and M2C, the yield strength of the steel can be increased by up to 1130 MPa, which is significantly surpassing the strengthening effect from the single precipitation of M2C during the aging process. |
| format | Article |
| id | doaj-art-06c5e489aebb4f258a95a33ed2e5722a |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-06c5e489aebb4f258a95a33ed2e5722a2025-02-09T05:00:32ZengElsevierJournal of Materials Research and Technology2238-78542025-03-013531073117Effects of NiAl on precipitation behavior and mechanical properties of M2C strengthened secondary hardening steelYangxin Wang0Aijun Li1Tong wang2Junjie Sheng3Xin Cao4Chundong Hu5Han Dong6School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai, 200444, China; Zhejiang Institute of Advanced Materials, SHU, Jiashan, 314100, ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai, 200444, ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai, 200444, ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai, 200444, ChinaZhejiang Institute of Advanced Materials, SHU, Jiashan, 314100, ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai, 200444, China; Zhejiang Institute of Advanced Materials, SHU, Jiashan, 314100, China; Corresponding author. School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China.School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai, 200444, China; Zhejiang Institute of Advanced Materials, SHU, Jiashan, 314100, ChinaA novel dual-precipitation steel was developed by introducing NiAl into secondary hardening ultrahigh strength steel. This steel exhibited a yield strength of 1.9 GPa, an ultimate tensile strength of 2.3 GPa, and an elongation of 9%. These exceptional mechanical properties can be primarily attributed to the synergistic strengthening effects of nanoscale NiAl and M2C dual-precipitates during the aging process. The influence of NiAl on the precipitation behavior of M2C and its precipitation strengthening effect were studied using atom probe tomography, transmission electron microscopy, and first-principles calculations. The results indicate that the precipitation of NiAl in the steel induces M2C nucleation around NiAl, preventing the coarsening behavior typically observed when M2C precipitates alone, where precipitates aggregate along dislocations. The high number density of NiAl increases the number density of M2C and reduces their size. Furthermore, at higher aging temperatures, the precipitation of NiAl in the steel inhibits the coarsening of M2C, thereby delaying the trend of strength reduction in the steel. Under the dual-precipitation strengthening effect of nanoscale NiAl and M2C, the yield strength of the steel can be increased by up to 1130 MPa, which is significantly surpassing the strengthening effect from the single precipitation of M2C during the aging process.http://www.sciencedirect.com/science/article/pii/S2238785425002509Ultrahigh strength steelMechanical propertiesPrecipitationFirst-principle calculation |
| spellingShingle | Yangxin Wang Aijun Li Tong wang Junjie Sheng Xin Cao Chundong Hu Han Dong Effects of NiAl on precipitation behavior and mechanical properties of M2C strengthened secondary hardening steel Journal of Materials Research and Technology Ultrahigh strength steel Mechanical properties Precipitation First-principle calculation |
| title | Effects of NiAl on precipitation behavior and mechanical properties of M2C strengthened secondary hardening steel |
| title_full | Effects of NiAl on precipitation behavior and mechanical properties of M2C strengthened secondary hardening steel |
| title_fullStr | Effects of NiAl on precipitation behavior and mechanical properties of M2C strengthened secondary hardening steel |
| title_full_unstemmed | Effects of NiAl on precipitation behavior and mechanical properties of M2C strengthened secondary hardening steel |
| title_short | Effects of NiAl on precipitation behavior and mechanical properties of M2C strengthened secondary hardening steel |
| title_sort | effects of nial on precipitation behavior and mechanical properties of m2c strengthened secondary hardening steel |
| topic | Ultrahigh strength steel Mechanical properties Precipitation First-principle calculation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425002509 |
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