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Scientific reports v.6, 2016년, pp.36810 -    SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Superstrength of nanograined steel with nanoscale intermetallic precipitates transformed from shock-compressed martensitic steel

Yu, Hailiang (School of Mechanical, Materials &Mechatronics Engineering, University of Wollongong, NSW 2500, Australia ) ; Yan, Ming (Department of Materials Science and Engineering, South University of Science and Technology of China, Shenzhen 518055, China ) ; Lu, Cheng (School of Mechanical, Materials &Mechatronics Engineering, University of Wollongong, NSW 2500, Australia ) ; Tieu, Anh Kiet (School of Mechanical, Materials &Mechatronics Engineering, University of Wollongong, NSW 2500, Australia ) ; Li, Huijun (School of Mechanical, Materials &Mechatronics Engineering, University of Wollongong, NSW 2500, Australia ) ; Zhu, Qiang (School of Mechanical, Materials &Mechatronics Engineering, University of Wollongong, NSW 2500, Australia ) ; Godbole, Ajit (School of Mechanical, Materials &Mechatronics Engineering, University of Wollongong, NSW 2500, Australia ) ; Li, Jintao (School of Mechanical, Materials &Mechatronics Engineering, University of Wollongong, NSW 2500, Australia ) ; Su, Lihong (School of Mechanical, Materials &Mechatronics Engineering, University of Wollongong, NSW 2500, Australia ) ; Kong, Charlie (Electron Microsco ) ;
  • 초록  

    An increasing number of industrial applications need superstrength steels. It is known that refined grains and nanoscale precipitates can increase strength. The hardest martensitic steel reported to date is C0.8 steel, whose nanohardness can reach 11.9 GPa through incremental interstitial solid solution strengthening. Here we report a nanograined (NG) steel dispersed with nanoscale precipitates which has an extraordinarily high hardness of 19.1 GPa. The NG steel (shock-compressed Armox 500T steel) was obtained under these conditions: high strain rate of 1.2 μs −1 , high temperature rise rate of 600 Kμs −1 and high pressure of 17 GPa. The mean grain size achieved was 39 nm and reinforcing precipitates were indexed in the NG steel. The strength of the NG steel is expected to be ~3950 MPa. The discovery of the NG steel offers a general pathway for designing new advanced steel materials with exceptional hardness and excellent strength.


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