Structures and Properties of Near-Rapidly Solidified Fe–12Mn–9Al–1.2C Dual-Phase Lightweight Steel Containing 3 wt% Ni

  • Jianlei Zhang
  • Wei He
  • Yang Yang
  • Yunhu Zhang
  • Lian Duan
  • Zhiping Luo
  • Changjiang Song
  • Qijie Zhai
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

Fe–Mn–Al–C lightweight steel possesses not only excellent comprehensive mechanical properties, but also a low density, which is attractive to the automotive industry. In the present paper, an austenite stabilizer Ni element which usually increases the austenite content was added and its effects on the structure and mechanical properties of a near-rapidly solidified Fe–12Mn–9Al–1.2C dual-phase lightweight steel strip were studied. It was found that the addition of 3% Ni did not show the potential to increase the austenite content or enhance the mechanical properties of Fe–12Mn–9Al–1.2C dual-phase lightweight steel strip. Moreover, the addition of 3% Ni deteriorated the thermal stability of Fe–12Mn–9Al–1.2C steel. In the strip with the addition of Ni, the formed metastable austenite almost fully transformed into ferrite + κ-carbide at a lower annealing temperature. The formation process of constituent phase in this near-rapidly solidified dual-phase lightweight steel was analyzed. The related results suggested that the constituent phases of the near-rapidly solidified dual-phase lightweight steel depended on the liquid/solid transition, which was controlled by both thermodynamics and kinetics factors.

Keywords

Near-rapid solidification Mechanical property Microstructure Dual-phase lightweight steel Ni element 

Notes

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51574162) and Joint Fund of Iron and Steel Research (No. U1660103). The authors would like to express sincere thanks for the support staff at the Instrumental Analysis & Research Center at Shanghai University and the Center for Advanced Solidification Technology.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Jianlei Zhang
    • 1
  • Wei He
    • 1
  • Yang Yang
    • 1
  • Yunhu Zhang
    • 1
  • Lian Duan
    • 1
  • Zhiping Luo
    • 2
  • Changjiang Song
    • 1
  • Qijie Zhai
    • 1
  1. 1.State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy and School of Materials Science and EngineeringShanghai UniversityShanghaiChina
  2. 2.Department of Chemistry and PhysicsFayetteville State UniversityFayettevilleUSA

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