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JOM

, Volume 70, Issue 5, pp 700–705 | Cite as

In-Situ Characterization of Deformation and Fracture Behavior of Hot-Rolled Medium Manganese Lightweight Steel

  • Zheng-zhi Zhao
  • Rong-hua Cao
  • Ju-hua Liang
  • Feng Li
  • Cheng Li
  • Shu-feng Yang
Characterization of Advanced High Strength Steels for Automobiles
First Online:
Received:
Accepted:

Abstract

The deformation and fracture behavior of hot-rolled medium manganese lightweight (0.32C-3.85Mn-4.18Al-1.53Si) steel was revealed by an in situ tensile test. Deformed δ-ferrite with plenty of cross-parallel deformation bands during in situ tensile tests provides δ-ferrite of good plasticity and ductility, although it is finally featured by the cleavage fracture. The soft and ductile δ-ferrite and high-volume fraction of austenite contribute to the superior mechanical properties of medium manganese lightweight steel heated at 800°C, with a tensile strength of 924 MPa, total elongation of 35.2% and product of the strength and elongation of 32.5 GPa %.

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Notes

Acknowledgements

Zhengzhi Zhao acknowledges the financial support from the National Natural Science Foundation of China (No. 51574028).

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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  • Zheng-zhi Zhao
    • 1
  • Rong-hua Cao
    • 1
  • Ju-hua Liang
    • 1
  • Feng Li
    • 1
  • Cheng Li
    • 1
  • Shu-feng Yang
    • 2
  1. 1.Collaborative Innovation Center of Steel TechnologyUniversity of Science and Technology BeijingBeijingChina
  2. 2.School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijingChina

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