Effects of cerium addition on the microstructure, mechanical properties and strain hardening behavior of TWIP steel Fe-18Mn-0.6C

ZHONG, Lingqiang, WANG, Zhigang, LUO, Quanshun and LIU, Weizhen (2022). Effects of cerium addition on the microstructure, mechanical properties and strain hardening behavior of TWIP steel Fe-18Mn-0.6C. Materials Characterization, 183.

[img] PDF
Luo-EffectsCeriumAddition(AM).pdf - Accepted Version
Restricted to Repository staff only until 27 November 2022.
Creative Commons Attribution Non-commercial No Derivatives.

Download (3MB)
Official URL: https://www.sciencedirect.com/science/article/abs/...
Link to published version:: https://doi.org/10.1016/j.matchar.2021.111626
Related URLs:

    Abstract

    The effects of cerium (Ce) on the microstructure, mechanical properties and strain hardening behavior of Fe-18Mn-0.6C twin-induced plasticity (TWIP) steel were investigated by electron backscatter diffraction, X-ray diffraction and transmission electron microscopy. Compared with the addition of Al, the addition of Ce significantly reduced the stacking fault energy of TWIP steel, which promotes the formation of deformation and annealing twins. The dynamic strain aging behavior of TWIP steel was inhibited by Al and Ce atoms during plastic deformation. The optimal mechanical properties were obtained when 0.015 wt% of Ce was added, resulting in a tensile strength of 1023 MPa; and an elongation was 92%. The interaction of twin variants in the Ce-containing alloys exhibited an X shape, which was significantly different from the T shape in the non-Ce containing alloy. This is mainly attributed to the fact that Ce promotes dislocations near grain boundaries, where for the nucleation of deformation twins at grain boundaries is favored. Compared with the T-shaped twin variants, the dynamic Hall-Petch effect caused by the X-shaped staggered twin variants was stronger, which improved the strain hardening ability of TWIP steel.

    Item Type: Article
    Identification Number: https://doi.org/10.1016/j.matchar.2021.111626
    Depositing User: Colin Knott
    Date Deposited: 06 Dec 2021 09:32
    Last Modified: 06 Dec 2021 09:45
    URI: http://shura.shu.ac.uk/id/eprint/29431

    Actions (login required)

    View Item View Item

    Downloads

    Downloads per month over past year

    View more statistics