Simultaneously improving the strength and ductility of Fe–22Mn–0.6C twinning-induced plasticity steel via nitrogen addition

H.K. Yang; Y.Z. Tian; Z.J. Zhang; Z.F. Zhang

doi:10.1016/j.msea.2018.01.019

Author(s)

H.K. Yang
Y.Z. Tian
Z.J. Zhang
Z.F. Zhang

Detail(s)

Original language	English
Pages (from-to)	276-280
Journal / Publication	Materials Science and Engineering A
Volume	715
Online published	6 Jan 2018
Publication status	Published - 7 Feb 2018

Link(s)

DOI	DOI https://doi.org/10.1016/j.msea.2018.01.019 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85040218369&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(14e34d91-06ec-47ef-9b14-800c4c4e0b40).html

Abstract

The effect of nitrogen addition on the mechanical properties of Fe–22Mn–0.6C (wt%) twinning-induced plasticity steel was studied. It was found that the stacking fault energies of the two steels were comparable, and the twinned grain fractions of FeMnC and FeMnC-N steels were similar before the true strain of 0.5. With increasing the strain to 0.7, the fraction of secondary twinned grain rose to support the further strong work-hardening rate of FeMnC-N steel. Moreover, the nitrogen addition suppressed the dynamic strain aging, which can trigger early shear fracture in FeMnC steel. Therefore, the work-hardening rate was kept increasing and the frequency of plastic instability was suppressed by nitrogen addition. As a result, the ultimate tensile strength and uniform elongation simultaneously increased in FeMnC-N steel.

Research Area(s)

Deformation twin, Dynamic strain aging, Nitrogen, Stacking fault energy, Twinning-induced plasticity (TWIP) steel

Citation Format(s)

[ RIS ] [ BibTeX ]

Simultaneously improving the strength and ductility of Fe–22Mn–0.6C twinning-induced plasticity steel via nitrogen addition. / Yang, H.K.; Tian, Y.Z.; Zhang, Z.J. et al.
In: Materials Science and Engineering A, Vol. 715, 07.02.2018, p. 276-280.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Yang, HK, Tian, YZ, Zhang, ZJ & Zhang, ZF 2018, 'Simultaneously improving the strength and ductility of Fe–22Mn–0.6C twinning-induced plasticity steel via nitrogen addition', Materials Science and Engineering A, vol. 715, pp. 276-280. https://doi.org/10.1016/j.msea.2018.01.019

Yang, H. K., Tian, Y. Z., Zhang, Z. J., & Zhang, Z. F. (2018). Simultaneously improving the strength and ductility of Fe–22Mn–0.6C twinning-induced plasticity steel via nitrogen addition. Materials Science and Engineering A, 715, 276-280. https://doi.org/10.1016/j.msea.2018.01.019

Yang HK, Tian YZ, Zhang ZJ, Zhang ZF. Simultaneously improving the strength and ductility of Fe–22Mn–0.6C twinning-induced plasticity steel via nitrogen addition. Materials Science and Engineering A. 2018 Feb 7;715:276-280. Epub 2018 Jan 6. doi: 10.1016/j.msea.2018.01.019

Yang, H.K. ; Tian, Y.Z. ; Zhang, Z.J. et al. / Simultaneously improving the strength and ductility of Fe–22Mn–0.6C twinning-induced plasticity steel via nitrogen addition. In: Materials Science and Engineering A. 2018 ; Vol. 715. pp. 276-280.