Breaking the strength-ductility paradox in advanced nanostructured Fe-based alloys through combined Cu and Mn additions

H.J. Kong; T. Yang; R. Chen; S.Q. Yue; T.L. Zhang; B.X. Cao; C. Wang; W.H. Liu; J.H. Luan; Z.B. Jiao; B.W. Zhou; L.G. Meng; A. Wang; C.T. Liu

doi:10.1016/j.scriptamat.2020.05.008

Author(s)

R. Chen
S.Q. Yue
C. Wang
W.H. Liu
J.H. Luan
Z.B. Jiao
B.W. Zhou
L.G. Meng
A. Wang

Related Research Unit(s)

Detail(s)

Original language	English
Pages (from-to)	213-218
Journal / Publication	Scripta Materialia
Volume	186
Online published	5 Jun 2020
Publication status	Published - Sep 2020

Link(s)

DOI	DOI https://doi.org/10.1016/j.scriptamat.2020.05.008 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85085627889&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(a1f31172-dcad-4fd3-aebe-8f65056d294b).html

Abstract

The strength-ductility paradox is a long-sought challenge for all engineering materials. In this study, we escaped the strength-ductility trade-off by engineering nano-scale heterogeneities carefully in the advanced nanostructured Fe-based alloys through alloying with Cu and Mn additions. We demonstrated a triple ductility enhancement by 20% together with a strength improvement of 100MPa compared to the alloys with sole Cu additions, overturning a common understanding of the strength-ductility trade-off. The strength-ductility enhancement is attributed to the complex interplay between the transformation induced plasticity (TRIP) and the coherent nano-scale Cu precipitates as well as the resultant heterogeneous stress–strain partitioning and dislocation interactions.

Research Area(s)

Advanced nanostructured Fe-based alloys, Grain boundary precipitation, Nano-scale Cu precipitation, Strength-ductility paradox, Transformation induced plasticity (TRIP)

Citation Format(s)

[ RIS ] [ BibTeX ]

Breaking the strength-ductility paradox in advanced nanostructured Fe-based alloys through combined Cu and Mn additions. / Kong, H.J.; Yang, T.; Chen, R.; Yue, S.Q.; Zhang, T.L.; Cao, B.X.; Wang, C.; Liu, W.H.; Luan, J.H.; Jiao, Z.B.; Zhou, B.W.; Meng, L.G.; Wang, A.; Liu, C.T.

In: Scripta Materialia, Vol. 186, 09.2020, p. 213-218.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal

Kong, HJ , Yang, T, Chen, R, Yue, SQ, Zhang, TL , Cao, BX, Wang, C, Liu, WH, Luan, JH, Jiao, ZB, Zhou, BW, Meng, LG, Wang, A & Liu, CT 2020, 'Breaking the strength-ductility paradox in advanced nanostructured Fe-based alloys through combined Cu and Mn additions', Scripta Materialia, vol. 186, pp. 213-218. https://doi.org/10.1016/j.scriptamat.2020.05.008

Kong, H. J., Yang, T., Chen, R., Yue, S. Q., Zhang, T. L., Cao, B. X., Wang, C., Liu, W. H., Luan, J. H., Jiao, Z. B., Zhou, B. W., Meng, L. G., Wang, A., & Liu, C. T. (2020). Breaking the strength-ductility paradox in advanced nanostructured Fe-based alloys through combined Cu and Mn additions. Scripta Materialia, 186, 213-218. https://doi.org/10.1016/j.scriptamat.2020.05.008

Kong HJ , Yang T, Chen R, Yue SQ, Zhang TL , Cao BX et al. Breaking the strength-ductility paradox in advanced nanostructured Fe-based alloys through combined Cu and Mn additions. Scripta Materialia. 2020 Sep;186:213-218. https://doi.org/10.1016/j.scriptamat.2020.05.008

Kong, H.J. ; Yang, T. ; Chen, R. ; Yue, S.Q. ; Zhang, T.L. ; Cao, B.X. ; Wang, C. ; Liu, W.H. ; Luan, J.H. ; Jiao, Z.B. ; Zhou, B.W. ; Meng, L.G. ; Wang, A. ; Liu, C.T. / Breaking the strength-ductility paradox in advanced nanostructured Fe-based alloys through combined Cu and Mn additions. In: Scripta Materialia. 2020 ; Vol. 186. pp. 213-218.