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

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

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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

Detail(s)

Original languageEnglish
Pages (from-to)213-218
Journal / PublicationScripta Materialia
Volume186
Online published5 Jun 2020
Publication statusPublished - Sep 2020

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)

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