Precipitation kinetics and mechanical properties of nanostructured steels with Mo additions

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • S. S. Xu
  • Y. W. Liu
  • Y. Zhang
  • J. H. Luan
  • J. P. Li
  • L. X. Sun
  • Z. B. Jiao
  • Z. W. Zhang

Detail(s)

Original languageEnglish
Pages (from-to)187-194
Journal / PublicationMaterials Research Letters
Volume8
Issue number5
Online published2 Mar 2020
Publication statusPublished - 2020

Link(s)

Abstract

It is known that nanoscale precipitates strongly affect the precipitation hardening of structural materials. In this study, we report the precipitation kinetics and thermostability of Cu-rich and NiAl nanoprecipitates in nanostructured steels with Mo additions. Atom probe tomography and first-principles calculations revealed that the addition of Mo effectively decreased the diffusion coefficients of Cu, Ni and Al atoms, leading to the change in the precipitation mechanisms from NiAl prior-precipitation with an instantaneous-nucleation mechanism to the Cu prior-precipitation with a continuous-nucleation mechanism. The decreased diffusion coefficient significantly improves the thermostability of nanoprecipitates and strongly enhances the strength of the nanostructured steels.

Research Area(s)

  • Mo additions, Nanoprecipitates, nanostructured steels, precipitation mechanisms, thermostability

Citation Format(s)

Precipitation kinetics and mechanical properties of nanostructured steels with Mo additions. / Xu, S. S.; Liu, Y. W.; Zhang, Y. et al.
In: Materials Research Letters, Vol. 8, No. 5, 2020, p. 187-194.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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