Precipitation kinetics and mechanical properties of nanostructured steels with Mo additions

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

doi:10.1080/21663831.2020.1734976

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Precipitation kinetics and mechanical properties of nanostructured steels with Mo additions

Original Report | 更新时间：2026-08-19

- Precipitation kinetics and mechanical properties of nanostructured steels with Mo additions
- Materials Research Letters Vol. 8, Issue 5, Pages: 187-194(2020)
- 作者机构：
  
  1. Key Laboratory of Superlight Materials and Surface Technology Ministry of Education College of Materials Science and Chemical Engineering Harbin Engineering University
  2. Department of Materials Science Engineering College of Science and Engineering City University of Hong Kong
  3. Department of Mechanical Engineering The Hong Kong Polytechnic University
  4. Key Laboratory of Superlight Materials and Surface Technology Ministry of Education College of Materials Science and Chemical Engineering Harbin Engineering University Harbin People’s Republic of China
  5. Iron & Steel Research Institute of Ansteel Group Corporation
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2020.1734976
  CLC：
- Online First：02 March 2020，
  
  Published：2020
- 稿件说明：
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S. S. Xu, Y. W. Liu, Y. Zhang, et al. Precipitation kinetics and mechanical properties of nanostructured steels with Mo additions[J]. Materials Research Letters, 2020, 8(5): 187-194.
DOI：

S. S. Xu, Y. W. Liu, Y. Zhang, et al. Precipitation kinetics and mechanical properties of nanostructured steels with Mo additions[J]. Materials Research Letters, 2020, 8(5): 187-194. DOI： 10.1080/21663831.2020.1734976.

摘要

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.

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