Uncovering the mechanism of dislocation interaction with nanoscale (<4 nm) interphase precipitates in microalloyed ferritic steels

Elena Pereloma; David Cortie; Navjeet Singh; Gilberto Casillas; Frank Niessen

doi:10.1080/21663831.2020.1764121

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Uncovering the mechanism of dislocation interaction with nanoscale (<4 nm) interphase precipitates in microalloyed ferritic steels

Reports | 更新时间：2026-08-19

- Uncovering the mechanism of dislocation interaction with nanoscale (<4 nm) interphase precipitates in microalloyed ferritic steels
- Materials Research Letters Vol. 8, Issue 9, Pages: 341-347(2020)
- 作者机构：
  
  1. ARC Research Hub for Australian Steel Manufacturing University of Wollongong Wollongong NSW Australia
  2. Institute for Superconducting and Electronic Materials Australian Institute for Innovative Materials University of Wollongong Wollongong
  3. ARC Research Hub for Australian Steel Manufacturing University of Wollongong Wollongong
  4. Electron Microscopy Centre University of Wollongong Wollongong
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2020.1764121
  CLC：
- Online First：19 May 2020，
  
  Published：2020
- 稿件说明：
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Elena Pereloma, David Cortie, Navjeet Singh, et al. Uncovering the mechanism of dislocation interaction with nanoscale (<4 nm) interphase precipitates in microalloyed ferritic steels[J]. Materials Research Letters, 2020, 8(9): 341-347.
DOI：

Elena Pereloma, David Cortie, Navjeet Singh, et al. Uncovering the mechanism of dislocation interaction with nanoscale (<4 nm) interphase precipitates in microalloyed ferritic steels[J]. Materials Research Letters, 2020, 8(9): 341-347. DOI： 10.1080/21663831.2020.1764121.

摘要

Abstract

BSTRACTNanoscale interphase precipitation in microalloyed ferritic steels provides a remarkable (200–400 MPa) strengthening increment

however its origin is unclear. Scanning transmission electron microscopy revealed step formation at the matrix/precipitate interface after both macroscopic uniaxial tension and nanopillar compression testing. Supported by Density Functional Theory modelling

dislocation shearing of nano-sized (4 nm) VC precipitates was identified as a strengthening mechanism. The findings suggest the operation of an unusual {001}110 slip–system in the VC nanoparticles.

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