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Metallurgical and Materials Transactions A

, Volume 50, Issue 6, pp 2971–2977 | Cite as

Resetting the Austenite Stability in a Medium Mn Steel via Dislocation Engineering

  • B. B. He
  • M. Wang
  • M. X. HuangEmail author
Article
  • 183 Downloads

Abstract

In general, it is very difficult to reset the mechanical stability of retained austenite grains in a given steel grade through the conventional governing factors such as the chemical compositions and grain size. Here we try to resolve this challenge via dislocation engineering. The dislocations are introduced by deformation of a medium Mn steel at a relatively high temperature (~ 300 °C) where the austenite grains are mostly deformed by the dislocation plasticity. These dislocations tend to stabilize the retained austenite grains and therefore reserve a substantial austenite fraction for the transformation-induced plasticity effect at a large strain regime.

Notes

Acknowledgments

M.X. Huang acknowledges the financial support from the National Key Research and Development Program of China (No. 2017YFB0304401), National Natural Science Foundation of China (No. U1764252, U1560204), Research Grants Council of Hong Kong (Nos. 17255016, 17203014, C7025-16G), and Seed Fund for Basic Research of HKU (Nos. 201711159029, 201611159178)

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringThe University of Hong KongHong KongChina
  2. 2.Shenzhen Institute of Research and Innovation, The University of Hong KongShenzhenChina

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