Simultaneous Increase of Both Strength and Ductility of Medium Mn Transformation-Induced Plasticity Steel by Vanadium Alloying

Communication
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Abstract

In general, microalloying such as vanadium (V) is considered to deteriorate the mechanical stability of austenite grains in medium Mn steel due to the consumption of C content. In this paper, we show that the mechanical stability of austenite grains could be optimized by V-alloying. This is because the V-alloying will refine the austenite grain size and tends to stabilize the austenite grains. The competition between the grain refinement and the reduced C content results in proper mechanical stability of austenite grains, providing continuous transformation-induced plasticity (TRIP) effect. In addition, the V-alloying suppresses the formation of intergranular cracks, leading to a ductile fracture morphology and a large non-uniform elongation.

Notes

M.X. Huang acknowledges the financial support from the Research Grants Council of Hong Kong (Nos. HKU719712E, HKU712713E, 17203014) and National Science Foundation of China (No. 51301148).

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2018

Authors and Affiliations

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

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