On structure-property relationship in nanostructured bainitic steel subjected 
to the quenching and partitioning process

Luo, Ping; Gao, Guhui; Zhang, Han; Tan, Zhunli; Misra, Rajiv Devesh Kumar; Bai, Bingzhe

doi:10.1016/j.msea.2016.03.006

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On structure-property relationship in nanostructured bainitic steel subjected to the quenching and partitioning process

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Zhang, Han
Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Citation

Luo, P., Gao, G., Zhang, H., Tan, Z., Misra, R. D. K., & Bai, B. (2016). On structure-property relationship in nanostructured bainitic steel subjected to the quenching and partitioning process. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing, 661, 1-8. doi:10.1016/j.msea.2016.03.006.

Cite as: https://hdl.handle.net/21.11116/0000-0001-B93E-A

Abstract

We elucidate here the mechanistic contribution of the application of quenching and partitioning (QP) concept to a high carbon Mn-Si-Cr steel in obtaining a multiphase microstructure comprising of martensite/austenite and nanostructured bainite (bainitic ferrite and nanometer-sized film-like retained austenite) that exhibited tensile strength of 1923 MPa and total elongation of 18.3. The excellent mechanical properties are attributed to the enhanced refinement of blocky austenite islands obtained by the QP process. The austenite was stabilized by both carbon partitioning from martensite and bainite transformation. Compared with conventional heat treatment to produce nanostructured bainite, the total time is significantly reduced without degradation of mechanical properties. © 2016 Elsevier B.V.