Cyclic quenching treatment doubles the Charpy V-notch impact energy of a 2.3 GPa maraging steel

Journal article (2025)

Authors

Xinlei Zhou University of Science and Technology of China, Chinese Academy of Sciences

Peng Mi China Aerodynamics Research and Development Center

Honglin Zhang Chinese Academy of Sciences

W. Yan Novel Aerospace Materials - Aerospace Engineering , Shi-changxu Innovation Center for Advanced Materials, Chinese Academy of Sciences

Wei Wang Chinese Academy of Sciences, Shi-changxu Innovation Center for Advanced Materials

Mingyue Sun Chinese Academy of Sciences

S. van der Zwaag Group Garcia Espallargas - Aerospace Engineering

Lijian Rong Chinese Academy of Sciences

Research Group

Group Garcia Espallargas (Aerospace Engineering) (TU Delft)

Austenite Toughness Maraging steel Cyclic quenching treatment Ni partitioning Ultrafine lath

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Published Date

2025

Language

English

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Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Research Group

Group Garcia Espallargas

Abstract

A cyclic quenching treatment (CQT) succeeded in turning a 2.3 GPa maraging steel with a Charpy impact energy of 9 J into a new grade with the same strength but a Charpy impact energy of 20 J upon 4 cyclic treatments. The improvement of mechanical properties is attributed to the refinement and increased chemical heterogeneity of the martensitic substructure, rather than the refinement of prior austenite grain (PAG), as well as the Transformation-Induced Plasticity (TRIP) effect facilitated by small austenite grains. The role of local segregation of Ni during CQT in the formation of Ni-rich austenite grains, Ni-rich martensite laths and Ni-poor martensite laths, was investigated and verified by DICTRA simulations. This study highlights the important influence of Ni partitioning behavior during CQT, providing insights into microstructural evolution and mechanical properties.

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