The Role of Retained Austenite Stability on Low-Temperature Mechanical Behaviors of a Quenching and Partitioning Steel
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Low-temperature deformation and fracture behaviors are studied for a quenching and partitioning (Q&P) steel by interrupted tensile tests and X-ray diffraction (XRD). The austenite stability decreases significantly from 298 K to 223 K, while further cooling to 77 K does not cause greater instability. The yielding, work hardening, and fracture behaviors are found to change under the influence of austenite stability at low temperatures.
M.X. Huang acknowledges the financial support from the National Natural Science Foundation of China (No. U1764252, U1560204), Research Grants Council of Hong Kong (No. 17255016, 17203014), and National Key Research and Development Project of China (No.2017YFB0304401). The authors also acknowledge Dr. Rendong Liu and Dr. Xu Wang of Ansteel for providing the materials.
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