Abstract
Nano-precipitates strengthened steels exhibit excellent combination of high strength, high toughness and good weldability. In this study, the optimized thermomechanical processing and aging treatments are used to control simultaneously the matrix microstructure and nano scale precipitates. It is found that the mechanical properties are significantly influenced by thermomechanical processing. The aging temperature and aging time play a key role to control the strength of steel. XRD results reveal the transformation of phases after aging treatment was investigated. Optical microscope (OM) and scanning electron microscope (SEM) were used characterized microstructure and fracture modes. The effects of aging treatment and thermomechanical processing on the microstructure evolution and mechanical properties are also discussed.
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Acknowledgements
This work was supported by the NSFC Funding (51371062 and U1460102), NSFHLJ (ZD201411), the Scientific Research Foundation for the Returned Overseas Chinese Scholars (Heilongjiang Province), the Project for Innovative Talents of Science and Technology of Harbin (2014RFXXJ006) and the Project of High-Tech Ships of Ministry of Industry and Information Technology of the People’s Republic of China. Yu Zhao is benefited from the International Exchange Program of Harbin Engineering University for Innovation-oriented Talents Cultivation.
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Zhao, Y., Xu, S., Guo, H., Li, J., Zhang, Z.W. (2017). Influences of Thermomechanical Treatments on the Microcstructure Evolution and Mechanical Properties of Nano-precipitates Strengthened Steels. In: TMS, T. (eds) TMS 2017 146th Annual Meeting & Exhibition Supplemental Proceedings. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51493-2_22
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DOI: https://doi.org/10.1007/978-3-319-51493-2_22
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