Abstract
The mechanical property is an important index to evaluate the recovery degree of the internal crack zone. This work presents interfacial characteristics and Charpy impact properties of crack healing zones in SA 508-3 steel, healing by hot compression and different healing treatment methods. When the holding time increased, the hardness of the matrix and crack healing zone decreased. The hardness of the matrix was usually higher than the crack healing zone, but the value of differences decreased with the increasing holding time. The percentage recovery of impact property increased when the holding time increased from 0 to 10 h. After holding for more than 10 h, the impact property decreased due to the mixed crystal structure. With the same total holding time, the recovery rate of crack healing slowed down with the increment of heating times. The results show that for specimens with internal cracks, the method of healing at 950 °C and holding for 10 h was enough for crack healing without sacrificing impact property.
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The authors gratefully acknowledge financial support from the National Natural Foundation of China (51775298).
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© 2020 The Minerals, Metals & Materials Society
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Qiu, Y., Xin, R., Luo, J., Ma, Q. (2020). Effects of Heat Treatment Method on Microstructure and Mechanical Properties of Internal Crack Healing in SA 508-3 Steel. In: Lee, J., Wagstaff, S., Lambotte, G., Allanore, A., Tesfaye, F. (eds) Materials Processing Fundamentals 2020. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-36556-1_5
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DOI: https://doi.org/10.1007/978-3-030-36556-1_5
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