Heng-san Liu, Lin Zhang, Xin-bo He, Xuan-hui Qu, Hong-min Zhu, and Guo-qing Zhang, Effect of oxygen content and heat treatment on carbide precipitation behavior in PM Ni-base superalloys, Int. J. Miner. Metall. Mater., 19(2012), No. 9, pp. 827-835. https://doi.org/10.1007/s12613-012-0635-x
Cite this article as:
Heng-san Liu, Lin Zhang, Xin-bo He, Xuan-hui Qu, Hong-min Zhu, and Guo-qing Zhang, Effect of oxygen content and heat treatment on carbide precipitation behavior in PM Ni-base superalloys, Int. J. Miner. Metall. Mater., 19(2012), No. 9, pp. 827-835. https://doi.org/10.1007/s12613-012-0635-x
Heng-san Liu, Lin Zhang, Xin-bo He, Xuan-hui Qu, Hong-min Zhu, and Guo-qing Zhang, Effect of oxygen content and heat treatment on carbide precipitation behavior in PM Ni-base superalloys, Int. J. Miner. Metall. Mater., 19(2012), No. 9, pp. 827-835. https://doi.org/10.1007/s12613-012-0635-x
Citation:
Heng-san Liu, Lin Zhang, Xin-bo He, Xuan-hui Qu, Hong-min Zhu, and Guo-qing Zhang, Effect of oxygen content and heat treatment on carbide precipitation behavior in PM Ni-base superalloys, Int. J. Miner. Metall. Mater., 19(2012), No. 9, pp. 827-835. https://doi.org/10.1007/s12613-012-0635-x
State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing 100083, China
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
National Key Lab of High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, Beijing 100095, China
The influence of oxygen content and heat treatment on the evolution of carbides in a powder metallurgy (PM) Ni-base superalloy was characterized. The results reveal that oxygen content has little influence on the precipitation of carbides inside the particles. However, under the consolidated state, stable Ti oxides on the particle surface act as nuclei for the precipitation of prior particle boundaries (PPB). Also, oxygen can diffuse internally along grain boundaries under compressive stress, which favors the precipitation of carbides inside the particles. Therefore, a higher amount of carbides will appear with more oxygen content in the case of consolidated alloys. It is also observed that PPB can be disrupted into discontinuous particles at 1200℃, but this carbide network is hard to be eliminated completely. The combined MC-M23C6 morphology approves the nucleation and growth mechanism of carbide evolution.
State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing 100083, China
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
National Key Lab of High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, Beijing 100095, China
The influence of oxygen content and heat treatment on the evolution of carbides in a powder metallurgy (PM) Ni-base superalloy was characterized. The results reveal that oxygen content has little influence on the precipitation of carbides inside the particles. However, under the consolidated state, stable Ti oxides on the particle surface act as nuclei for the precipitation of prior particle boundaries (PPB). Also, oxygen can diffuse internally along grain boundaries under compressive stress, which favors the precipitation of carbides inside the particles. Therefore, a higher amount of carbides will appear with more oxygen content in the case of consolidated alloys. It is also observed that PPB can be disrupted into discontinuous particles at 1200℃, but this carbide network is hard to be eliminated completely. The combined MC-M23C6 morphology approves the nucleation and growth mechanism of carbide evolution.
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