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Hot Isostatic Pressing of GH4099 Alloy Powders and Preparation of Thin-walled Cylinders |
YIN Yifeng1,2, LU Zhengguan1, XU Lei1, WU Jie1( ) |
1 Shi -changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China 2 School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110116, China |
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Cite this article:
YIN Yifeng, LU Zhengguan, XU Lei, WU Jie. Hot Isostatic Pressing of GH4099 Alloy Powders and Preparation of Thin-walled Cylinders. Chinese Journal of Materials Research, 2024, 38(9): 669-679.
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Abstract Two pre-powders of GH4099 alloy were prepared via techniques of plasma rotating electrode process (PREP) and electrode induction melting gas atomization (EIGA) respectively. Then, the powders were subjected to hot isostatic pressing (HIP) to prepare bulk GH4099 alloy (PM GH4099 alloy), and the effect of HIP temperature on the microstructure and tensile properties of PM GH4099 alloy was investigated. The results show that in comparison with EIGA process, the GH4099 powder prepared by PREP process has better powder sphericity with thinner surface oxide scale, which is more suitable for hot isostatic pressing preparation of workpiece of PM GH4099 alloys. With the increasing HIP temperature within the range of 1165oC~1230oC, the porosity and prior particle boundaries (PPBs) of the acquired PM GH4099 alloy decreases significantly, therewith, the corresponding tensile properties at 900oC were improved. Finally, with the help of finite element modeling (FEM) to assist the envelope design and make, and finally thin-walled cylinders of PM GH4099 were successfully fabricated with the PREP powder via HIP at 1230oC/150 MPa/4 h. The FEM predicted dimensional shrinkages are consistent with that of the actual made thin-walled cylinders of PM GH4099, and the deviation between the corresponding key dimensions is less than 5%.
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Received: 19 October 2023
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Fund: CAS Project for Young Scientists in Basic Research(YSBR-025);National Science and Technology Major Project of China(J2019-VⅡ-0005-0145) |
Corresponding Authors:
WU Jie, Tel: (024)83978843, E-mail: jwu10s@imr.ac.cn
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