Microstructure and properties of 35 kg large aluminum alloy flywheel housing components formed by squeeze casting with local pressure compensation
Time：2026-01-27 Hits：1815
Title: Microstructure and properties of 35 kg large aluminum alloy flywheel housing components formed by squeeze casting with local pressure compensation
DOI: https://doi.org/10.1007/s41230-024-4061-2
Author: *Ju-fu Jiang1, Jing Yan1, Ying-ze Liu1, Ning Ge1, **Ying Wang2, Chang-jie Ding3, and De-chao Zou3
*Ju-fu Jiang
Born in 1976, Ph. D., Professor, Doctoral Supervisor, National High-end Talent. Executive Committee member of the International Scientific Committee on Semi-solid Processing of Alloys and Composites. To date, he has published 177 academic papers, applied for 43 national invention patents (31 authorized, 2 converted), obtained 1 software copyright, and authored 1 monograph. He has led 7 National Natural Science Foundation projects (including key and joint key projects), 2 National Key R&D Program projects, and 17 sub-projects of a certain national basic strengthening key project. He has received 1 second prize for National Technological Invention and 5 provincial and ministerial awards. His research results provide key technical support for the forming and manufacturing of components in the fields of aerospace, weapons, automobiles, and 5G communication.
E-mail: jiangjufu@hit.edu.cn
Abstract:
The squeeze casting method with local pressure compensation was proposed to form a flywheel housing component with a weight of 35 kg. The numerical simulation, microstructure observation and phase characterization were performed, and the influence of local pressure compensation on feeding of thick-wall position, microstructure and mechanical properties of the formed components were discussed. Results show that the molten metal keeps a good fluidity and the filling is complete during the filling process. Although the solidification at thick-wall positions of the mounting ports is slow, the local pressure compensation effectively realizes the local forced feeding, significantly eliminating the shrinkage cavity defects. In the microstructure of AlSi9Mg alloy, α-Al primarily consists of fragmented dendrites and rosette grains, while eutectic Si predominantly comprises needles and short rods. The impact of local pressure compensation on strength is relatively minimal, yet its influence on elongation is considerable. Following local pressure compensation, the average elongation at the compensated areas is 9.18%, which represents a 44.90% higher than that before compensation. The average tensile strength is 209.1 MPa, and the average yield strength is 100.6 MPa. The local pressure compensation can significantly reduce or even eliminate the internal defects in the 35 kg large-weight components formed by squeeze casting.
Free full text: https://doi.org/10.1007/s41230-024-4061-2
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