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Materials 2015, 8(6), 3701-3713; doi:10.3390/ma8063701

Mechanism of Filling and Feeding of Thin-Walled Structures during Gravity Casting

1
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
2
Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China
3
Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Shanghai 215600, China
4
School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China
5
University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China
6
School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Daolun Chen
Received: 19 May 2015 / Revised: 4 June 2015 / Accepted: 16 June 2015 / Published: 19 June 2015
(This article belongs to the Section Manufacturing Processes and Systems)
View Full-Text   |   Download PDF [4314 KB, uploaded 19 June 2015]   |  

Abstract

The filling and feeding of thin-walled structures in metal castings pose significant difficulties in manufacturing aerospace structural materials. Samples containing 2 mm and 5 mm thin-walled structures were designed to study the kinetics of filling. The microstructural evolution of the solidification of thin-walled structures was studied with synchrotron X-radiation imaging. The formation of dendritic networks and the isotherm profiles of samples of different thickness were examined. The experimental results showed solidification microstructures of 2 mm and 5 mm thin-walled parts containing elongated equiaxed grains and normal equiaxed grains, respectively. The filling and feeding abilities of thin-walled parts were found to depend more on the wall thickness than on the pouring temperature. View Full-Text
Keywords: aluminum alloys; thin-walled effect; solidification microstructure; casting aluminum alloys; thin-walled effect; solidification microstructure; casting
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Li, F.; Zhang, J.; Bian, F.; Fu, Y.; Xue, Y.; Yin, F.; Xie, Y.; Xu, Y.; Sun, B. Mechanism of Filling and Feeding of Thin-Walled Structures during Gravity Casting. Materials 2015, 8, 3701-3713.

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