Abstract
In order to develop a light weight piston for an automobile engine, aluminum borate whisker reinforced AZ91D magnesium alloy composites were fabricated by a semi-solid material process using squeeze casting. By controlling the solid fraction, fs, and the rate of the infiltration into the preform, we succeeded in reinforcing a part of the cast alloy without deformation of the preform. The tensile strength of the alloy/composites interface fabricated by semi-solid (50% fs, solid fraction in the semi-solid slurry) process was 120 MPa, and it was equal to the strength by conventional 0% fs process. However, the flexural strength of the composite by the 50% fs process was about 10% lower than the strength of that from the 0% fs process, 498 MPa. After solid solution and aging treatment, the bending strength of the composites in both 0% and 50% fs process was decreased. This might be caused by the notch effect of Mg2Si compound produced between SiO2 binder of the preform and magnesium during heat treatment.
Original language | English |
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Pages (from-to) | 255-263 |
Number of pages | 9 |
Journal | Advanced Composite Materials: The Official Journal of the Japan Society of Composite Materials |
Volume | 10 |
Issue number | 2-3 |
DOIs | |
Publication status | Published - 2001 Jan 1 |
Externally published | Yes |
Keywords
- Metal matrix composites
- Semi-solid
- Squeeze casting
ASJC Scopus subject areas
- Ceramics and Composites
- Mechanics of Materials
- Mechanical Engineering