Gutta, B and Huilgol, P and Perugu, CS and Kumar, G and Reddy, ST and Toth, LS and Bouaziz, O and Kailas, SV (2024) A Polymer-Based Metallurgical Route to Produce Aluminum Metal-Matrix Composite with High Strength and Ductility. In: Materials, 17 (1).
|
PDF
mat_17_1_2024.pdf - Published Version Download (6MB) | Preview |
Abstract
In this investigation, an attempt was made to develop a new high-strength and high-ductility aluminum metal�matrix composite. It was achieved by incorporating ceramic reinforcement into the metal which was formed in situ from a polymer by pyrolysis. A crosslinked PMHS polymer was introduced into commercially pure aluminum via friction stir processing (FSP). The distributed micro- and nano-sized polymer was then converted into ceramic particles by heating at 500 °C for 10 h and processed again via FSP. The produced composite showed a 2.5-fold increase in yield strength (to 119 MPa from 48 MPa) and 3.5-fold increase in tensile strength (to 286 MPa from 82 MPa) with respect to the base metal. The ductility was marginally reduced from 40 to 30. The increase in strength is attributed to the grain refinement and the larger ceramic particles. High-temperature grain stability was obtained, with minimal loss to mechanical properties, up to 500 °C due to the Zenner pinning effect of the nano-sized ceramic particles at the grain boundaries. Fractures took place throughout the matrix up to 300 °C. Above 300 °C, the interfacial bonding between the particle and matrix became weak, and fractures took place at the particle�matrix interface. © 2023 by the authors.
| Item Type: | Journal Article |
|---|---|
| Publication: | Materials |
| Publisher: | Multidisciplinary Digital Publishing Institute (MDPI) |
| Additional Information: | The copyright for this article belongs to Author. |
| Keywords: | Ductility; Friction stir welding; Grain boundaries; Grain refinement; Metallic matrix composites; Polymer matrix composites; Tensile strength, Aluminum metal matrix composites; Ceramics particles; Friction stir processing; Grain stability; High-strength; Matrix composite; Metal matrix; Metal�matrix composite; Nano sized; Polymer-derived ceramics, Aluminum |
| Department/Centre: | Division of Mechanical Sciences > Mechanical Engineering Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 01 Mar 2024 09:10 |
| Last Modified: | 01 Mar 2024 09:10 |
| URI: | https://eprints.iisc.ac.in/id/eprint/83989 |
Actions (login required)
 |
View Item |
