Al–Si–Cu–Mg Matrix Composites with Graphene: PM-Based Production, Microstructural, and Mechanical Properties

Berk Şenyurt, Duygu Ağaoğulları, Nazlı Akçamlı*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Few-layered graphene (FLG)-reinforced Al-Si(10 wt%)-Cu(2 wt%)-Mg(1 wt%) matrix composites are prepared by the high-energy mechanical alloying (MA) method, which is a branch of powder metallurgy. Al-10Si-2Cu-1Mg matrix is reinforced with varying amounts of FLG (0, 0.5, 1, 2, and 5 wt%) via MA for different durations (0, 2, 4, and 8 h), and consolidation is conducted by pressureless sintering. Microstructural, mechanical, and tribological characterizations are applied to nonmechanically alloyed (non-MAed) and mechanically alloyed (MAed) powder and bulk composites comparatively. The bulk composites produced via the MA-containing processing route illustrate more homogeneous phase distributions and higher densification rates. The FLG/AlSiCuMg composites exhibit enhanced materials properties compared to their unreinforced counterparts. The addition of 1 and 2 wt% FLG to the Al-10Si-2Cu-1Mg alloy, respectively, improved the mechanical properties in terms of microhardness (155 and 162 HV), compression strength (441 and 412 MPa), and wear rate (11.5 × 10−4 and 9.2 × 10−4 mm3 N−1 m). Therefore, the experimental results show that graphene ensures a reinforcing effect on the Al matrix, at least provided by some of the ceramic particles.

Original languageEnglish
JournalAdvanced Engineering Materials
DOIs
Publication statusAccepted/In press - 2024

Bibliographical note

Publisher Copyright:
© 2024 The Author(s). Advanced Engineering Materials published by Wiley-VCH GmbH.

Keywords

  • Al–Si–Cu–Mg alloy composites
  • few-layered graphene
  • mechanical alloying
  • microstructural/mechanical properties

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