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Fabrication, Interlayer Bonding and Mechanical Characterization of Four Layered AA7075/SiC Functionally Graded Material

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Abstract

Functionally graded materials are a special class of materials where properties are tailored by varying the composition within a material. Current work investigates the manufacturing feasibility, physical and mechanical properties of SiC-reinforced AA7075 matrix FGM produced using conventional powder metallurgy. FGM developed consists of four (0–5-10–15 wt.% SiC) layers. The powders were mixed uniformly using a ball milling machine. The powders were staked into the day layer by layer and compacted to a pressure of 300 MPa. The FGM was sintered at a temperature of 5800C for 1 h in an inert atmosphere. The morphological analysis confirms the absence of cracks formed in the layer transition regions of the FGM. A relatively uniform distribution of SiC was observed in the layers with a high reinforcement percentage (wt. 15%) compared to other layers. The highest hardness of 71 HRB in the fourth layer of the four-layered FGM containing 15Wt.%SiC is mainly because of influencing the load carrying between the matrix particles and controlling the inhibit dislocation movement. An impact strength of 61 kJ/m2 is observed in the four-layered FGM because of the uniform distribution of SiC and the absence of crack formation among and within the layers.

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Authors and Affiliations

  1. Mechanical Engineering Department, GITAM School of Technology, Hyderabad, 502329, Telangana, India

    Mulugundam Siva Surya

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  1. Mulugundam Siva Surya
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Mulugundam Siva Surya: Conceptualization, Methodology, Experimentation, Result Analysis, Writing- Original draft preparation.

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Correspondence to Mulugundam Siva Surya.

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Surya, M.S. Fabrication, Interlayer Bonding and Mechanical Characterization of Four Layered AA7075/SiC Functionally Graded Material. Silicon 15, 4521–4528 (2023). https://doi.org/10.1007/s12633-023-02379-6

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  • DOI: https://doi.org/10.1007/s12633-023-02379-6

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