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A Comparative Study on Abrasive Wear Behavior of TiB2/Graphite Reinforced Cast and Hot Rolled Al7075-Based Hybrid MMCs
https://orcid.org/http://orcid.org/0000-0002-4734-1027
Among well-known substances for reinforcing, graphite, a softer and well-known material, is a preferred choice due to its thermal properties, lubrication characteristics, lightweight, and chemical stability. Titanium diboride is another common ceramic reinforcing substance with excellent thermal conductance, a higher melting temperature, outstanding rigidity, and exceptional micro-hardness at varying temperatures. The current study investigates the effect of titanium diboride and graphite additives on the wear characteristics of AA7075 aluminum. Stir casting and hot rolling were used to make the composite materials. Using the in situ reaction method, eight percent titanium diboride particles were formed, and four and eight percent graphite particles were added later. The casting composite materials were hot rolled with an 80 percent reduction ratio at 400 °C. Microstructural studies, grain size analyses, and abrasive wear tests were performed on hot rolling and casting matrix alloys and their composite materials. According to microstructural investigations, titanium diboride and graphite reinforcement particles are distributed uniformly, with excellent bonds between the matrices and the reinforcing agents in both the casting and hot rolling conditions. Under the same test conditions, both hot rolling and casting composite materials outperform un-reinforced alloys in terms of abrasive wear resistance. When compared to cast 7075 alloy 5wt% TiB2 and 8wt% Graphite reinforced composite, weight loss was reduced by 35% and 47%, respectively, for cast and hybrid conditions. Scanning electron micrograph was used to investigate into possible wearing mechanisms on worn-out areas.
A Comparative Study on Abrasive Wear Behavior of TiB2/Graphite Reinforced Cast and Hot Rolled Al7075-Based Hybrid MMCs
https://orcid.org/http://orcid.org/0000-0002-4734-1027
Among well-known substances for reinforcing, graphite, a softer and well-known material, is a preferred choice due to its thermal properties, lubrication characteristics, lightweight, and chemical stability. Titanium diboride is another common ceramic reinforcing substance with excellent thermal conductance, a higher melting temperature, outstanding rigidity, and exceptional micro-hardness at varying temperatures. The current study investigates the effect of titanium diboride and graphite additives on the wear characteristics of AA7075 aluminum. Stir casting and hot rolling were used to make the composite materials. Using the in situ reaction method, eight percent titanium diboride particles were formed, and four and eight percent graphite particles were added later. The casting composite materials were hot rolled with an 80 percent reduction ratio at 400 °C. Microstructural studies, grain size analyses, and abrasive wear tests were performed on hot rolling and casting matrix alloys and their composite materials. According to microstructural investigations, titanium diboride and graphite reinforcement particles are distributed uniformly, with excellent bonds between the matrices and the reinforcing agents in both the casting and hot rolling conditions. Under the same test conditions, both hot rolling and casting composite materials outperform un-reinforced alloys in terms of abrasive wear resistance. When compared to cast 7075 alloy 5wt% TiB2 and 8wt% Graphite reinforced composite, weight loss was reduced by 35% and 47%, respectively, for cast and hybrid conditions. Scanning electron micrograph was used to investigate into possible wearing mechanisms on worn-out areas.
A Comparative Study on Abrasive Wear Behavior of TiB2/Graphite Reinforced Cast and Hot Rolled Al7075-Based Hybrid MMCs
https://orcid.org/http://orcid.org/0000-0002-4734-1027
Among well-known substances for reinforcing, graphite, a softer and well-known material, is a preferred choice due to its thermal properties, lubrication characteristics, lightweight, and chemical stability. Titanium diboride is another common ceramic reinforcing substance with excellent thermal conductance, a higher melting temperature, outstanding rigidity, and exceptional micro-hardness at varying temperatures. The current study investigates the effect of titanium diboride and graphite additives on the wear characteristics of AA7075 aluminum. Stir casting and hot rolling were used to make the composite materials. Using the in situ reaction method, eight percent titanium diboride particles were formed, and four and eight percent graphite particles were added later. The casting composite materials were hot rolled with an 80 percent reduction ratio at 400 °C. Microstructural studies, grain size analyses, and abrasive wear tests were performed on hot rolling and casting matrix alloys and their composite materials. According to microstructural investigations, titanium diboride and graphite reinforcement particles are distributed uniformly, with excellent bonds between the matrices and the reinforcing agents in both the casting and hot rolling conditions. Under the same test conditions, both hot rolling and casting composite materials outperform un-reinforced alloys in terms of abrasive wear resistance. When compared to cast 7075 alloy 5wt% TiB2 and 8wt% Graphite reinforced composite, weight loss was reduced by 35% and 47%, respectively, for cast and hybrid conditions. Scanning electron micrograph was used to investigate into possible wearing mechanisms on worn-out areas.
A Comparative Study on Abrasive Wear Behavior of TiB2/Graphite Reinforced Cast and Hot Rolled Al7075-Based Hybrid MMCs
J. Inst. Eng. India Ser. D
Ahmed, R M Shabbir (author) / Nagaraj, Banakara (author) / Kumar, N Kiran (author) / Kumar, S G Sujith (author) / Gajakosh, Amithkumar (author)
Journal of The Institution of Engineers (India): Series D ; 105 ; 597-613
2024-08-01
17 pages
Article (Journal)
Electronic Resource
English
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