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Journals / Bor Dergisi / 2025 / Cilt: 11 Sayı: BORON 2025 Özel Sayı

Experimental Investigation and Taguchi Optimization of the Tribological Properties of Boron Carbide Reinforced Aluminum Matrix Composites

Bor Karbür Takviyeli Alüminyum Matrisli Kompozitlerin Tribolojik Özelliklerinin Deneysel Olarak İncelenmesi ve Taguchi Yöntemi ile Optimizasyonu

Musa Yılmaz(YOZGAT BOZOK ÜNİVERSİTESİ)0000-0002-3912-5607
Mürsel Ekrem(NECMETTİN ERBAKAN ÜNİVERSİTESİ, MÜHENDİSLİK VE MİMARLIK FAKÜLTESİ)0000-0001-5324-7929
Pages
1–11
Publication Date
2026-09-08
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AI Summary & Key Takeaways

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⚡ TL;DR(Too Long; Didn't Read)

The test results showed that the increasing load increased mass loss in accordance with Archard's Law but significantly reduced the average coefficient of friction (COF).

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, the tribological performance of A7075 aluminum matrix composites reinforced with 5% B4C was investigated using the dry pin-on-disk method in accordance with the ASTM G99 standard.
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Key Findings & Data:The effect of three different loads (10, 20, 30 N) and three different sliding speeds (1, 1.5, 2 m/s) on wear behavior was evaluated at a constant friction distance of 2500 m.
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Conclusion & Impact:The test results showed that the increasing load increased mass loss in accordance with Archard's Law but significantly reduced the average coefficient of friction (COF).
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Aşınma · Bor Karbür · Hibrit Kompozit

Abstract

In this study, the tribological performance of A7075 aluminum matrix composites reinforced with 5% B4C was investigated using the dry pin-on-disk method in accordance with the ASTM G99 standard. The effect of three different loads (10, 20, 30 N) and three different sliding speeds (1, 1.5, 2 m/s) on wear behavior was evaluated at a constant friction distance of 2500 m. Taguchi S/N ratio analysis was used to determine the relative effects of the parameters and the optimal conditions. The analysis results revealed that the most effective factor on both mass loss and friction coefficient was the applied load, while the effect of sliding speed remained secondary. The test results showed that the increasing load increased mass loss in accordance with Archard's Law but significantly reduced the average coefficient of friction (COF). This decrease in COF has been attributed to the protective tribo-film formed by the effects of increased load and surface temperature. This film reduced metallic contact and lowered friction by creating a solid lubricant effect. However, the fluctuations observed in the COF curves indicate that this film is not fully stable and continuously forms and breaks down during wear. The effect of sliding speed was not linear; specifically, under high load (30 N) and medium speed (1.5 m/s) conditions, the mass loss decreased compared to low speed (1 m/s) (39 mg vs. 33 mg), indicating that the protective layer became more effective under certain conditions. According to the optimization results, the most suitable values were determined to be 10 N for minimum wear and 30 N for minimum friction coefficient. The prediction accuracy of the developed statistical models was found to be high for COF (82.97%) and relatively low for mass loss (35.19%). This indicates that mass loss is strongly influenced by complex, nonlinear mechanisms such as tribo-film formation and thermal softening.

Özet

Bu çalışmada, %5 bor karbür (B₄C) ile takviye edilmiş A7075 alüminyum matris kompozitlerin tribolojik performansı, ASTM G99 standardına uygun olarak kuru pim-disk yöntemi kullanılarak incelenmiştir. Üç farklı yük (10, 20, 30 N) ve üç farklı kayma hızının (1, 1,5, 2 m/s) aşınma davranışına etkisi, 2500 m'lik sabit bir sürtünme mesafesinde değerlendirilmiştir. Taguchi S/N oranı analizi, parametrelerin göreceli etkilerini ve optimum koşulları belirlemek için kullanılmıştır. Analiz sonuçları, kütle kaybı ve sürtünme katsayısı üzerinde en etkili faktörün uygulanan yük olduğunu, kayma hızının etkisinin ise ikincil kaldığını ortaya koymuştur. Test sonuçları, artan yükün Archard Yasası'na uygun olarak kütle kaybını artırdığını, ancak ortalama sürtünme katsayısını (COF) önemli ölçüde azalttığını göstermiştir. COF'daki bu azalma, artan yük ve yüzey sıcaklığının etkileriyle oluşan koruyucu tribo-film ile ilişkilendirilmiştir. Bu film, katı yağlayıcı etkisi oluşturarak metalik teması azaltmış ve sürtünmeyi düşürmüştür. Ancak, COF eğrilerinde gözlemlenen dalgalanmalar, bu filmin tamamen kararlı olmadığını ve aşınma sırasında sürekli olarak oluştuğunu ve bozulduğunu göstermektedir. Kayma hızının etkisi ise doğrusal olmayıp özellikle, yüksek yük (30 N) ve orta hız (1,5 m/s) koşullarında, kütle kaybı düşük hıza (1 m/s) kıyasla azalmıştır (39 mg'a karşı 33 mg). Bu durumda koruyucu tabakanın belirli koşullar altında daha etkili hale geldiğini göstermektedir. Optimizasyon sonuçlarına göre, minimum aşınma için en uygun değerlerin 10N ve minimum sürtünme katsayısı için 30 N olduğu belirlenmiştir. Geliştirilen istatistiksel modellerin tahmin doğruluğunun COF için yüksek (82,97%), kütle kaybı için ise nispeten düşük (35,19%) olduğu bulunmuştur. Bu, kütle kaybının tribo-film oluşumu ve termal yumuşama gibi karmaşık, doğrusal olmayan mekanizmalardan güçlü bir şekilde etkilendiğini göstermektedir.

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Cite This Article

Yılmaz, M., Ekrem, M. (2026). Experimental Investigation and Taguchi Optimization of the Tribological Properties of Boron Carbide Reinforced Aluminum Matrix Composites. Bor Dergisi, Cilt: 11 Sayı: BORON 2025 Özel Sayı, 1–11. https://doi.org/10.30728/boron.1843956

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