Purpose This paper aims to investigate the effect of fly ash reinforcement ratio (Rr) and sintering temperature (T) on the transverse rupture strength (TRS), hardness and density of fly ash reinforced bronze-based composite materials by using multi-objective Taguchi technique, analysis of variance (ANOVA) and regression analysis. Design/methodology/approach The bronze-based composite materials containing 5, 10 and 15 Wt.% fly ashes were prepared by using spark plasma sintering carried out under a pressure of 35 MPa, at 750, 800 and 850 °C for 3 min. Sintering temperature and fly ash reinforcement ratio were considered as input parameters; the TRS, hardness and density were considered as output parameters. Experiments were designed according to Taguchi L9 orthogonal array. Multi signal-to-noise ratio (MSNR) was computed to define the optimal process parameters. ANOVA was conducted to detect the importance of the input parameters for the process performance. Moreover, the linear model was developed for predicting the performance parameters by using regression analysis. Findings Fly ash can be a good alternative as reinforcement to reduce the cost for composite materials. Optimal process parameters had obtained 850°C sintering temperature and 5 per cent reinforcement ratio by using multi-objective Taguchi technique. The per cent contributions of the control factors on the performance parameters had obtained sintering temperature (95.78 per cent) and fly ash reinforcement ratio (3.00 per cent) with ANOVA. The obtained results indicate that the sintering temperature was found to be the dominant factor among controllable factors. However, the reinforcement ratio showed an insignificant effect. Originality/value It has been indicated that multi-objective Taguchi technique and regression analysis are effective and powerful tools in modeling and simultaneous optimization of quality characteristics for composite materials.
Purpose – The purpose of this paper is to investigate the effect of fly ash content on the friction–wear performance of bronze-based brake lining material. Design/methodology/approach – In this study, bronze-based brake linings containing 0-12 weight per cent fly ash were produced by the hot-pressing process. The friction-wear properties of the unreinforced bronze matrix brake lining material and fly ash reinforced samples were investigated using a Chase-type friction tester. The hardness and density of the samples were also determined. The microstructures and friction surfaces of the samples were examined using scanning electron microscopy. Findings – The experimental results showed that the fly ash content significantly affects the friction-wear properties of the brake lining material. It was found that the friction coefficient increases with the increase in the fly ash content for the brake lining materials studied. Moreover, the mass losses in the wear test were lower for the brake linings containing over 4 weight per cent fly ash than unreinforced bronze-based lining material. Originality/value – This study has proven to be useful in exploring fly ash particles as low cost reinforcing materials in improving the friction–wear performance of bronze-based brake lining material. In addition, the use of fly ash particles in the manufacture of brake lining materials contributes to reducing the production cost of brake linings and to a sustainable environment.
Kütlece %5, 10 ve 15 uçucu kül içeren bronz matrisli kompozit malzemeler 750, 800, 850°C sıcaklıklarda spark plazma sinterleme yöntemi kullanılarak üretilmiştir. Kontrol faktörleri olarak uçucu kül takviye oranı ve sıcaklık, proses parametresi olarak ise üç nokta eğme mukavemeti seçilmiştir. Deneyler, Taguchi L 9 ortogonal dizisine göre tasarlanmıştır. Optimum proses parametrelerini belirlemek için sinyal/gürültü oranı hesaplanmıştır. ANOVA ile kontrol faktörlerinin proses performansı üzerindeki etki seviyeleri tespit edilmiştir. Ayrıca, performans parametrelerini regresyon analizi ile tahmin etmek için lineer ve kuadratik regresyon denklemleri geliştirilmiştir. Sonuç olarak, yapılan Taguchi analizi sonucu; %5 uçucu kül takviye oranı, 850°C sinterleme sıcaklığında üç nokta eğme mukavemet değerleri en iyi sonucu verdiği görülmüştür. Elde edilen sonuçlar, kontrol edilebilen faktörler arasında sinterleme sıcaklığının en etkili faktör olduğu ve bununla birlikte, uçucu kül takviye oranının etkisinin önemsiz olduğunu göstermiştir.
In this study, bronze-based brake linings containing 0-8 wt% glass powder were manufactured by a hot pressing process and tribological properties of produced samples were investigated using a Chase-type friction tester. The hardness and density of the samples were also determined. The microstructures and friction surfaces of the samples were examined using scanning electron microscopy (SEM). As a result, it was dermined that the sample that was reinforced with 8 wt% glass powder has exhibited the best wear behavior. Furthermore, a reduction in the friction coefficient of all the samples with increasing friction surface temperature was observed. The results have showed that friction coefficient stability of the brake lining samples could be improved with the increasing content of glass powder.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.