scholarly journals Determination of Braking Speed of Developed Hybrid Particle Reinforced Aluminium Alloy

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Justine O Bucham ◽  
Baba A Aliyu ◽  
Abubakar Muhammad
Keyword(s):  
Silicon Carbide ◽  
Cast Iron ◽  
Aluminium Alloy ◽  
Nodular Cast Iron ◽  
Mechanical Tests ◽  
Coconut Shell ◽  
Brake Disc ◽  
Alloy Sample ◽  
Alloy Matrix ◽  
Coconut Shell Ash

Abstract- This paper is aimed at comparing the braking speed of the developed Composite Brake Disc (CBD) with that of a nodular cast iron Honda Accord (2000) Model Brake Disc (HABD). The test samples were produced from Aluminium alloy (Al6061), Coconut Shell Ash (CSA) and Silicon Carbide (SiC) by Stir casting and machined into standard specimens for microstructure analysis, density test, mechanical tests (hardness, tensile and impact), wear test and thermal test. The characterization of coconut shell ash particle was carried out using X-ray Flourescent equipment. Six samples were produced, four composite samples; C1 (70% Al, 5% SiC, 20% CSA), C2 (70% Al, 10% SiC, 15% CSA), C3 (70% Al, 15% SiC, 10% CSA) and C4 (70% Al, 20% SiC, 5% CSA), aluminium alloy sample (A1) and as-cast nodular cast iron sample (N1) obtained from HABD. Sample ‘C4’ had the best physical, mechanical, wear and thermal properties (Densty: 3.15 g/cm3, Hardness: 68 kg/mm2, Tensile Strength:  196.12 N/mm2, Impact Energy: 8.05 J, Wear rate: 0.0002328 g/m, Thermal Conductivity: 72.57 W/m-K) and was used to produce the CBD. From the values of coefficient of frictions obtained for CBD and HABD, the braking speeds were calculated and HABD was seen to have a lower braking speed (56.65 m/s) than the CBD (94.42 m/s) because of its higher coefficient of friction. The higher braking speed of the composite brake disc (CBD) as compared to the Honda Accord Brake Disc (HABD) could be as a result of inadequate reinforcements in the aluminium alloy matrix. Hence,  the produced CBD cannot be used as an alternative for the nodular cast iron Honda accord brake disc (HABD) even as problems of heavy weight and breakage that may occur due to heavy impact associated with cast iron brake disc have been addressed using the developed composite.Keywords,- Aluminium Alloy, Braking Speed, Coconut Shell, Composite, Silicon Carbide

Tribological behavior of laser textured nodular cast iron surface

2019 ◽  
Vol 71 (7) ◽  
pp. 949-955
Author(s):  
Yongmei Zhu ◽  
Junjie Chen ◽  
Jiajun Du ◽  
Yujie Fan ◽  
Jifei Zheng
Keyword(s):  
Cast Iron ◽  
Tribological Behavior ◽  
Surface Texturing ◽  
Nodular Cast Iron ◽  
Area Ratio ◽  
Brake System ◽  
Resin Matrix ◽  
Dry Sliding ◽  
Brake Disc ◽  
Content Type

Purpose Previous publications were mainly focused on the effect of textures under lubrication. Under dry sliding, area ratio of surface texturing (pit area ratio) and diameter of pit affect the tribological behavior. This paper aims to investigate the effect of laser surface texturing on tribological behavior of nodular cast iron under dry sliding. Design/methodology/approach Pit-like textures with different diameters and spaces were fabricated by laser on nodular cast iron (QT600-3). Using nodular cast iron (QT600-3) as the disc specimen and resin matrix composites (UCV018) as the pad specimen, the tribological test was performed with pin-on-disk reciprocating tribo-tester. Findings The coefficient of friction (COF) of the non-textured specimen was larger than that of the textured one. For the same pit diameter, a larger pit area ratio induced a slight decrease of COF, while wear volume decreased significantly. The pit diameter induced a slight decrease of COF as the pit area ratio, but its effect was weaker. Practical implications The experimental studies will help to improve the brake system such as structure modeling of brake disc. Predicting the performance and life of the brake disc in vehicle based on tribological behavior checked in test, it was proved that pit-like texture had application value in vehicle brake system. Originality/value This paper showed that the effect of pit area ratio on friction and wear was greater than that of pit diameter. The experimental results will be useful to the design on safety brake disc.

Fatigue Properties of Synthetic Nodular Cast Irons

2014 ◽  
Vol 635 ◽  
pp. 5-8 ◽  
Author(s):  
Alan Vaško
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Cast Iron ◽  
Nodular Cast Iron ◽  
Positive Influence ◽  
Fatigue Properties ◽  
Steel Scrap ◽  
Cast Irons ◽  
Metallurgical Silicon ◽  
A Charge

The contribution deals with comparison of microstructure, mechanical properties and fatigue properties of synthetic nodular cast irons with a different ratio of steel scrap in a charge. Chemical composition of individual melts was regulated alternatively by ferrosilicon (FeSi) and carburizer or metallurgical silicon carbide (SiC). The paper shows positive influence of SiC additive on the microstructure, mechanical properties as well as fatigue properties of nodular cast iron. The additive of metallurgical silicon carbide in analysed specimens increases the content of ferrite in the matrix, decreases the size of graphite and increases the average count of graphitic nodules per unit of area. Consequently, the mechanical and fatigue properties of nodular cast iron are improved.

The development of a material model for cast iron that can be used for brake system analysis

2002 ◽  
Vol 216 (5) ◽  
pp. 349-362 ◽  
Author(s):  
S Koetniyom ◽  
P C Brooks ◽  
D C Barton
Keyword(s):  
Finite Element ◽  
Cast Iron ◽  
System Analysis ◽  
Preliminary Investigation ◽  
Material Model ◽  
Mechanical Tests ◽  
Brake Disc ◽  
Tension And Compression ◽  
High Plastic Strain ◽  
Iron Material

This paper describes the methodology and reports the results of detailed thermomechanical finite element analyses of cast iron brake discs under repeated high g braking conditions. The thermal analysis allows for heat loss from the vanes in a back-ventilated disc design as well as heat transfer to other parts of the brake assembly. The cast iron material properties required for the non-linear structural analysis are generated by mechanical tests on samples cut from the brake disc. The material model developed by the authors allows for the variation of flow stress with temperature and for the different yield properties of cast iron in tension and compression. The finite element results, derived from a preliminary investigation, indicate regions of high plastic strain accumulation which may lead to disc crazing and/or cracking and enable comparisons to be made between back- and front-vented rotor designs.

scholarly journals The Potentials of Kyanite Particles and Coconut Shell Ash as Strengthener in Aluminum Alloy Composite for Automobile Brake Disc

2020 ◽  
Vol 08 (03) ◽  
pp. 84-96
Author(s):  
Simon Godenaan Datau ◽  
Mohammed Ahmed Bawa ◽  
Jacob Shekwonudu Jatau ◽  
Muhammad Hamisu Muhammad ◽  
Adekunle Sefiu Bello
Keyword(s):  
Aluminum Alloy ◽  
Coconut Shell ◽  
Brake Disc ◽  
Alloy Composite ◽  
Coconut Shell Ash

Influence of Stress Mode on Failure Micromechanisms of Nodular Cast Iron

2014 ◽  
Vol 693 ◽  
pp. 382-387 ◽  
Author(s):  
Alan Vaško ◽  
Milan Vaško
Keyword(s):  
Cast Iron ◽  
Nodular Cast Iron ◽  
Mechanical Tests ◽  
Fatigue Tests ◽  
Bending Test ◽  
Metallographic Analysis ◽  
Cast Irons ◽  
Fracture Surfaces ◽  
Static Tensile ◽  
Different Content

The paper deals with comparison of the failure micromechanisms of nodular cast iron at static, impact and fatigue stress. Several specimens of ferrite-pearlitic nodular cast irons with different content of ferrite in a matrix were used for metallographic analysis, mechanical tests and microfractographic analysis. Mechanical properties were found out by static tensile test, impact bending test and fatigue tests. The microfractographic analysis was made with use of scanning electron microscope on fracture surfaces of the specimens fractured by these mechanical tests. Fracture surfaces of analysed specimens are characteristic of mixed mode of fracture. Failure micromechanism of nodular cast irons is dependent on mode of stress.

Characterisation of Silicon Carbide and Fly Ash in LM13 Aluminium Alloy Matrix Composites

2016 ◽  
Vol 8 (2) ◽  
Author(s):  
C. Krishnaraj ◽  
P. Divinesh ◽  
O.M. Mohaideen
Keyword(s):  
Silicon Carbide ◽  
Fly Ash ◽  
Aluminium Alloy ◽  
Matrix Composite ◽  
Stir Casting ◽  
Matrix Composites ◽  
Alloy Matrix ◽  
The Matrix ◽  
Materials Used ◽  
Aluminium Alloy Matrix

The modern vehicles demand more thermal and mechanical properties as the speed of the vehicles is increasing. The materials used should be able to not only withstand the high temperatures but to dissipate it at a faster rate without deformation. This paper investigates the characteristics of silicon carbide (SiC) and fly ash in LM13 aluminium alloy matrix composite prepared by stir casting. The LM13 alloy has high thermal property which makes it ideal for making engines and gears. The effect of fly ash and SiC on LM13 and its influence on increasing the surface roughness was analyzed by varying their proportion. The addition of SiC and fly ash to the matrix composite increases the hardness and tensile strength of the composite which is validated by experimental results.

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