Tribological behaviour of ductile and austempered grey cast iron under dry environment

Akinribide, Ojo Jeremiah; Akinwamide, Samuel Olukayode; Obadele, Babatunde Abiodun; Ogundare, O.; Ayeleru, Olusola Olaitan; Olubambi, Peter Apata

doi:10.1016/j.matpr.2020.07.473

Cited by 10 publications

(6 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is observed that the volume loss increases significantly with increasing sliding distance and load. This result agrees with the results of the studies in the literature [27]. Another parameter studied to determine the effect of tempering heat treatment parameters on the wear resistance of CGI is the coefficient of friction (Figure 7).…”

Section: Resultssupporting

confidence: 90%

A Comparative Investigation on the Wear Performance of Compacted Graphite Iron (CGI) Treated with Single and Double Tempering

Tan

2022

International Journal of Innovative Engineering Applications

View full text Add to dashboard Cite

Original scientific paperCompacted graphite iron (CGI) is a critical material in today's automotive and manufacturing industries. Heat treatment processes can improve CGI wear properties, related primarily to microstructural changes. In this study, single and double tempering heat treatments were carried out to improve the wear properties of CGI. Oil quenching was performed after 90 minutes of austenitization at 900°C, followed by 60 minutes of single and double tempering at three different temperatures (315, 350, and 375°C). The wear performance of the samples was compared using a pin-on disc test and hardness measurements. The volume loss and friction coefficient were evaluated, and wear maps were constructed to determine the samples' wear behavior. SEM and EDS analyses were carried out to worn surfaces to interpret the wear mechanisms. According to the study's findings, double tempering heat treatment may optimize wear performance better than traditional single tempering, and structures with high toughness-wear resistance combinations can be obtained.

show abstract

Section: Resultssupporting

confidence: 90%

A Comparative Investigation on the Wear Performance of Compacted Graphite Iron (CGI) Treated with Single and Double Tempering

Tan

2022

International Journal of Innovative Engineering Applications

View full text Add to dashboard Cite

show abstract

“…The grain size, microhardness, film/substrate adhesion strength, surface roughness, etc., determine the wear performance of ductile iron (DI) and austempered grey cast iron (AGCI). Wear behavior is categorized according to microhardness and the coefficient of friction [51]. The worn surfaces under dry sliding conditions were examined using a TESCAN MAIA3 XMU Scanning Electron Microscope (SEM) to determine the wear mechanisms.…”

Section: Microhardness Test Resultsmentioning

confidence: 99%

Investigation of Mechanical Properties of Grey Cast Irons Reinforced with Carbon Titanium Nitride (TiNC)

Yakut

2023

Lubricants

View full text Add to dashboard Cite

In this study, grey cast iron (GG25) was produced via reinforcement with carbon titanium nitride (TiNC) in different amounts (0%, 0.153%, 0.204% and 0.255%). Samples were made from this material according to the standards for hardness, compression and wear, and then experiments were conducted. The test conditions applied for the TiNC-reinforced samples were similarly applied to unreinforced samples. The TiNC-reinforced and unreinforced samples were compared regarding their compression, hardness, and wear properties. The results of the hardness tests showed the highest average hardness value of 215 HB for sample A (0% TiNC). For TiNC-reinforced specimens, the hardness values of the reinforced specimens increased with increasing reinforcement. Sample B (0.153% TiNC) had an average hardness value of 193 HB. For sample C (0.204% TiNC), an average hardness value of 200 HB was measured. For sample D (0.255% TiNC), an average hardness value of 204 HB was determined. Sample A’s highest compression strength value was 780 MPA (0% TiNC). Similar to the hardness test values, the compression strength of the reinforced samples increased with the increasing reinforcement rate. The compression test value was found to be 747 MPa for sample B (0.153% TiNC), 765 MPa for sample C (0.204% TiNC) and 778 MPa for sample D (0.255% TiNC). Wear tests were performed on all samples to examine changes in the wear volume loss, wear rate and friction coefficients. Scanning electron microscopy (SEM) was used to determine the wear mechanisms on the worn surfaces of the samples. When examining the wear condition of the samples with the same hardness value as a function of increasing load values, increases in the wear volume loss values were observed as the load value increased.

show abstract

“…In the microstructure, the dark etching needles were bainitic ferritic, whereas the light etching matrix was a combination of austenite and martensite. Coarse ferritic needles appeared when the austempering temperature rose, indicating that contact with the austenite phase was increasing [ 45 ]. The images from the microstructure structure and morphological structure provide a qualitative representation of the microstructural development.…”

Section: Effect Of Heat Treatment On Microstructure and Phase Evoluti...mentioning

confidence: 99%

A Review on Heat Treatment of Cast Iron: Phase Evolution and Mechanical Characterization

et al. 2022

View full text Add to dashboard Cite

The isothermal heat treatment process has been identified as a unique process of fabricating exceptional graphite cast iron due to its remarkable mechanical properties, such as excellent machinability, toughness, and high level of ultimate tensile strength. Austempered ductile iron (ADI), ductile iron (DI), and gray cast iron (GCI), known as spheroidal cast irons, are viable alternative materials compared to traditional steel casting, as well as aluminum casting. The graphite nodules from the microstructures of DI, ADI, and GCI are consistently encompassed by acicular ferrite and carbon-saturated austenite in the matrix, forming a distinctive ausferritic structure. All these materials are extensively used in the fabrication of engine sleeves, engine blocks, valves, gears, and camshafts in the automobile sector. With relative motion and outward loads, these components are regularly exposed to surface contact. In this project, it was observed that austempering temperature and a shorter holding period could also be used to manufacture needle-like ferrite platelets for austempered ductile iron (ADI) and other graphite cast irons. To overcome the brittleness challenges and catastrophic failures encountered by applied loads in present-day applications, it is essential to comprehend the isothermal treatments, morphological behaviors, phase analyses, processing techniques, and mechanical properties needed to properly incorporate these materials into future designs. This review article provides detailed information on the characterization and relevant potential mechanisms of ADI, DI, and GCI.

show abstract

Tribological behaviour of ductile and austempered grey cast iron under dry environment

Cited by 10 publications

References 20 publications

A Comparative Investigation on the Wear Performance of Compacted Graphite Iron (CGI) Treated with Single and Double Tempering

A Comparative Investigation on the Wear Performance of Compacted Graphite Iron (CGI) Treated with Single and Double Tempering

Investigation of Mechanical Properties of Grey Cast Irons Reinforced with Carbon Titanium Nitride (TiNC)

A Review on Heat Treatment of Cast Iron: Phase Evolution and Mechanical Characterization

Contact Info

Product

Resources

About