Effect of Heat Treatment Parameters on the Characteristics of Thin Wall Austempered Ductile Iron Casting

Upadhyaya, Rajat; Singh, Khomdram Jolson; Kumar, Rajeev

doi:10.1088/1757-899x/330/1/012084

Cited by 4 publications

References 1 publication

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Effect of Isothermal Heat Treatment Time on the Microstructure and Properties of 4.3% Al Austempered Ductile Iron

Shakeri

Heidari²,

Boutorabi³

2023

Inter Metalcast

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This study aimed to investigate the effect of replacing silicon with 4.3% aluminum on the kinetics of the bainitic transformation and its effect on the physical properties of cast iron with a chemical composition of 3.4% C, 4.3% Al, 0.32% Si, 0.04% Mg. First, the samples were prepared to the same dimensions followed by austenitization for 2 hours at 900 °C; Then, austempering was performed on the samples at four temperatures i.e., 375 °C, 400 °C, 425 °C, and 450 °C (hightemperature region) for different periods (1-512 min). Microstructural studies were performed by both optical and electron microscopes and it was found that with an increase in the austempering temperature, the thickness of the bainitic ferrite plates increased from 0.31 μm at 375 °C to 0.63 μm at 450 °C and a coarser microstructure was obtained. The results of this study showed that the austempering transformation in Al-alloyed ductile iron will result in the formation of an ausferritic structure.

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Effect of Isothermal Heat Treatment Time on the Microstructure and Properties of 4.3% Al Austempered Ductile Iron

Shakeri

Heidari²,

Boutorabi³

2023

Inter Metalcast

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Investigation of the Quality of Flywheel SG Iron Sand Casting Using the Optimized Riser Dimensions: Numerical Simulation and Experimental Validation

Upadhyaya,

Singh,

Gautam

et al. 2024

Inter Metalcast

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Effects of austempering time on the microstructure and properties of austempered ductile iron

Shi

Dong

Sun

et al. 2022

Metall. Res. Technol.

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The effects of austempering time on the structure and properties of high-strength austempered ductile iron were studied by using optical microscopy (OM), X-ray diffractometer (XRD) and scanning electron microscope (SEM). The results show that the matrix structure of austempered ductile iron (ADI) consists of acicular ferrite and retained austenite. With the increase of austempering time, the content of acicular ferrite increases and the content of retained austenite first increases and then decreases, which results in tensile strength, elongation and impact toughness increase whereas hardness and wear resistance decreases. The fracture characteristics of the ADI specimens change from brittle fracture to ductile fracture with the increase of austempering time. ADI has excellent comprehensive mechanical properties after austenitizing at 900 °C for 90 min and then austempering at 250 °C for 120 min.

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Effect of Heat Treatment Parameters on the Characteristics of Thin Wall Austempered Ductile Iron Casting

Cited by 4 publications

References 1 publication

Effect of Isothermal Heat Treatment Time on the Microstructure and Properties of 4.3% Al Austempered Ductile Iron

Effect of Isothermal Heat Treatment Time on the Microstructure and Properties of 4.3% Al Austempered Ductile Iron

Investigation of the Quality of Flywheel SG Iron Sand Casting Using the Optimized Riser Dimensions: Numerical Simulation and Experimental Validation

Effects of austempering time on the microstructure and properties of austempered ductile iron

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