Journal ArticleDOI
Material Characterization of Austempered Ductile Iron (ADI) Produced by a Sustainable Continuous Casting–Heat Treatment Process
Anil Meena,Mohamed El Mansori +1 more
TLDR
In this paper, the authors explored the new processing technology for direct manufacturing of lightweight austempered ductile iron (ADI) casting in a permanent mold, which is based on the innovative integrated approach toward casting and heat-treatment process.Abstract:
Selecting a suitable manufacturing process is one way of achieving sustainability of a product by diminishing energy consumption during its production cycle and improving material efficiency. The article attempts to explore the new processing technology for direct manufacturing of lightweight austempered ductile iron (ADI) casting in a permanent mold. The new processing technology is based on the innovative integrated approach toward casting and heat-treatment process. In this technology, the ductile iron samples obtained using the permanent mold are first austenized immediately after solidification process followed by austempering heat treatment in the fluidized bed and then air cooled at room temperature to obtain ADI material. The influence of austempering time on the microstructural characteristics, mechanical properties, and strain-hardening behavior of ADI was studied. Optical microscopy, scanning electron microscopy (SEM), and X-ray diffraction (XRD) analyses were performed to correlate the mechanical properties with microstructural characteristics. It was observed that the mechanical properties of resulting ADI samples were influenced by the microstructural transformations and varied retained austenite volume fractions obtained due to different austempering time. The results indicate that the strain-hardening behavior of the ADI material is influenced by the carbon content of retained austenite.read more
Citations
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Specific cutting force, tool wear and chip morphology characteristics during dry drilling of austempered ductile iron (ADI)
Anil Meena,M. El Mansori +1 more
TL;DR: In this paper, the impact of cutting conditions on chip morphology and surface roughness is also investigated, and the experimental results revealed that the combination of low feed rate and higher cutting speed leads to higher mechanical and thermal loads on the tool's cutting edge, resulting in higher specific cutting force values.
Journal ArticleDOI
On the significance to use dislocation-density-related constitutive equations to correlate strain hardening with microstructure of metallic alloys: The case of conventional and austempered ductile irons
TL;DR: In this article, the authors compared the empirical Hollomon equation and the dislocation-density-related Voce equation to analyze the different strain hardening behaviors of DIs and ADIs, and found that the DIs strain-hardening behavior was mainly caused by the fine pearlitic structure, consisting of ferritic lamellae with sub-micrometric widths.
Journal ArticleDOI
Assessment of the microstructure evolution of an austempered ductile iron during austempering process through strain hardening analysis
TL;DR: In this article, the authors determined a procedure based on tensile testing to assess the critical range of austempering times for having the best ausferrite produced through Austempering.
Journal ArticleDOI
Advanced Properties of Ausferritic Ductile Iron Obtained in As-Cast Conditions
TL;DR: In this article, the physical properties of the ausferritic as-cast materials were characterized and an experimental model was developed to define the optimal processing parameters of castings presenting different thermal moduli, in terms of chemical composition, temperatures and time parameters.
References
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Journal ArticleDOI
Effect of composition and heat treatment parameters on the characteristics of austempered ductile irons
A. Trudel,Martin Gagné +1 more
TL;DR: The most recently developed materials of the DI family, Austempered Ductile Irons (ADI) as mentioned in this paper, have been shown to provide properties that favorably compare to those of steel while taking advantage of a near-net shape manufacturing process.
Journal ArticleDOI
Development of austenite free ADI (austempered ductile cast iron)
TL;DR: In this article, the authors used a heat treatment process consisting of austempering and subsequent isothermal tempering below the inter critical (A 1 ) temperature of ductile cast iron, which resulted in a fully ferritic microstructure.
Journal ArticleDOI
Study of dry and minimum quantity lubrication drilling of novel austempered ductile iron (ADI) for automotive applications
Anil Meena,M. El Mansori +1 more
TL;DR: In this paper, the use of dry and minimum quantity lubrication (MQL) to drill austempered ductile iron (ADI), a new class of materials used for light weight automotive components like connecting rods and crankshafts, is reported.
Journal ArticleDOI
The effects of metallurgical process variables on the properties of austempered ductile irons
P. A. Blackmore,R. A. Harding +1 more
TL;DR: In this article, the effects of metallurgical variables on both the structure and mechanical properties of austempered ductile irons having predominantly bainitic structures are described, on the basis of work carried out at BCIRA and elsewhere.
Journal ArticleDOI
Effect of rare earth element on microstructure formation and mechanical properties of thin wall ductile iron castings
TL;DR: In this article, the effects of sample thickness and rare earth element content on microstructural formation and selected mechanical properties were examined in ductile iron castings with 2, 3, 4, 6, 8, and 25mm thickness and various amount of rare earth elements.