Advanced Properties of Ausferritic Ductile Iron Obtained in As-Cast Conditions

Méndez, Susana; Torre, Urko de la; González-Martínez, R.; Súarez, Ramón

doi:10.1007/s40962-016-0092-9

Cited by 9 publications

(3 citation statements)

References 13 publications

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“…The literature provides methods of elimination of heat treatment from the process of ADI ductile iron production [15]. It is possible to directly cool ductile iron [16] or use alloying elements [17][18][19][20][21][22] that ensure obtaining of an ausferrite micro-structure. This is a very attractive solution, in particular considering the rapidly growing energy prices.…”

Section: Introductionmentioning

confidence: 99%

Optimizing Sand Moulding Process through Regression Models and Destructive Testing

Abdulamer

2023

Archives of Foundry Engineering

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The paper presents results of tests carried out on ausferrite carbide matrix alloyed ductile cast iron. The ausferrite was obtained via addition of Cu and Mo alloying elements. This eliminated heat treatment from the alloy production cycle. The article presents results of tests of the quality of the obtained material. Emphasis was put on metallographic analysis using light and scanning microscopy. Works also included chemical composition tests and EDS analysis. Strength tests were executed in an accredited laboratory. It is possible to create a raw ausferrite carbide matrix without subjecting an alloy to heat treatment. However, it turned out that quality parameters of cast iron were insufficient. The obtained material hardness was 515 HB, while Rm strength and A5 ductility were very low. The low tensile strength of the analyzed alloy resulted from the presence of degenerate graphite secretion (of flake or vermicular shape) in the cast iron. The tests also demonstrated that the alloy was prone to shrinkage-related porosity, which further weakened the material. Alloys made of alloyed ductile iron of ausferrite matrix micro-structure are very attractive due to elimination of the heat treatment process. However, their production process and chemical composition must be optimized.

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Section: Introductionmentioning

confidence: 99%

Optimizing Sand Moulding Process through Regression Models and Destructive Testing

Abdulamer

2023

Archives of Foundry Engineering

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“…Furthermore, ADI has notable fatigue and fracture toughness 6,7 . It is reported that the need and use of heavy section ADI parts in different industries such as automotive and agriculture have increased considerably 8–11 …”

Section: Introductionmentioning

confidence: 99%

Investigation into microstructure and mechanical properties of heavy section nickel alloyed austempered ductile iron in accordance with austempering parameters

Ghoroghi

Varahram

Perseh

2021

Mat Design & Process Comms

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Austempered ductile iron (ADI) is one of the most widely used types of ductile iron produced by austempering heat treatment. ADI heavy section parts are employed in different industries owing to their unique mechanical properties. Cooling rate in thick parts is significantly low, so heavy section ductile iron parts should have an adequate austemperability for preventing pearlite formation in the middle of the casting. In order to achieve the proper austemperability and fully ausferritic structure, alloying elements like nickel are added to the melt. The objective of this work is to study the role of austempering parameters on nickel alloyed ADI specimens fabricated from 75‐mm‐thick Y‐block. Austempering temperature and time as main parameters in the austempering process are taken as the control variables. The heat treatment of austempering was performed at 320°C and 380°C for 60, 120, 180, and 240 min. It was possible to determine the best austempering conditions among those investigated in the paper, and the results showed that austempering at a higher temperature contributes to higher strength and hardness compared to lower austempering temperature. Furthermore, specimens that were austempered at 320°C for 120 min had better mechanical properties among other samples.

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“…The study includes the mechanical properties of ADI and how these properties vary with the different grades of ADI. Mendez et al [15] compared the properties of conventionally heat treated austempered ductile iron with nodular iron having ferritic -pearlitic grades. Murthy et al [16] reported the abrasion behaviour of manganese alloyed permanent moulded ADI.…”

Section: Introductionmentioning

confidence: 99%

Mechanical characterization and optimization of heat treatment parameters of manganese alloyed austempered ductile iron

Hegde

Sharma

Sadanand

2019

JMES

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Austempered Ductile Iron (ADI) belongs to the family of cast irons whose mechanical properties are altered using austempering heat treatment process. The objective of this paper is to study the effects of heat treatment parameters on manganese alloyed ADI. Hence, austenitization temperature, austempering temperature and austempering time are taken as the control variables along with the manganese content in the material. The effects of heat treatment are studied by measuring the ultimate tensile strength and the hardness of the material. The regression equations are developed to relate the various parameters under study. The microstructures of the specimen reveal that retained austenite content increases with increase in manganese and results in decrease in hardness of the material. The statistical analyses indicate that the austempering temperature is the major factor affecting the variation in hardness and tensile strength with 74.5 % of contribution within the range of values whereas, variation in manganese content does not have significant effect on hardness within the investigated composition range in the material.

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Advanced Properties of Ausferritic Ductile Iron Obtained in As-Cast Conditions

Cited by 9 publications

References 13 publications

Optimizing Sand Moulding Process through Regression Models and Destructive Testing

Optimizing Sand Moulding Process through Regression Models and Destructive Testing

Investigation into microstructure and mechanical properties of heavy section nickel alloyed austempered ductile iron in accordance with austempering parameters

Mechanical characterization and optimization of heat treatment parameters of manganese alloyed austempered ductile iron

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