Fracture toughness characterization of austempered ductile iron produced using both conventional and two-step austempering processes

Effects of Molybdenum on the Wear Resistance and Corrosion Resistance of Carbidic Austempered Ductile Iron

“…ADI has been widely used as a structural material in the machine, automobile, and agriculture industries, due to its relatively low production costs coupled its excellent properties, including high tensile strength, satisfactory impact toughness, good fatigue resistance under dynamic loading conditions, and excellent wear resistance [1][2][3]. But the properties of ADI do not satisfy the requirements in some working conditions as a wear resistant material.…”

“…Molybdenum has been considered as an effective alloying element to improve mechanical properties of ultrahigh carbon steel by solution strengthening, refining grain size, and forming carbides [11]. With the addition of Mo, the fracture toughness of ADI improves by affecting the amount of retained austenite present in the sample [2]. However, to date, little has been published concerning the effect of Mo on the wear resistance and corrosion resistance of CADI.…”

Enhancement of Fatigue Properties of Ductile Irons by Successive Austempering Heat Treatment

“…In the second stage, the existing austenite in the microstructure will start to decompose and carbide phases begin to form. Thus, a drop in impact resistance and ductility over time of austempering in ADI alloys is related to start of second stage reaction of austempering in which high-carbon austenite in the structure transforms to ferrite and carbide phases (Ref [19][20][21]. The time interval between the first and the second stages is called heat treatment processing window (Fig.…”

“…This is especially true for ductile irons which have been successively austempered. Since this type of heat treatment has provided satisfactory results ( Ref 2,[16][17][18][19], it seems that the study of fatigue behavior of successive austempered alloys would provide positive results and valuable products.…”

Continuously cast ductile iron: Processing, structures, and properties

“…Sahin et al (2010) investigated the abrasive wear behaviour of ductile iron with dual matrix structures and found that austempered specimens exhibited better abrasive wear resistance (lower weight loss) than that of quenched specimens. Elsayed et al (2009) studied the effect of heat treatment on the fracture toughness of ADI and found that a two-step austempering process resulted in improved fracture toughness of the material. All these developments on ADI have contributed to wider applications of ductile irons.…”