Thermo-mechanically processed dual matrix ductile iron produced by continuous cooling transformation

Soliman, Mohamed; Ibrahim, Hossam; Nofal, Adel; Palkowski, Heinz

doi:10.1016/j.jmatprotec.2015.07.025

Cited by 10 publications

(2 citation statements)

References 22 publications

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“…Both IADI (1&2) alloys showed elongation and impact toughness values higher than the conventional ADI grades, apparently, the due to the presence of proeutectoid ferrite, whereas the increased strength is attributed to the reinforcing effect of ausferrite in the structure. The effect of ferrite content in IADI alloys was reported [8][9]. The mechanical properties of IADI is controlled by the interaction between the strain hardening component, i.e., retained austenite and ferrite.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

High Strain Rate Dynamic Deformation of ADI

Myszka

Ahmed

Nofal

et al. 2018

MSF

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Engineering materials used in numerous applications, particularly in automotive crash loading and military ballistic purposes have to meet new demands, one of which is the resistance to dynamic loading. As the phenomena associated with such interaction is rather complex, non-static types of tests are applied to evaluate and compare between different potential materials. In this Work, different grades of ADI were produced under different austenitizing and austempering conditions different ausferrite morphologies. The effect of alloying elements such as Cu and Mo on the initial microstructure of the ductile iron was also studied. The initial amount of retained austenite was subjected to different dynamic strain rates. The hardness and strain induced martensitic transformation as a function of the microstructure and strain rate were evaluated. Extensive use of XRD and SEM was made to evaluate the high strain rate properties of the investigated grades.

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Section: Mechanical Propertiesmentioning

confidence: 99%

High Strain Rate Dynamic Deformation of ADI

Myszka

Ahmed

Nofal

et al. 2018

MSF

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“…Since the matrix of DCIs has similar chemical composition and microstructure to the steels, some methods of heat treatment methods used in the steels can also be used in DCIs to change its matrix microstructure and then its properties. So far, the properties of DCIs have already improved by several heat treatment methods used in the steel, such as electropulsing annealing [9], quenching and tempering [10], thermomechanically treatment [11], austempering [12][13], and quenching and partitioning [14]. Among them, quenching and partitioning process is an important heat treatment method for steel and has already been discussed in details [15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Quenching and Partitioning Heat Treatment on Ductile Cast Irons

Zhao

Wang²,

Hang

et al. 2016

MATEC Web Conf.

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Abstract. In this study, the ductile cast irons were prepared by the melting process and then carried out the quenching and partitioning heat treatment. The microstructures were observed by both an optical microscopy and a field emission scanning electron microscope and the tensile strengths were measured by a uniaxial tensile tester. The effect of partitioning time on the microstructures and the tensile strength were investigated. The results showed that the matrix of as-cast samples contain about 26% ferrite and 74% pearlite and the microstructure quenched without partitioning consisted of a mixture of graphite nodules plus lath martensite plus retained austenite. With the increase of the partitioning time, the retained austenite became stable and could transform into lower bainite or carbide gradually, which gave rise to the fact that the tensile strength changed nonlinearly and reached a maximum at the partitioning time about 120 minutes.

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