Influence of Heat Treatment Conditions on Microstructure and Mechanical Properties of Austempered Ductile Iron After Dynamic Deformation Test

Myszka, D.; Cybula, Leszek; Wieczorek, Andrzej

doi:10.2478/amm-2014-0204

Cited by 17 publications

(12 citation statements)

References 7 publications

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“…18) deformed as a result of dynamic strain after the Taylor's test lies flat to the surface [37]. Chinella et al [38] found a significant deformation of graphite nodules after a ballistic test.…”

Section: Discussionmentioning

confidence: 99%

Abrasive Wear Properties of Fe-Based Alloys Designed for Mining Applications

Wieczorek¹,

Myszka²

2017

Archives of Metallurgy and Materials

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The purpose of this study was to determine experimentally the wear properties of 5 groups of iron-based alloys used in the mining and transport machines exposed to the action of a hard abrasive material. The groups of materials to be examined included austempered ductile irons (ADI), steels and cast steel designed for quenching and tempering and for surface hardening, hard-wearing hardened steels and structural steels. The wear tests were carried out on a disc-on-disc test rig. The test samples were examined under conditions of sliding mating, while the leading destructive process was microcutting of the surface with loose corundum grain. The loss of mass of the examined samples was measured as a parameter characterizing the wear. Base on it, other wear coefficients were determined, for example the volume loss, the intensity of wear and the wear rate. The volume loss values determined were presented as a function of the strength and the initial hardness. Based on the results obtained, it was found that the hardened steel and ADI had comparable wear properties, while the ADI surface was strengthened probably as a result of the transition of austenite into martensite and the impact of the deformation of the graphite contained in ADI on the abrasive wear of the surface.

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Section: Discussionmentioning

confidence: 99%

Abrasive Wear Properties of Fe-Based Alloys Designed for Mining Applications

Wieczorek¹,

Myszka²

2017

Archives of Metallurgy and Materials

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“…The investigated samples were machined from the cast blocks into cylindrical shape with 8 mm diameter and 28 mm length. According to Taylor assumptions which are described in detailed in different references [5][6], the dynamic yield strength could be calculated using the following equation (Eq.1):…”

Section: Taylor Impact Testmentioning

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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“…Yamamoto et al [9] investigated the strain rate effects at different temperatures of as-cast and ferritic annealed DCI using Charpy impact test. Myszka et al [10] analyzed several grades of ADI, austempered at different temperatures, using Taylor's cylinder impact test, with the attempt to determine the effect of dynamic load on the strain driven transformation of matrix phases. No information is available, to the best authors' knowledge, about the mechanism by which the strain rate affects the ADIs ductility.…”

Section: Introductionmentioning

confidence: 99%

Strain rate effects on fracture behavior of austempered ductile irons

Ruggiero

Bonora

Gentile

et al. 2018

AIP Conference Proceedings

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In this work, the mechanical behavior of the austempered ductile iron (ADI) JS/1050-6 was investigated, with particular attention to the strain rate effects on the material ductility. Tensile tests at different strain rates (up to 10 3 s −1) and temperatures (ranging from 213 to 343 K) were performed. Samples with different geometries, smooth and round notched bars, were used to evaluate the effect of the stress triaxiality level on the strain at fracture. For each configuration, the evolution paths of stress and strain were extracted in the point where failure is expected performing numerical analyses at the continuum scale. Stress histories were used as input in a micromechanics analysis aimed to analyze the heterogeneous state of stress, determined by the presence of the graphite nuclei, under the different loading conditions obtained in the experiments. The main result is that, under dynamic conditions, the stress field redistribution, due to the adiabatic condition, postpones the failure occurrence, regardless temperature and strain rate effects on the matrix ductility.

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Influence of Heat Treatment Conditions on Microstructure and Mechanical Properties of Austempered Ductile Iron After Dynamic Deformation Test

Cited by 17 publications

References 7 publications

Abrasive Wear Properties of Fe-Based Alloys Designed for Mining Applications

Abrasive Wear Properties of Fe-Based Alloys Designed for Mining Applications

High Strain Rate Dynamic Deformation of ADI

Strain rate effects on fracture behavior of austempered ductile irons

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