Chemical composition of chosen phase constituents in austempered ductile cast iron

Warmuzek, M.; Polkowska, Adelajda

doi:10.3139/120.111205

Cited by 3 publications

(1 citation statement)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the effect of morphology and size of the second phase particles, that is, graphite spheroids has been taken into account mainly in the context of material's macroscopic properties (Cooper, Elliott, & Young, ; Gaudig, Mellert, Weber, & Schmauder, ). Microscopic observations of fracture surface topography of cast irons were usually focused on the damage mechanism in the metal matrix, due to either applied loading mode or its microstructure characteristic (Fatahalla & Hussein, ; Gazda, Warmuzek, & Bitka, ; Martínez, ; Warmuzek & Polkowska, ).…”

Section: Introductionmentioning

confidence: 99%

Microscopic approach to micromechanism of damage in spheroidal cast iron

Warmuzek

Polkowska

Gazda

2020

Microscopy Res & Technique

Self Cite

View full text Add to dashboard Cite

In this work, the observations of the fracture surface after standard tensile tests of several kinds of spheroidal cast irons, ferritic and austempered ductile irons, have been carried out by means of scanning electron microscopy. The local crack path in the area of graphite (G)/matrix (M) interface has been analyzed as affected by a matrix phase composition and the austempering treatment parameters. The obtained results allowed identifying some determination factors for debonding mode at the G/M interface and their role in a final damage mechanism. Some microstructural details in the microregions composed of graphite and matrix showed that the G-M debonding mode in the separation area of the G/M interface seems to be controlled by macroscopic properties of the alloy and by the morphology of G/M interface. On the other hand, the internal destruction of graphite nodule has been mainly determined by a structure and anisotropy of graphite crystal lattice. K E Y W O R D S characterization, electron microscopy, fracture behavior, iron alloys

show abstract

Section: Introductionmentioning

confidence: 99%

Microscopic approach to micromechanism of damage in spheroidal cast iron

Warmuzek

Polkowska

Gazda

2020

Microscopy Res & Technique

Self Cite

View full text Add to dashboard Cite

show abstract

Influence of partitioning treatment on microstructure and mechanical properties of an alloyed ductile iron austempered at different temperatures

et al. 2023

View full text Add to dashboard Cite

The present study was conducted to uncover effects of partitioning treatment on Cu–Ni–Mo alloyed ductile iron (DI) austempered at different temperatures. For this purpose, the DI samples, produced via sand casting, were austenitized at 900 °C for 60 min, followed by austempering at the temperatures of 275–325–375 °C for 120 min and afterwards a partitioning treatment was applied at 200 °C for 15 min. In the characterization studies, dilatometer, image analysis, JMat-Pro, mechanical tests, XRD, optical microscope, and scanning electron microscope (SEM) equipped with EBSD detector were utilized. Characterization studies showed that the effects of partitioning treatment were directly correlated with austempering temperature and high carbon austenite volume fraction changed in the range of 19.48–35.45%. That redistribution of carbon (C) between bainitic ferrite and high carbon austenite occurred, in turn, the carbon content of high carbon austenite increased with the partitioning treatment irrespective of austempering temperature were uncovered. Furthermore, the partitioning treatment considerably changed the grain morphologies of both high carbon austenite and banitic ferrite. As a consequence of these microstructural differences, the highest tensile strength of 1489.2 MPa was established in the sample austempered at 275 °C and partitioned at 200 °C, whereas the highest ductility of 5.61% acquired at the austempering temperature of 375 °C.

show abstract

Microstructure and properties of Cu-bearing carbidic austempered ductile iron

Nan

Yang

et al. 2019

International Journal of Materials Research

View full text Add to dashboard Cite

In this paper, the effects of copper addition (0–2.0 wt.%) on the microstructure and properties of carbidic austempered ductile iron were studied using an optical microscope, a scanning electron microscope, a Rockwell hardness tester, a pendulum impact tester, an X-ray diffractometer, a block-on-ring wear testing machine and an electrochemical tester. The amount of carbides and graphite nodules simultaneously decreased with the increase in Cu content. Cu also improved the nodularity of graphite, made the graphite nodules grow, increased the pearlite content and refined the pearlite. After austenitizing (900°C / 100 min) and austempering (300°C / 100 min), the amount and size of the acicular ferrite significantly reduced with the addition of Cu. In contrast, the amount of retained austenite dramatically increased, and the carbon content in retained austenite slightly increased. The hardness of carbidic austempered ductile iron had no obvious change with the increase in Cu content. The wear resistance of carbidic austempered ductile iron first increased and subsequently decreased, and the impact toughness and corrosion resistance were improved with the increase in Cu content. The comprehensive properties of carbidic austempered ductile iron were optimal, with the Cu content of 1.0 wt.%.

show abstract

Chemical composition of chosen phase constituents in austempered ductile cast iron

Cited by 3 publications

References 15 publications

Microscopic approach to micromechanism of damage in spheroidal cast iron

Microscopic approach to micromechanism of damage in spheroidal cast iron

Influence of partitioning treatment on microstructure and mechanical properties of an alloyed ductile iron austempered at different temperatures

Microstructure and properties of Cu-bearing carbidic austempered ductile iron

Contact Info

Product

Resources

About