Metallurgical parameters, mechanical properties and machinability of ductile cast iron

Fatahalla, N.; Bahi, Sherif; Hussein, O.

doi:10.1007/bf01160826

Cited by 22 publications

(9 citation statements)

References 2 publications

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“…Figure 3 shows that the stance between the nodule and the hollow at 4.5 mm/s speed is relatively small and plentiful compared to that at 1.5 mm/s. The small distance shows that the material has a brittle property [6].…”

Section: The Description Of Tensile Test Resultsmentioning

confidence: 99%

“…Figure 4 shows that the distance between the nodule and the hollow at 9 mm/s speed is relatively small and plentiful compared to that at 1.5mm/s. The small distance indicates that the material has a brittle property [6]. The brittle fracture occurred because of the plastic deformation and a quick particle separation that created cleavage [13].…”

Section: The Description Of Tensile Test Resultsmentioning

confidence: 99%

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Crosshead Speed Effects on Ferro Casting Ductile (Fcd) Tensile Strength and Fault Morphology

Andoko¹

2019

MM SJ

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Nodular cast iron or Ferro casting ductile (FCD) is the developmental result of grey cast iron. Nodular cast iron has mechanical properties similar to carbon steel, which are better than the mechanical properties of grey cast iron. The 1.5 mm/s crosshead speed created a tensile strength of 549.8 N/mm 2 . It gradually declined to 401.4 N/mm 2 at 4.5 mm/s and 302.6N/mm 2 at 9 mm/s. Differentiation in strain rates at the speed variations caused the decline in tensile strength, creating energy lost due to the plastic deformation that resulted in the quick break in the specimen. The increase in strain rates influenced the yield strength results. These occurrences meant that the slower pullout generated a more static material. Thus, there was no declination in the tensile strength. Observed from the fault morphology results, a variant with 1.5 mm/s speed had ductile fractures, 4.5 mm/s speed variant had a combination of ductile-brittle fractures and 9 mm/s speed variant had brittle fractures.

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Section: The Description Of Tensile Test Resultsmentioning

confidence: 99%

Section: The Description Of Tensile Test Resultsmentioning

confidence: 99%

Crosshead Speed Effects on Ferro Casting Ductile (Fcd) Tensile Strength and Fault Morphology

Andoko¹

2019

MM SJ

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“…The materials investigated were produced in a normal production process of El Nasr Castings Co. in Egypt; Fatahalla et al [10]. Pig iron, commercially pure iron and other alloys were melted in a basic high frequency induction furnace with a melt capacity of 6 ton/hr.…”

Section: Materials and Meltingmentioning

confidence: 99%

“…The melt was then superheated and held at 1773 K for 0.6 ks. It was then tapped into a preheated ladle at 1733 K with a pocket in the base (Sandwich Technique) [10]. It was then inoculated (16% by weight of charge) using Fe-Si-Mg alloy (45, 50 and 5 mass % respectively) having a grain size of 15 -50 mm.…”

Section: Materials and Meltingmentioning

confidence: 99%

Microstructure, Mechanical Properties, Toughness, Wear Characteristics and Fracture Phenomena of Austenitised and Austempered Low-Alloyed Ductile Iron

Fatahalla¹,

Hussein²

2015

OALib

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Conventional ductile iron (DI) and austempered ductile iron (ADI) alloys were successfully produced. The alloying elements-Ni, Mo, Cr and Mn were added to get as-cast low-alloyed ductile iron (LADI) followed by austempering heat treatment. Hardness was measured for all investigated alloys. A hardness conversion table was deduced for irons investigated. Highest values of calculated quality index (QI) were for ADI alloys implying higher material performance. Impact energy values were attributed to microstructure and tensile properties. Wear characteristics of selected ADI alloys showed comparable values with LADI. Micro-hardness values were used to identify the micro-constituents and the work-hardened layers. Fracture modes were revealed and fracture surface observations were done by SEM. Due to higher toughness and QI, and cheap price, it is suggested that rolling mills may be produced from ADI, specially heat-treated instead of LADI.

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“…The test plates may have revealed largely irrelevant distortions after being preheated.The filler weld was made using 97.6% Ni electrodes in order to minimize carbide formation as well as improving the service conditions.The weld was carried out on a series of test plates that were pre-heated to 350 • C. Once the welds were finished, some of the plates were air-cooled, while others were immediately annealed at 900 • C in order to observe the different metallurgical behavior produced by these treatments [7].…”

Section: Mechanical Characteristics Valuesmentioning

confidence: 99%

An Analysis of the Weldability of Ductile Cast Iron Using Inconel 625 for the Root Weld and Electrodes Coated in 97.6% Nickel for the Filler Welds

Carrasco

Pérez-Puig

Guillamón

et al. 2016

Metals

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This article examines the weldability of ductile cast iron when the root weld is applied with a tungsten inert gas (TIG) welding process employing an Inconel 625 source rod, and when the filler welds are applied with electrodes coated with 97.6% Ni. The welds were performed on ductile cast iron specimen test plates sized 300 mm × 90 mm × 10 mm with edges tapered at angles of 60 • . The plates were subjected to two heat treatments. This article analyzes the influence on weldability of the various types of electrodes and the effect of preheat treatments. Finally, a microstructure analysis is made of the material next to the weld in the metal-weld interface and in the weld itself. The microstructure produced is correlated with the strength of the welds. We treat an alloy with 97.6% Ni, which prevents the formation of carbides. With a heat treatment at 900 • C and 97.6% Ni, there is a dissolution of all carbides, forming nodules in ferritic matrix graphite.

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Metallurgical parameters, mechanical properties and machinability of ductile cast iron

Cited by 22 publications

References 2 publications

Crosshead Speed Effects on Ferro Casting Ductile (Fcd) Tensile Strength and Fault Morphology

Crosshead Speed Effects on Ferro Casting Ductile (Fcd) Tensile Strength and Fault Morphology

Microstructure, Mechanical Properties, Toughness, Wear Characteristics and Fracture Phenomena of Austenitised and Austempered Low-Alloyed Ductile Iron

An Analysis of the Weldability of Ductile Cast Iron Using Inconel 625 for the Root Weld and Electrodes Coated in 97.6% Nickel for the Filler Welds

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