Erosion mechanisms of nodular and gray cast irons at different impact angles

Yıldızlı, Kemal; Karamış, Mehmet; Nair, Fehmi

doi:10.1016/j.wear.2006.01.042

Cited by 32 publications

(12 citation statements)

References 18 publications

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“…Yi et al (2019) studied the critical flow velocity (CFV) in different local eroded regions and found the relationship between exposed area of a sample and CFV behavior. Yildizli et al (2006) studied the erosion of nodular cast iron (NCI) and gray cast iron (GCI) occurred at intermediate and normal impact angle and found that considerable weight loss varied with the impact angle, where the highest erosion rate occurred at impact angle 30°, the intermediate rate at 60° and the lowest rate at normal impact angle. In addition, the erosion rate of NCI was lower than that of GCI at all impact angles.…”

Section: Introductionmentioning

confidence: 99%

Investigation of erosion behavior of 304 stainless steel under solid–liquid jet flow impinging at 30°

Zhao

Tang

et al. 2020

Pet. Sci.

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This work carried out liquid-solid two-phase jet experiments and simulations to study the erosion behavior of 304 stainless steel at 30° impingement. The single-phase impinging jet was simulated using dense grid by one-way coupling of solid phase due to its dilute distribution. The simulation results agreed well with experiments. It was found that after impinging particle attrition occurred and particles became round with decreasing length-ratio and particle breakage occurred along the "long" direction. Both experiment and simulations found that the erosion generated on the sample could be divided into three regions that were nominated as stagnant region, cutting transition region and wall jet region. Most particle-wall impacts were found to occur in the cutting transition region and the wall jet region. In the cutting transition region, holes and lip-shaped hogbacks were generated in the same direction as the flow imping. In the wall jet region, furrows and grooves were generated. The averaged grooves depth tended to become constant with the progress of impinging and reach the steady state of erosion in the end. In addition, it was found that impinging effect increased erosion and anti-wear rate.

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Section: Introductionmentioning

confidence: 99%

Investigation of erosion behavior of 304 stainless steel under solid–liquid jet flow impinging at 30°

Zhao

Tang

et al. 2020

Pet. Sci.

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“…To produce as economical as possible, gray cast iron with lamellar graphite can be used. Yet corrosion, cavitation and abrasive materials can make higher alloyed base materials necessary, resulting not only in reduced castability, but also in higher production costs because expensive alloys are also present in areas without exposition to the medium (Ref [1][2][3]. Through the surface layer located in the areas affected by corrosion, cavitation and abrasion, it is possible to reduce costs, increasing the effectiveness and life of the component (4)(5)(6)(7)(8)(9)(10)(11).…”

Section: Introductionmentioning

confidence: 99%

Influence of Preheating on Lamellar Gray Cast Iron for Surface Layer Welding applications with Plasma-Transferred Arc Powder and Metal Inert Gas Welding Processes with Duplex Steel as Filler Material

et al. 2020

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The good capacity of gray cast iron for the manufacture of complex geometry components is widely recognized, but its low resistance to corrosion and low weldability complicate the use of this material for some industrial applications. The corrosion resistance can be improved by metallic surface layers using welding processes with low percentages of dilution between the filler and base material. However, the welding processes impose very high heat load on the base material, which in the case of cast iron could promote the formation of hard and brittle microstructures, facilitating the formation of cracks. This work deals with weld beads of duplex steel on lamellar gray cast iron made either by plasma-transferred arc powder (PTA-P) or by metal inert gas (MIG) using the cold metal transfer (CMT) technology, with emphasis on achieving low dilution, hardness and imperfections (internal porosities). Preheating was used to reduce the hardness in the heat-affected zone, while different levels of helium were added in the shielding gas to study its effect on the geometry and hardness of the weld beads. The results showed that the PTA-P process resulted in lower values of dilution and hardness because of a low cooling rate compared to that of the MIG-CMT process. In addition, it was observed that preheating the base material reduced the hardness of the heat-affected zone but increased the dilution of the weld bead.

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“…Therefore, grey cast iron is used because of its benefits, namely high damping, cost effectiveness, ease of machining and good castability [5,6]. However, grey cast iron is very susceptible to corrosion [7][8][9]. Alloying with chromium and nickel can only solve this problem partly, since the castability deteriorates and costs increase.…”

Section: Introductionmentioning

confidence: 99%

Improving the corrosion and wear resistance of grey cast iron components by surface welding with duplex stainless steel using regulated gas metal arc welding: Influence of dilution on corrosion properties

Reisgen

Sharma

Wieland³

et al. 2018

Materialwissenschaft Werkst

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Surface welding of duplex stainless steel on lamellar grey cast iron was performed to produce thick (several millimetres) protective surface layers with a regulated gas metal arc welding process. As dominant parameters, the influence of the composition of the shielding gas (argon-helium mixture) as well as preheating temperature on the corrosion resistance were investigated. Both the addition of helium to shielding gas and preheating of the base material increase the heat input and reduce the cooling rates and result in higher dilution. This leads to reduced hardness in the heat affected zone and prevents cracking. However, the formation and portion of carbides in the surface layers increase. The influence of these parameters on the microstructure in the surface layers as well as in the heat affected zone and the influence on the corrosion behaviour in artificial seawater were investigated with immersion tests and potentiodynamic polarization measurements. The corrosion properties of the parent lamellar grey cast iron were greatly enhanced by the surface layers, but inferior to duplex stainless steel. With additional metallographic investigations the corrosion mechanisms were investigated. The corrosion mechanisms are extensively influenced by the phase distribution in the surface layers and by the formation of carbides.Keywords: Grey cast iron / surface welding / regulated gas metal arc welding process / microstructure / corrosion Corresponding author: B. Heider, Zentrum fü r Konstruktionswerkstoffe (MPA-IfW Darmstadt), TU Darmstadt,

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Erosion mechanisms of nodular and gray cast irons at different impact angles

Cited by 32 publications

References 18 publications

Investigation of erosion behavior of 304 stainless steel under solid–liquid jet flow impinging at 30°

Investigation of erosion behavior of 304 stainless steel under solid–liquid jet flow impinging at 30°

Influence of Preheating on Lamellar Gray Cast Iron for Surface Layer Welding applications with Plasma-Transferred Arc Powder and Metal Inert Gas Welding Processes with Duplex Steel as Filler Material

Improving the corrosion and wear resistance of grey cast iron components by surface welding with duplex stainless steel using regulated gas metal arc welding: Influence of dilution on corrosion properties

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