A study on particle erosion behavior of ductile irons

Chang, L. C.; Hsui, I. C.; Chen, Lihui; Lui, Truan-Sheng

doi:10.1016/j.scriptamat.2004.11.026

Cited by 12 publications

(8 citation statements)

References 12 publications

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“…Along with the impact direction, material stack appears on the indentations. This kind of damage style is similar to experimental results obtained by Chang et al [19]. These The water-drops containing micro-particles may have gas nuclei, and the reduction of pressure provides the condition to make the gas nuclei grow micro-bubble after the wet steam was spouted from the nozzle [20].…”

Section: Mechanism Analysis Of Generation Cratersupporting

confidence: 84%

Investigation of Erosion Damages Induced by Wet Steam Containing Micro-Particles

Wang

Qin

et al. 2010

Tribol Lett

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Based on the self-developed experimental apparatus, the wet steam erosion experiments were performed on polished steel specimens. Scanning Electronic Microscope (SEM) and Atomic Force Microscope (AFM) were used to identify the pit characteristics. The experimental results showed that there was little damage on the surface after being impacted by wet steam erosion. However, when the micro-particles were added into the wet steam, not only indentations and scratches but also craters appeared on the eroded surface. Some characteristics of crater, such as the circular shape and intergranular fractures, make the damages distinguish from those of the water-drop or micro-particle impact to solid wall, and they are considered as the results of cavitation erosion.

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Section: Mechanism Analysis Of Generation Cratersupporting

confidence: 84%

Investigation of Erosion Damages Induced by Wet Steam Containing Micro-Particles

Wang

Qin

et al. 2010

Tribol Lett

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“…The tester is similar to those used by other researchers for studying solid particle erosion [67,[70][71][72]. Figure 3 shows a schematic diagram of the dry erosion tester [73,74].…”

Section: Erosion Testmentioning

confidence: 99%

“…Calibration curve for air jet pressure vs particle velocity was reported in a previous study [74] particle velocity range. Other researchers [70,71] have also used higher particle velocities than stated in the ASTM standard. In this study, a wide range of particle velocity was used in order to assess the effect of particle velocity on erosion and corrosion.…”

Section: Erosion Testmentioning

confidence: 99%

Mechanical and Electrochemical Synergism of API X42 Pipeline Steel During Erosion–Corrosion

Islam

Farhat

2015

J Bio Tribo Corros

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Hydro-transportation is an economic and flexible way to transport natural resources such as oil and gas from excavation to the extraction plants, refineries, and consumer-ready products to markets. However, interaction between solid particles, corrosive fluid, and target material often results in significant mutual reinforcement due to the combined action of erosion and corrosion. In this study, erosion-corrosion behavior of API pipeline steel has been assessed in 2 g l -1 NaCl solution purged with CO 2 as the corrosive media and aluminum oxide as the erodent. Four different particle velocities (36, 47, 63, and 81 m s -1 ) were employed, while the angle of incidence was kept constant at 90°. The synergism between erosion and corrosion has been studied by means of a newly designed test approach to mitigate the limitations of the in situ method and to identify the effect of erosion on corrosion and vice versa. The corrosion process was monitored using potentiodynamic polarization and weight loss measurements. Total material loss rate and the components of erosion, corrosion, and their synergistic interactions have been determined. Scanning electron microscopy examination and experimental results show that there is an immense correlation between erosion and corrosion. Significant synergism was observed due to the interaction of different erosion and corrosion mechanisms.

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“…ADI has become an established alternative in many applications that were previously the exclusive domain of steel castings, forgings, weldments, powdered metals, and aluminum forgings and castings [1][2][3][4][5][6]. This material has been also proven to perform very well under different wear mechanisms such as rolling contact fatigue, adhesion, and abrasion [7,8]. Considering the low-cost, design flexibility, flexible machinability, high strength-toweight ratio and good toughness, wear resistance, and fatigue strength of ADI, its usage now is extended into marine application with increasing interest in the study of corrosion and coating of ADI [5,[9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…The typical microstructure of ductile irons, shown in Figure 1(a), includes spheroidal graphite nodules and matrix surrounding them. The bainitic matrix of an austempered ductile iron [8] is illustrated in Figure 1(b). A significant amount of retained austenite is presented as the shape of films and blocks in the matrix.…”

Section: Introductionmentioning

confidence: 99%

Ameliorated Austenite Carbon Content Control in Austempered Ductile Irons by Support Vector Regression

Yang

Chang

Samani

et al. 2013

Mathematical Problems in Engineering

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Austempered ductile iron has emerged as a notable material in several engineering fields, including marine applications. The initial austenite carbon content after austenization transform but before austempering process for generating bainite matrix proved critical in controlling the resulted microstructure and thus mechanical properties. In this paper, support vector regression is employed in order to establish a relationship between the initial carbon concentration in the austenite with austenization temperature and alloy contents, thereby exercising improved control in the mechanical properties of the austempered ductile irons. Particularly, the paper emphasizes a methodology tailored to deal with a limited amount of available data with intrinsically contracted and skewed distribution. The collected information from a variety of data sources presents another challenge of highly uncertain variance. The authors present a hybrid model consisting of a procedure of a histogram equalizer and a procedure of a support-vector-machine (SVM-) based regression to gain a more robust relationship to respond to the challenges. The results show greatly improved accuracy of the proposed model in comparison to two former established methodologies. The sum squared error of the present model is less than one fifth of that of the two previous models.

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A study on particle erosion behavior of ductile irons

Cited by 12 publications

References 12 publications

Investigation of Erosion Damages Induced by Wet Steam Containing Micro-Particles

Investigation of Erosion Damages Induced by Wet Steam Containing Micro-Particles

Mechanical and Electrochemical Synergism of API X42 Pipeline Steel During Erosion–Corrosion

Ameliorated Austenite Carbon Content Control in Austempered Ductile Irons by Support Vector Regression

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