Numerical Model of Machining Considering the Effect of MnS Inclusions in an Austenitic Stainless Steel

Chagas, Gil Magno Portal; Machado, Izabel Fernanda

doi:10.1016/j.procir.2015.04.093

Cited by 14 publications

(6 citation statements)

References 8 publications

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“…High plastic strain through the chip thickness produces highly elongated ferrite grains and extrusion of the dark irregular iron sulfides along a direction parallel to the chip-tool interface. These oriented sulfides may decrease the shear stress in the secondary zone [28]. For Astaloy85Mo with 4 wt% MoS 2 , an additional lighter FeMo 3 phase tends to align in the direction of deformation (Fig.…”

Section: Cutting Forces and Chip Formationmentioning

confidence: 96%

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Orthogonal cut of SPS-sintered composites with ferrous matrix and Fe Mo S particles: Numerical and experimental analysis

Souza

Ordoñez

Mezghani

et al. 2020

Tribology International

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Metal-matrix composites with solid lubricant reinforcements may present a suitable alternative to improve the tribological behavior of sintered components. Besides the performance during the application, the presence of solid lubricants may also modify component manufacture, for example, during machining operations to achieve complex shapes not directly obtained from the sintering process. This work describes a numerical and experimental analysis on the orthogonal cut of metal-matrix composites composed of FeeMoeS particles embedded in an Astaloy 85 Mo (Höganäes AB) matrix. Specimens were prepared using the Spark-Plasma Sintering (SPS) technique, from mixtures containing powders of Astaloy 85 Mo steel and 2 wt% or 4 wt% of molybdenum disulfide (MoS 2). An unreinforced Astaloy 85 Mo specimen (without MoS 2) was also included in the analysis. Different microstructures were observed after SPS. The unreinforced specimen presented a ferrite-pearlite structure with a porosity level below 2% and the specimen sintered with 2 wt% of MoS 2 presented iron sulfide particles dispersed in the steel matrix. The structure of the specimen sintered with 4 wt % was more complex, with two distinct phases dispersed in the Astaloy 85 Mo matrix. Experimental orthogonal cuts were conducted on the three specimens using a shaper machine tool equipped with a tungsten carbide (WCeCo) cutting insert. Tests were recorded using a high-speed camera. The machined surfaces were later analyzed with an optical profilometer and in a scanning electron microscope (SEM) with energy-dispersive X-ray spectroscopy (EDS). The chips were also characterized. The cutting operation was simulated by two-dimensional (2D) finite-element analysis. The meshes were prepared based on the specimen microstructures and considering the properties of the individual phases. Results have indicated significant differences in the cutting process. Observation of the chip surfaces indicates plastic deformation on the unreinforced specimen, in opposition to more uniform scratches on the composite surfaces, especially that of the specimen sintered with 4 wt % of MoS 2 .

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Section: Cutting Forces and Chip Formationmentioning

confidence: 96%

“…Results have indicated that during dry machining the sulfide secondary phase may act as stress concentration points. Thus, secondary phases with more irregular morphology or the presence of a higher volume fraction may increase these stress concentration regions and enhance the cutting efficiency [28].…”

Section: Introductionmentioning

confidence: 99%

Orthogonal cut of SPS-sintered composites with ferrous matrix and Fe Mo S particles: Numerical and experimental analysis

Souza

Ordoñez

Mezghani

et al. 2020

Tribology International

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show abstract

“…During the 2010's, further studies were conducted in LFS on sintered materials (SPS) [243], modelling of tribological phenomena [244][245][246], wear mode transitions [247,248] and abrasion, with emphasis on fundamentals of abrasive processes [249,250], abrasionresistant materials [251,252], and micro-abrasion tests [87, 253,254]. Other topics included the tribological behaviour of plasma-sprayed coatings [255] and water lubrication of ceramic materials [256].…”

Section: Brazilian Tribology: Status Quomentioning

confidence: 99%

Brazilian Tribology: origin, status quo and future perspectives

de Mello,

Costa

2023

Surf. Topogr.: Metrol. Prop.

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This first regional issue published in STMP highlights the potential and importance of the research carried out in Latin America regarding surface engineering and tribology. In order to celebrate this important initiative, a complete historical account of Brazilian tribology is presented for the first time. It initiates with the first steps of Brazilian tribology in the 1980s, followed by the evolution and expansion of tribology research both in academic centres and industry. Focus is given to two outstanding achievements of Brazilian tribology: the fully flexible engines that run at any proportion of ethanol and gasoline and a fully innovative, completely oil-less family of hermetic compressors. The status-quo of the current research groups on tribology is described. Finally, the future trends envisaged by the Brazilian tribology community are presented.

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“…In Table , the influences of different types of inclusions on the machinability are summarized from several studies . Recently, a research group attempted to apply a FEM to simulate the behavior of the stainless steel matrix during machining . The simulation was carried out for macroscopic analysis of the matrix and tool, as well as for small areas of the primary shear zone under various conditions of inclusion size, volume fraction, and morphology.…”

Section: Influence Of Inclusions On the Mechanical Properties Of Staimentioning

confidence: 99%

Inclusions in Stainless Steels − A Review

Park

Kang

2017

steel research int.

138

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Due to its superior features compared to plain steel products, stainless steel has been widely used for various applications, since it is commercialized in the beginning of the 1900's. Since stainless steel is characterized by high chromium (and nickel) content, stainless steelmaking processes have been developed differently to those of ordinary steelmaking. However, like plain carbon steels, non-metallic inclusions significantly influence the quality of stainless steel products. In order to gain a better understanding of the impact of inclusions on the characteristics of stainless steel products, information from a large amount of previous research on non-metallic inclusions in stainless steel is reviewed. As expected, non-metallic inclusions are a probable cause of pitting corrosion, as well as crack initiation and growth. The formation and origin of inclusions during the steelmaking and continuous casting processes are also discussed based on a number of relevant studies.[ Ã ] Prof.

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Numerical Model of Machining Considering the Effect of MnS Inclusions in an Austenitic Stainless Steel

Cited by 14 publications

References 8 publications

Orthogonal cut of SPS-sintered composites with ferrous matrix and Fe Mo S particles: Numerical and experimental analysis

Orthogonal cut of SPS-sintered composites with ferrous matrix and Fe Mo S particles: Numerical and experimental analysis

Brazilian Tribology: origin, status quo and future perspectives

Inclusions in Stainless Steels − A Review

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