Nanostructural evolution of hard turning layers in response to insert geometry, cutting parameters and material microstructure

Bedekar, Vikram; Shivpuri, Rajiv; Chaudhari, Rahul; Hyde, R. Scott

doi:10.1016/j.cirp.2013.03.090

Cited by 24 publications

(15 citation statements)

References 12 publications

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“…Two insert geometries: À208 rake with 50 mm hone (NH) and +58 rake with 12 mm hone (UP) were used at two speeds -91 m/min and 273 m/min. Details of the hard turning setup conditions, TEM foil preparation and glancing angle XRD (GAXRD) setup are discussed elsewhere [2].…”

Section: Methodsmentioning

confidence: 99%

“…In a previous paper [2], the authors studied the effects of process conditions on nanograin size, thermal transformation and nanohardness using carburized steel with 30% retained austenite. It was found that depending on the machining parameters and tool geometries, the machined surface experienced either plastically dominated or thermally dominated mechanisms that significantly altered its structural and mechanical state.…”

Section: Introductionmentioning

confidence: 99%

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Transmission Kikuchi Diffraction study of texture and orientation development in nanostructured hard turning layers

et al. 2015

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transmission Kikuchi Diffraction study of texture and orientation development in nanostructured hard turning layers

et al. 2015

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“…The experimental data used for the analysis refer to those performed by Bedekar et al [23] on hard turning of carburized SAE 8620 steel.…”

Section: Methodsmentioning

confidence: 99%

“…All experiments were carried out at constant depth of cut (DOP=100µm) and feed rate (f=50µm). Finally, the authors [23] analyzed microstructural changes by TEM and GAXRD and evaluated the nanohardness by nanoindentation tests.…”

Section: Methodsmentioning

confidence: 99%

Finite Element Modeling of Microstructural Changes in Hard Machining of SAE 8620

et al. 2019

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Surface and subsurface microstructural characterization after machining operations is a topic of great interest for both academic and industrial research activities. This paper presents a newly developed finite element (FE) model able to describe microstructural evolution and dynamic recrystallization (DRX) during orthogonal hard machining of SAE 8620 steel. In particular, it predicts grain size and hardness variation by implementing a user subroutine involving a hardness-based flow stress and empirical models. The model is validated by comparing its output with the experimental results available in literature at varying the cutting speed, insert geometry and flank wear. The results show a good ability of the customized model to predict the thermo-mechanical and microstructural phenomena taking place during the selected processes.

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“…investigated the effects of hard turning on the evolutions of carburized steels by performing transmission electron microscopy measurements. In addition to the observed changes in the average grain size (due to recrystallization and growth) as a function of cutting velocity, the observed phase transformation was also related to process parameters [7]. In a related study, the static effects of machining on the microstructure, caused by residual stresses and their effects on phase transformation in steel were experimentally studied [8].…”

mentioning

confidence: 98%

Micro-Texture Evolution in Aggressive Machining of Al Alloy 7075

Tabei

Shih

Garmestani

et al. 2015

Materials and Manufacturing Processes

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The effects of process parameters on micro-texture evolution of Al alloy 7075 in machining under extreme conditions were investigated. For the first time, the process parameters in machining are related to the micro-texture evolution below the machined surface, through a computational modeling framework verified by robust experimentation. Finite element analyses were performed to obtain the mechanical loads that the material experiences due to chip removal. Viscoplastic self-consistent (VPSC) approach was used to follow the evolution in texture due to the applied loads. The most outstanding texture component, which was seen in the case of increased feed rate, is closely followed by the texture evolution model. The observed discrepancy in experimental and computational results of texture evolution in a few studied cases is believed to be due to the activation of other microstructural evolution phenomena; than dislocation slip, as a result of the ultra-high levels of exerted strain and strain rates to the machined surface.

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Nanostructural evolution of hard turning layers in response to insert geometry, cutting parameters and material microstructure

Cited by 24 publications

References 12 publications

Transmission Kikuchi Diffraction study of texture and orientation development in nanostructured hard turning layers

Transmission Kikuchi Diffraction study of texture and orientation development in nanostructured hard turning layers

Finite Element Modeling of Microstructural Changes in Hard Machining of SAE 8620

Micro-Texture Evolution in Aggressive Machining of Al Alloy 7075

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