Incipient straining in severe plastic deformation methods

Du, Fei; Yadav, Sarita; Moreno, César; Murthy, Tejas G.; Saldaña, Christopher

doi:10.1557/jmr.2014.26

Cited by 9 publications

(2 citation statements)

References 28 publications

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“…Material flow was imaged using a high-speed digital camera (PCO Dimax) and corresponding displacement fields were determined using a digital image correlation (DIC) algorithm. From these measurements, the deformation in terms of strain rate fields, strain fields and rotation fields was evaluated, following the method described in [21]. The resulting deformation histories were coupled with the visco-plastic self-consistent (VPSC) framework to simulate evolution of crystallographic textures, as is described in the ensuing sections.…”

Section: Experimental Methodsmentioning

confidence: 99%

Deformation heterogeneity and texture in surface severe plastic deformation of copper

2016

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Comprehensive understanding of thermomechanical response and microstructure evolution during surface severe plastic deformation (S 2 PD) is important towards establishing controllable processing frameworks. In this study, the evolution of crystallographic textures during directional surface mechanical attrition treatment on copper was studied and modelled using the visco-plastic self-consistent framework. In situ high-speed imaging and digital image correlation of surface deformation in circular indentation were employed to elucidate mechanics occurring in a unit process deformation and to calibrate texture model parameters. Material response during directional surface mechanical attrition was simulated using a finite-element model coupled with the calibrated texture model. The crystallographic textures developed during S 2 PD were observed to be similar to those resultant from uniaxial compression. The implications of these results towards facilitating a processing-based framework to predict deformation mechanics and resulting crystallographic texture in S 2 PD configurations are briefly discussed.

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Section: Experimental Methodsmentioning

confidence: 99%

Deformation heterogeneity and texture in surface severe plastic deformation of copper

2016

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“…In CM, the primary deformation zone evolves over a finite length of the cutting into its steady-state configuration often idealized as a shear plane. During this evolution, the deformation is in a transient or incipient stage, wherein the forces and chip strain are usually different than in the steady-state condition [12,19,20]. The discrete chip formation in MAM can be thought of as a periodic repetition of this transient stage of CM.…”

Section: Introductionmentioning

confidence: 99%

Effect of Low-Frequency Modulation on Deformation and Material Flow in Cutting of Metals

Yeung

Guo

Mann

et al. 2015

Journal of Tribology

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The deformation field, material flow, and mechanics of chip separation in cutting of metals with superimposed low-frequency modulation (<1000 Hz) are characterized at the mesoscale using high-speed imaging and particle image velocimetry (PIV). The two-dimensional (2D) system studied involves a sharp-wedge sliding against the workpiece to remove material, also reminiscent of asperity contacts in sliding. A unique feature of the study is in situ mapping of material flow at high resolution using strain fields and streaklines and simultaneous measurements of tool motions and forces, such that instantaneous forces and kinematics can be overlaid onto the chip formation process. The significant reductions in specific energy obtained when cutting with modulation are shown to be a consequence of discrete chip formation with reduced strain levels. This strain reduction is established by direct measurements of deformation fields. The results have implications for enhancing sustainability of machining processes and understanding surface deformation and material removal in wear processes.

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Analytical and experimental investigation of improved burr morphology prediction at the top edge in metal machining

Pang

Zhang

Yin

et al. 2020

Int J Adv Manuf Technol

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Incipient straining in severe plastic deformation methods

Abstract: Abstract

Cited by 9 publications

References 28 publications

Deformation heterogeneity and texture in surface severe plastic deformation of copper

Deformation heterogeneity and texture in surface severe plastic deformation of copper

Effect of Low-Frequency Modulation on Deformation and Material Flow in Cutting of Metals

Analytical and experimental investigation of improved burr morphology prediction at the top edge in metal machining

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