On plastic deformation mechanisms of WC–15wt% Co alloys at 1000°C

Han, X.; Sacks, Natasha; Milman, Yu.V.; Luyckx, S.

doi:10.1016/j.ijrmhm.2008.09.021

Cited by 13 publications

(7 citation statements)

References 12 publications

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“…in WC grains are in good agreement with the results of literature [19,20,33]. Furthermore, such intragranular phenomena can initiate microcracks.…”

Section: Stagesupporting

confidence: 92%

“…Consequently, high temperature and severe friction phenomena at tool surfaces deeply modify the mechanical, chemical and thermo-physical properties and can change microstructure of WC-6Co [19][20][21][22][23][24][25]. For example Han et al [19] show that for temperatures up to 1000°C, the WC-6Co has a strongly visco-plastic behavior and the accumulation of plastic deformation can reach 5%. These observations were confirmed by Östberg et al [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Microstructural analysis of wear micromechanisms of WC–6Co cutting tools during high speed dry machining

Kagnaya¹,

Boher²,

Lambert³

et al. 2014

International Journal of Refractory Metals and Hard Materials

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This original study investigates the damages of WC-6Co uncoated carbide tools during dry turning of AISI 1045 steel at mean and high speeds. The different wear micromechanisms are explained on the basis of different microstructural observations and analyses made by different techniques: (i) optical microscopy (OM) at macro-scale, (ii) scanning electron microscopy (SEM), with back-scattered electron imaging (BSE) at micro-scale, (iii) energy dispersive spectroscopy (EDS), X ray mapping with wavelength dispersive spectroscopy (WDS) for the chemical analyses and (iv) temperature evolution during machining. We noted that at conventional cutting speed Vc ≤ 250 m/min, normal cutting tool wear types (adhesion, abrasion and built up edge) are clearly observed. However, for cutting speed Vc N 250 m/min a severe wear is observed because the behavior of the WC-6Co grade completely changes due to a severe thermomechanical loading. Through all SEM micrographs, it is observed that this severe wear consists of several steps as: excessive deformation of WC-6Co bulk material and binder phase (Co), deformation and intragranular microcracking of WC, WC grain fragmentation and production of WC fragments in the tool/chip contact. Thus, the WC fragments accumulated at the tool/chip interface cause abrasion phenomena and pullout WC from tool surface. WC fragments contribute also to the microcutting and microploughing of chips, which lead to form a transferred layer at the tool rake face. Finally, based on the observations of the different wear micromechanisms, a scenario of WC-6Co damages is proposed through to a phenomenological model.

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“…in WC grains are in good agreement with the results of literature [19,20,33]. Furthermore, such intragranular phenomena can initiate microcracks.…”

Section: Stagesupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Microstructural analysis of wear micromechanisms of WC–6Co cutting tools during high speed dry machining

Kagnaya¹,

Boher²,

Lambert³

et al. 2014

International Journal of Refractory Metals and Hard Materials

View full text Add to dashboard Cite

show abstract

“…Most studies have focussed on room temperature deformation properties, and only a few studies are available on high temperature deformation of WC [15,[32][33][34][35][36]. All of these have used indentation to study the degree of mechanical softening at elevated temperatures.…”

Section: Slip Systems and Dislocation Types Reported In Literaturementioning

confidence: 99%

Micropillar compression of single crystal tungsten carbide, Part 1: Temperature and orientation dependence of deformation behaviour

Jones¹,

Tong²,

Ramachandramoorthy³

et al. 2022

International Journal of Refractory Metals and Hard Materials

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“…The data presented above show that there is a general consensus on the fact that the mechanical behavior of the cermets can be divided into three temperature zones: a fragile zone (zone I), a tough and limited deformation zone (zone II) and a strong deformation zone (zone III) that affects the strain at fracture (Han, Sacks, Milman, & Luyckx, 2009;Mari et al, 1999;Milman et al, 2002).…”

Section: Deformation Of Cemented Carbides: General Discussionmentioning

confidence: 99%

Mechanical Behavior of Hardmetals at High Temperature

Mari

2014

Comprehensive Hard Materials

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On plastic deformation mechanisms of WC–15wt% Co alloys at 1000°C

Cited by 13 publications

References 12 publications

Microstructural analysis of wear micromechanisms of WC–6Co cutting tools during high speed dry machining

Microstructural analysis of wear micromechanisms of WC–6Co cutting tools during high speed dry machining

Micropillar compression of single crystal tungsten carbide, Part 1: Temperature and orientation dependence of deformation behaviour

Mechanical Behavior of Hardmetals at High Temperature

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