Intrinsic hardness of constitutive phases in WC–Co composites: Nanoindentation testing, statistical analysis, WC crystal orientation effects and flow stress for the constrained metallic binder

Roa, J.J.; Jiménez-Piqué, Emilio; Verge, C.; Tarragó, J.M.; Mateo, A.; Fair, J.; Llanes, L.

doi:10.1016/j.jeurceramsoc.2015.04.021

Cited by 70 publications

(58 citation statements)

References 36 publications

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“…The main reason behind this is the unique combination of hardness, toughness, and wear resistance they exhibit. It results from their two-phase interpenetrated network as well as the intrinsic properties of the ceramic particles and the metallic binder [1][2][3][4][5]. Many of the referred applications often imply exposure of cemented carbides tools and components to chemically aggressive media including a large variety of corrosive environments, such as lubricants, chemical and petrochemical products, as well as mine-and sea-water (e.g., References [6][7][8][9]).…”

Section: Introductionmentioning

confidence: 99%

Corrosion-Induced Damage and Residual Strength of WC-Co,Ni Cemented Carbides: Influence of Microstructure and Corrosion Medium

Zheng

Fargas

Armelín

et al. 2019

Metals

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The corrosion behavior of cemented carbides with binders of different chemical nature (Co and Ni) and carbides with distinct mean grain size (ultrafine and coarse) was studied. The investigation also included corrosion media (acidic and neutral solutions containing chlorides and an alkaline solution) as experimental variables. Immersion tests were performed to induce corrosion damage in a controlled way. Electrochemical parameters were measured together with a detailed inspection of the corroded surfaces. Microstructural influence on the tolerance to corrosion damage was evaluated in terms of residual strength. Results pointed out that corrosion rates were lower in the alkaline solution. In contrast, acidic media led to higher corrosion rates, especially for cemented carbides with Co regardless the influence of carbide mean grain size. Corrosion damage resulted in strength degradation due to the formation of surface corrosion pits in acidic solution. In neutral and alkaline solutions, much less pronounced effects were determined. Focused Ion Beam (FIB)/ Field Emission Scanning Electron Microscopy (FESEM) results revealed differences in corrosion-induced damage scenario. In acidic solution, corrosion starts at binder pool centers and evolves towards binder/WC interfaces. Meanwhile, corrosion in alkaline solution is initially located at binder/WC interfaces, and subsequently expands into the ceramic particles, developing a microcrack network inside this phase.

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Section: Introductionmentioning

confidence: 99%

Corrosion-Induced Damage and Residual Strength of WC-Co,Ni Cemented Carbides: Influence of Microstructure and Corrosion Medium

Zheng

Fargas

Armelín

et al. 2019

Metals

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“…A recent report on the system has been made by Roa, Jimenez-Pique, Verge, Tarragό et al [35]; see Figure 6. In related work, Roa et al have determined an intermediate kH for the combined deformation of phases [36].…”

Section: Polycrystals Polyphases and Amorphous Phasesmentioning

confidence: 99%

“…Another recent application has been to investigate the strain hardening surrounding Figure 6. Berkovich nanoindentations made within the WC particle and Co binder phases of the composite cermet material [35].…”

Section: Hardness As a Test Probementioning

confidence: 99%

Crystal Indentation Hardness

2017

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Abstract:There is expanded interest in the long-standing subject of the hardness properties of materials. A major part of such interest is due to the advent of nanoindentation hardness testing systems which have made available orders of magnitude increases in load and displacement measuring capabilities achieved in a continuously recorded test procedure. The new results have been smoothly merged with other advances in conventional hardness testing and with parallel developments in improved model descriptions of both elastic contact mechanics and dislocation mechanisms operative in the understanding of crystal plasticity and fracturing behaviors. No crystal is either too soft or too hard to prevent the determination of its elastic, plastic and cracking properties under a suitable probing indenter. A sampling of the wealth of measurements and reported analyses associated with the topic on a wide variety of materials are presented in the current Special Issue.

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“…In addition to ISE, the hardness anisotropy (as shown in Figure 5) has also been widely studied, firstly using macro-and micro-indentation on WC single crystals and later by nanoindentation of WC grains in WC-Co. A list of these works is given in Table 1 [71][72][73][74][75][76][77][78][79][80][81]. In addition to ISE, the hardness anisotropy (as shown in Figure 5) has also been widely studied, firstly using macro-and micro-indentation on WC single crystals and later by nanoindentation of WC grains in WC-Co. A list of these works is given in Table 1 [71][72][73][74][75][76][77][78][79][80][81]. Table 1.…”

Section: Micro/nanoindentationmentioning

confidence: 99%

“…Table 1. Vickers, Knoop, and Berkovich hardnesses reported by various macro-, micro-, and nanoindentation studies on WC single crystals or grains [71][72][73][74][75][76][77][78][79][80][81].…”

Section: Micro/nanoindentationmentioning

confidence: 99%

Small-Scale Mechanical Testing of Cemented Carbides from the Micro- to the Nano-Level: A Review

Naughton-Duszová

Csanádi

Sedlák

et al. 2019

Metals

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In this overview, we summarize the results published to date concerning the small-scale mechanical testing of WC–Co cemented carbides and similar hardmetals, describing the clear trend in the research towards ever-smaller scales (currently at the nano-level). The load-size effect during micro/nanohardness testing of hardmetals and their constituents and the influence of the WC grain orientation on their deformation, hardness, indentation modulus, fracture toughness, and fatigue characteristics are discussed. The effect of the WC grain size/orientation, cobalt content, and testing environment on damage accumulation, wear mechanisms, and wear parameters are summarized. The deformation and fracture characteristics and mechanical properties, such as the yield and compression strength, of WC–Co composites and their individual WC grains at different orientations during micropillar compression tests are described. The mechanical and fracture properties of micro-cantilevers milled from WC–Co hardmetals, single WC grains, and cantilevers containing WC/WC boundaries with differently-oriented WC grains are discussed. The physical background of the deformation and damage mechanisms in cemented carbides at the micro/nano-levels is descri and potential directions for future research in this field are outlined.

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Intrinsic hardness of constitutive phases in WC–Co composites: Nanoindentation testing, statistical analysis, WC crystal orientation effects and flow stress for the constrained metallic binder

Cited by 70 publications

References 36 publications

Corrosion-Induced Damage and Residual Strength of WC-Co,Ni Cemented Carbides: Influence of Microstructure and Corrosion Medium

Corrosion-Induced Damage and Residual Strength of WC-Co,Ni Cemented Carbides: Influence of Microstructure and Corrosion Medium

Crystal Indentation Hardness

Small-Scale Mechanical Testing of Cemented Carbides from the Micro- to the Nano-Level: A Review

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