A Review of Parameters Influencing Some Mechanical Properties of Tungsten Carbide–cobalt Alloys

Exner, Hans Eckart; Gurland, J.

doi:10.1179/pom.1970.13.25.002

Cited by 174 publications

(73 citation statements)

References 19 publications

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“…Crack propagation induces a local stress release. This aspect is in a good agreement with the fineness of the fragments reported in [53][54][55][56][57][58][59][60][61][62][63][64].…”

Section: Hard Metals: Overview and Some Propertiessupporting

confidence: 92%

“…[6,55,56], WC-Co hard metals, developed from an ultrafine or nanograined particles, show superior hardness compared to their coarser-grained based ones, while Lankford [57] indicates that the compressive strength of these hard metals increases when binder contents decreases. The influence of the loading rate on the compressive strength of WC-Co hard metal is illustrated in [52] as a function of Co content and the authors found that the fragments results to be finer after compressive loading with increasing strain rate and as Co content decreases, the compressive strength increases due to the increasing level of failure which is characterized by crack initiations, typical features for brittle material.…”

Section: Hard Metals: Overview and Some Propertiesmentioning

confidence: 99%

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Manufacturing, Composition, Properties and Application of Sintered Hard Metals

Peter¹,

Rosso²

2017

Powder Metallurgy - Fundamentals and Case Studies

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Among other materials, hard metals represent an important family of functional materials. They show properties that are combinations of those of their constituents. The general idea while using hard metals is to exploit their excellent properties in terms of hardness, toughness, wear resistance, and chemical stability. These characteristics made hard metals as promising candidate for use as a cutting tool, which constitutes their main area of application. Depending on the particular use, the most important properties can be achieved: (i) by properly selecting the constituents made up the whole composition, (ii) by varying the relative composition of the phases, or (iii) by applying a suitable hard metal coating layer on the top of the cutting tool. This chapter presents a general overview of the actual scenario concerning different tool materials, including a short history and description of state-of-the-art techniques as regards their composition, their manufacturing routes and their most important properties. Some results of the own research in this field are carried out during the years will integrate this part.

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“…Crack propagation induces a local stress release. This aspect is in a good agreement with the fineness of the fragments reported in [53][54][55][56][57][58][59][60][61][62][63][64].…”

Section: Hard Metals: Overview and Some Propertiessupporting

confidence: 92%

Section: Hard Metals: Overview and Some Propertiesmentioning

confidence: 99%

Manufacturing, Composition, Properties and Application of Sintered Hard Metals

Peter¹,

Rosso²

2017

Powder Metallurgy - Fundamentals and Case Studies

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“…[18][19][20] As mentioned in chapter 3.2, TRS has a substantial increase after the addition of 2.5 mass% seeds. The increase of WC grain size brings about the increase of TRS to a certain degree.…”

Section: 2mentioning

confidence: 99%

Hardening and Toughening Mechanisms of Cemented Carbides with Plate-Like WC Grains Prepared by Seeding

Liu

Zhu

2011

Mater. Trans.

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WC-10Co (mass pct.) cemented carbides containing plate-like WC grains were prepared by using plate-like WC single crystals as seeds. With the increase of seed addition amount, more and bigger plate-like WC grains are formed, the hardness and transverse rupture strength (TRS) increase first and then decrease. When 2.5 mass% seeds are added in WC-10Co, the density is hardly affected, whereas the hardness and TRS increase simultaneously, especially TRS increases by 12.8%. The hardening and toughening mechanisms of WC-10Co cemented carbides with plate-like WC grains were discussed.

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“…1)3) Functionally graded material (FGM) WCCo is a class of these composites combines two or more irreconcilable properties in the same component, for instance, hardness and fracture toughness. 4)6) Generally, hardness and wear resistance are often improved at the expense of the fracture toughness, Meanwhile, the multi-layered structure is a possible solution used to improve them all in the same component.…”

Section: Introductionmentioning

confidence: 99%

Enhancing stability of Co gradient in nano-structured WC–Co functionally graded composites using graphene additives

Nasser

Shinagawa

El-Hofy

et al. 2016

J. Ceram. Soc. Japan

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A new approach for stabilizing a predesigned Co gradient in the microstructure of nano WCCo thinning structure via graphene additions is presented. For this purpose, laminated specimens of green WCCo functionally graded material, having three layers structured, with and without graphene additions in the intermediate layer were sintered at solid and liquid sintering temperatures of 1290 and 1400°C, respectively, using the hot isostatic pressing technique (HIP). With graphene additions, the mean average grain size of WC matrix phase is reduced, a new inter-phase layer is created and the amplitude of predesigned Co gradient, which had lost during liquid phase sintering of graphene-free WCCo composite, is maintained through the cross section of the predesigned structure. As a consequence, the liquid state sintered specimens containing graphene show better hardness to toughness relationships compared to the graphene-free specimens fabricated under the same processing conditions. Such improvements are attributed to the extraordinary thermo-mechanical properties of graphene, and its beneficial role in grain refinement and creation of inter-phase layer that enables the stabilization of the predesigned Co-gradient.

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A Review of Parameters Influencing Some Mechanical Properties of Tungsten Carbide–cobalt Alloys

Abstract: The paper reviews experimental results relating to the influence of composition, structure, and testing conditions on the hardness, compressive strength, and transverse rupture strength of sintered tungsten carbide-cobalt alloys.

Cited by 174 publications

References 19 publications

Manufacturing, Composition, Properties and Application of Sintered Hard Metals

Manufacturing, Composition, Properties and Application of Sintered Hard Metals

Hardening and Toughening Mechanisms of Cemented Carbides with Plate-Like WC Grains Prepared by Seeding

Enhancing stability of Co gradient in nano-structured WC–Co functionally graded composites using graphene additives

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A Review of Parameters Influencing Some Mechanical Properties of Tungsten Carbide–cobalt Alloys

Abstract: The paper reviews experimental results relating to the influence of composition, structure, and testing conditions on the hardness, compressive strength, and transverse rupture strength of sintered tungsten carbide-cobalt alloys.

Cited by 174 publications

References 19 publications

Manufacturing, Composition, Properties and Application of Sintered Hard Metals

Manufacturing, Composition, Properties and Application of Sintered Hard Metals

Hardening and Toughening Mechanisms of Cemented Carbides with Plate-Like WC Grains Prepared by Seeding

Enhancing stability of Co gradient in nano-structured WC&ndash;Co functionally graded composites using graphene additives

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Product

Resources

About

Enhancing stability of Co gradient in nano-structured WC–Co functionally graded composites using graphene additives