Impact of fracture toughness on surface properties of PVD coated cold work tool steel

Podgornik, Bojan; Sedlaček, Marko; Čekada, Miha; Jacobson, Staffan; Zajec, B.

doi:10.1016/j.surfcoat.2015.07.021

Cited by 24 publications

(17 citation statements)

References 30 publications

(39 reference statements)

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“…Further drop in hardness (60 HRC; Group A3), in spite of providing high fracture toughness values results in additional 10% drop in load-carrying capacity (L C <2.5 kN). However, when maintaining high hardness level (above 65 HRC) any increase in fracture toughness, obtained by combining conventional heat treatment with deep cryogenic treatment [17,27] will provide better crack initiation and propagation resistance and thus higher load-carrying capacity (Group B1).…”

Section: Effect Of Substrate Hardness and Fracture Toughness On Coatimentioning

confidence: 99%

Properties of Tool Steels and Their Importance When Used in a Coated System

Podgornik¹,

Sedlaček²,

Žužek³

et al. 2020

Coatings

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The introduction of new light-weight high-strength materials, which are difficult to form, increases demands on tool properties, including load-carrying capacity and wear resistance. Tool properties can be improved by the deposition of hard coatings but proper combination and optimization of the substrate properties are required to prepare the tool for coating application. The aim of this paper is to elaborate on tool steel substrate properties correlations, including hardness, fracture toughness, strength and surface quality and how these substrate properties influence on the coating performance. Results show that hardness of the steel substrate is the most influential parameter for abrasive wear resistance and load-carrying capacity, which is true for different types of hard coatings. However, high hardness should also be accompanied by sufficient fracture toughness, especially when it comes to very hard and brittle coatings, thus providing a combination of high load-carrying capacity, good fatigue properties and superior resistance against impact wear. Duplex treatment and formation of a compound layer during nitriding can be used as an additional support interlayer, but its brittleness may result in accelerated coating cracking and spallation if not supported by sufficient core hardness. In terms of galling resistance, even for coated surfaces substrate roughness and topography have major influence when it comes to hard ceramic coatings, with reduced substrate roughness and coating post-polishing providing up to two times better galling resistance.

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Section: Effect Of Substrate Hardness and Fracture Toughness On Coatimentioning

confidence: 99%

Properties of Tool Steels and Their Importance When Used in a Coated System

Podgornik¹,

Sedlaček²,

Žužek³

et al. 2020

Coatings

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show abstract

“…Podgornik [29] showed that application of this treatment for 25 h at À 196°C increases the fracture toughness while maintaining or only marginally reducing the hardness. Das et al [32] reported that SZT carried out at temperatures of À 75, À 125, and À 196°C led to a decrease in fracture toughness compared to conventionally heat-treated samples when they were low-temperature tempered at 210°C for 2 h. The variations in fracture toughness were attributed to the reduction of the retained austenite amount and to the increase in population density of SGCs in the microstructure after SZT.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, a few results have shown how to fix this problem, including pre-cracked round tensile specimens [28,29], pre-cracked flexural specimens [30], and the chevron notch technique [31,32]. The fracture toughness parameter, K IC , determined experimentally and used for the evaluation of the tool steel treatments reflects the real material crack resistance performance.…”

Section: Introductionmentioning

confidence: 99%

The effect of subzero treatment on microstructure, fracture toughness, and wear resistance of Vanadis 6 tool steel

Sobotová

Jurči²,

Dlouhý

2016

Materials Science and Engineering: A

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“…The properties of the substrate material can have a significant influence on the load-bearing capacity of the coating/substrate interface, and it can affect the reduction of coating wear as shown in several papers [13][14][15][16][17][18][19].…”

Section: Resultsmentioning

confidence: 99%

Wear behaviour of TiAlN PVD coating on deep cryogenically treated HSS substrate

Šolić¹,

Schauperl²,

Tropša³

2020

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In this paper, the influence of deep cryogenic treatment of high-speed steel substrate on the hardness, friction coefficient, and wear rate in the dry sliding conditions of the TiAlN coating was investigated. The obtained results show that the substrate properties have a key effect on the properties of the coating-substrate interface, on the mechanical and tribological properties of the coating and consequently, on its behaviour in dry sliding wear conditions.

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Impact of fracture toughness on surface properties of PVD coated cold work tool steel

Cited by 24 publications

References 30 publications

Properties of Tool Steels and Their Importance When Used in a Coated System

Properties of Tool Steels and Their Importance When Used in a Coated System

The effect of subzero treatment on microstructure, fracture toughness, and wear resistance of Vanadis 6 tool steel

Wear behaviour of TiAlN PVD coating on deep cryogenically treated HSS substrate

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