Role of fracture toughness in impact-abrasion wear

Chintha, Appa Rao; Valtonen, Kati; Kuokkala, V-T; Kundu, Saurabh; Peet, M. J.; Bhadeshia, H. K. D. H.

doi:10.1016/j.wear.2019.03.028

Cited by 60 publications

(22 citation statements)

References 34 publications

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“…A more widely accepted notion is the relationship between sliding abrasion resistance and hardness (H); this will be discussed later. Other theories suggest that the elastic modulus (E) and fracture toughness (K 1c ) are material properties which are also important and that a high hardness to elastic modulus ratio or a high H/K 1C ratio are desirable [25][26][27]. However, in this study there was also no clear relationship between the H/E or H/K 1C ratios with the volume loss due to high-angle erosion (Table 3).…”

Section: Direct Impinged Zone (Diz)contrasting

confidence: 53%

Erosion-Corrosion Mechanisms of Engineering Steels in Different NaCl Concentrations

Brownlie

Hodgkiess

Pearson³

et al. 2021

J Bio Tribo Corros

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This study utilises a recently developed, enhanced approach to assess detailed aspects of the corrosive wear behaviour of different steel grades in aqueous slurries containing three NaCl concentrations (0.05%NaCl, 3.5%NaCl and 10%NaCl). Erosion-corrosion testing was conducted using a slurry impingement test rig and damage was quantified using volume loss, potentiodynamic polarisation scans and surface topography. Single- and segmented specimens were adopted to yield the contribution of the degradation mechanisms in the two hydrodynamic zones (directly impinged and surrounding area). The overall material losses from the two zones of the stainless steels were observed to increase with increasing salinity. However, the overall material loss for the low-alloy steel was found to increase from 0.05%NaCl to 3.5%NaCl, before reducing when the salinity was further increased to 10%NaCl. Changes in salinity were observed to have the most effect on the corrosion-enhanced mechanical damage mechanism. The in-house developed technique demonstrated good linkage between single samples and the outer area damage region. However, it also showed that the use of single samples can be less successful when assessing highly turbulent (directly impinged) damage regions.

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Section: Direct Impinged Zone (Diz)contrasting

confidence: 53%

Erosion-Corrosion Mechanisms of Engineering Steels in Different NaCl Concentrations

Brownlie

Hodgkiess

Pearson³

et al. 2021

J Bio Tribo Corros

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show abstract

“…When the impact occurs approximately normal to the surface, the displaced material from the crater is distributed as a lip around the crater, although some material may also be ejected from the sample depending on the energy of the impact. Therefore, impact-abrasion includes chipping and fragmentation besides abrasion damage modes [13]. Figure 2 shows major difference below the abrading surface of abrasion, and impact-abrasion.…”

Section: Abrasion and Impact-abrasionmentioning

confidence: 99%

Metallurgical aspects of steels designed to resist abrasion, and impact-abrasion wear

Chintha

2019

Materials Science and Technology

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Many abrasion resistant steels rely on a martensitic microstructure to ensure hardness, which in general correlates with better wear performance. However, in practice the steel may be subjected to a complex combination of conditions where hardness alone may not be sufficient to ensure tribological performance. This review is a critical assessment of the mechanical and metallurgical parameters that control wear resistance of steel in impact-abrasion conditions, although relevant work dealing with abrasion has also been included. It is found, for example, that fracture toughness and work-hardening behaviour have a role in enhancing the wear resistance of hard steels.

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“…Above this hardness value the wear scar depths increases. Although this trend might be construed to indicate that there is an optimum hardness where repetitive impact wear is at a minimum, the general consensus is that hardness alone is insufficient to correlate with repetitive impact wear resistance [52,53]. Figure 25 exhibits the relationship between the hardness/ elastic modulus (H/E) ratio [54] with the repetitive impact wear scar depth.…”

Section: Relationship With Materials Propertiesmentioning

confidence: 99%

“…Another material property which, together with hardness, is likely to be crucial to the repetitive impact wear resistance of a material is fracture toughness. Chintha et al [52] have shown that, under impact-abrasion conditions, steels with similar hardness, composition and microstructural phases but different fracture toughness behave differently with the steel of higher toughness demonstrating greater resistance to both impact and abrasive wear. Another study by Liu et al [53] demonstrated that high H/K 1C (hardness/ fracture toughness ratio) for bainitic steels could improve their impact-abrasion wear resistance up to a point, after which the wear resistance of the steels decreased due to a lower critical stress for crack formation.…”

Section: Relationship With Materials Propertiesmentioning

confidence: 99%

Experimental Investigation of Engineering Materials under Repetitive Impact with Slurry Conditions

Brownlie

Hodgkiess²,

Galloway

et al. 2020

Tribol Lett

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In some industrial situations, components are subject to repetitive impact in the presence of a slurry. A novel repetitive impact-with-slurry test rig was developed to evaluate the behaviour of a wide range of engineering materials in such conditions. The test materials could be categorised into five main groups – heat treated steels, stainless steels, chromium cast irons, hardfacing coatings and superalloys. Three-dimensional surface topography was used to quantify the depths and volumes of the produced wear scars. Post-test metallurgical examination was also conducted to further evaluate the wear processes. The wear mechanisms could be split into two main groups of materials; ductile materials were observed to plastically deform and hard/brittle materials demonstrated cracking/spalling mechanisms. Hardened martensitic-type materials exhibited the greatest resistance to repetitive impact wear.

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Role of fracture toughness in impact-abrasion wear

Cited by 60 publications

References 34 publications

Erosion-Corrosion Mechanisms of Engineering Steels in Different NaCl Concentrations

Erosion-Corrosion Mechanisms of Engineering Steels in Different NaCl Concentrations

Metallurgical aspects of steels designed to resist abrasion, and impact-abrasion wear

Experimental Investigation of Engineering Materials under Repetitive Impact with Slurry Conditions

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