Alloying and strain hardening effects in abrasive contacts on iron based alloys

Rojacz, H.; Premauer, M.; Varga, M.

doi:10.1016/j.wear.2018.05.022

Cited by 20 publications

(3 citation statements)

References 24 publications

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“…Traditionally, the elemental doping method is usually executed to ameliorate the mechanical properties of metallic materials as well as intermetallics (for instance carbides and borides) [ 25 , 26 , 27 , 28 , 29 , 30 ]. Jian et al [ 29 , 31 ] improved the fracture toughness of Fe 2 B without sacrificing the hardness by appropriate Cr or Mn addition.…”

Section: Introductionmentioning

confidence: 99%

Effects of Doped Elements (Si, Cr, W and Nb) on the Stability, Mechanical Properties and Electronic Structures of MoAlB Phase by the First-Principles Calculation

Jian

Huang

et al. 2020

Materials

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First-principles calculations based on density functional theory (DFT) have been performed to explore the effects of Si, Cr, W, and Nb elements on the stability, mechanical properties, and electronic structures of MoAlB ternary boride. The five crystals, with the formulas of Mo4Al4B4, Mo4Al3SiB4, Mo3CrAl4B4, Mo3WAl4B4, and Mo3NbAl4B4, have been respectively established. All the calculated crystals are thermodynamically stable, according to the negative cohesive energy and formation enthalpy. By the calculation of elastic constants, the mechanical moduli and ductility evolutions of MoAlB with elemental doping can be further estimated, with the aid of B/G and Poisson’s ratios. Si and W doping cannot only enhance the Young’s modulus of MoAlB, but also improve the ductility to some degree. Simultaneously, the elastic moduli of MoAlB are supposed to become more isotropic after Si and W addition. However, Cr and Nb doping plays a negative role in ameliorating the mechanical properties. Through the analysis of electronic structures and chemical bonding, the evolutions of chemical bondings can be disclosed with the addition of dopant. The enhancement of B-B, Al/Si-B, and Al/Si-Mo bondings takes place after Si substitution, and W addition apparently intensifies the bonding with B and Al. In this case, the strengthening of chemical bonding after Si and W doping exactly accounts for the improvement of mechanical properties of MoAlB. Additionally, Si doping can also improve the Debye temperature and melting point of the MoAlB crystal. Overall, Si element is predicted to be the optimized dopant to ameliorate the mechanical properties of MoAlB.

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Section: Introductionmentioning

confidence: 99%

Effects of Doped Elements (Si, Cr, W and Nb) on the Stability, Mechanical Properties and Electronic Structures of MoAlB Phase by the First-Principles Calculation

Jian

Huang

et al. 2020

Materials

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“…At low speed (10 mm/min), a deformed zone of 25 µm thickness can be identified, characterized by grain refinement as visible in the IPF plot. In the near-surface zone, the misorientation remains at a low level <5° grain average misorientation (GAM), which indicates dynamic recrystallization [31,32]. Nevertheless, a certain deformation as well as residual stresses [cf.…”

Section: Microstructure Evolutionmentioning

confidence: 99%

Fundamental abrasive contact at high speeds: Scratch testing in experiment and simulation

Varga

Cervellón

Leroch

et al. 2023

Wear

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“…The different load regimes accessible at AC²T range from mN in nano-scratching [20] up to 500 N in a specially designed scratch tester that also allows high-temperature experiments at up to 1000°C [21]. The present wear mechanisms are analysed after testing by microscopic analyses, topography measurements, and on cross-sections [22]. Using SEM+EBSD, the microstructural changes can be analysed in detail [23].…”

Section: Experimental Simulation Of Abrasionmentioning

confidence: 99%

A Brief Review of Abrasive Wear Modelling Using a Numerical-Experimental Approach

Badisch

Varga

Eder

2019

KEM

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Abrasive wear limits the lifetime of key components and wear parts used in various applications. Damage is caused by indentation of harder particles into the wearing materials and subsequent relative motion resulting in ploughing, cutting, and fracture phenomena. The wear mechanisms depend mainly on the applied materials, loading conditions, and abrasives present in the tribosystem, hence material choice is often a difficult task and requires careful evaluation. For this, a variety of laboratory abrasion tests are available of which the scratch test is discussed in this work as the most fundamental abrasive interaction. For further insight into the acting wear mechanisms and microstructural effects, large-scale molecular dynamics simulations were carried out as well as meso-/macroscopic scratch simulations with the mesh-free Material Point Method. The prediction of abrasive wear is of high relevance for industrial applications. Up to now, no general one-to-one match between field application and lab system is known. Here, a simulation-based transfer of experimentally determined wear rates via a lab-2-field approach enables the prediction of wear rates in real applications.

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Alloying and strain hardening effects in abrasive contacts on iron based alloys

Cited by 20 publications

References 24 publications

Effects of Doped Elements (Si, Cr, W and Nb) on the Stability, Mechanical Properties and Electronic Structures of MoAlB Phase by the First-Principles Calculation

Effects of Doped Elements (Si, Cr, W and Nb) on the Stability, Mechanical Properties and Electronic Structures of MoAlB Phase by the First-Principles Calculation

Fundamental abrasive contact at high speeds: Scratch testing in experiment and simulation

A Brief Review of Abrasive Wear Modelling Using a Numerical-Experimental Approach

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