Agricultural tillage tools are exposed to various forms of wear during operation. Abrasive wear by soil particles is the most important wear form, and the most exposed to it are representatives of ...tools whose working parts are in direct contact with the soil during work - plows, subsoilers, disc harrows, harrows, cultivators, etc. The factors of wear process can be divided into three categories - abrasive soil conditions, tillage tool properties and operational factors. The paper presents a research of the abrasive wear of modified material surfaces (quenched, cladded and boronized) during motion in the mass of soil particles at different speeds and a comparison of their abrasion resistance.
The experiment was focused on comparison of mass loss exhibited by induction-hardened and gas-nitrided samples made of 42CrMo4 steel. The mass loss was caused by abrasive wear, i.e. by motion of the ...abrasive particles. Wear testing was performed with different input parameters (sample velocity and impact angle of abrasive particles and the tested surface). This experiment proceeded with metallographic analysis performed by an optical microscope and by imaging of wear path done by scanning electron microscopy (SEM), to conclude with the statistical analysis of obtained data. The conducted experiment determined that the gas-nitrided samples lost less mass at all levels of input parameters than the induction-hardened samples.
This research investigates protective effects of vapour phase corrosion inhibitors (VpCI) tested in laboratory conditions. Such tests are required to control the production quality and to provide for ...high-quality protection of products during exploitation. There are three different tests run to obtain results on effectiveness of protective effect of VpCIs (Razor Blade Test, Water Drop Test and VIA Test). Each test differs in its defined performance procedure, as well as in evaluation of the obtained results, yet all three tests confirmed that vapour phase corrosion inhibitors provide adequate protection of the material exposed to an aggressive atmosphere. Therefore, it is justified to use vapour corrosion inhibitors as a protection mechanism when designing surface protection technology.
This research focuses on testing of abrasion resistance of boron- and vanadium-based coatings. Coating of samples with vanadium was completed by classic and duplex procedure with previous ...carburization. The samples were abraded by applying the ASTM G65-94 method of „dry sand/rubber wheel“. The greatest wear was recorded on boron- based coating, and the least wear was exhibited by the vanadium-based coating with previous carburization. The dominant form of „zero“ abrasion was determined by analyzing the sample wear traces.
With the current precision of measurements by the ATLAS and CMS experiments, it cannot be excluded that a standard model (SM)-like Higgs boson is a C P violating mixture of C P -even and C P -odd ...states. We explore this possibility here, assuming Higgs boson production in ZZ-fusion, at 1 TeV ILC, with unpolarized beams. The full simulation of SM background and fast simulation of the signal is performed, simulating 8 ab − 1 of data collected with the ILD detector. We demonstrate that the C P mixing angle Ψ C P between scalar and pseudoscalar states can be measured with the statistical uncertainty of 3.8 mrad at 68% CL, corresponding to 1.44 × 10 − 5 for the C P parameter f C P , for the pure scalar state. This is the first result on sensitivity of an e + e − collider to measure f C P in the Higgs production vertex in vector boson fusion. Published by the American Physical Society 2024
With the current precision of measurements by the ATLAS and CMS experiments,
it cannot be excluded that a SM-like Higgs boson is a CP violating mixture of
CP-even and CP-odd states. We explore this ...possibility here, assuming Higgs
boson production in ZZ-fusion, at 1 TeV ILC, with unpolarized beams. The full
simulation of SM background and fast simulation of the signal is performed,
simulating 8 ab$^{-1}$ of data collected with the ILD detector. We demonstrate
that the CP mixing angle $\Psi_{\mathrm{CP}}$ between scalar and pseudoscalar
states can be measured with the statistical uncertainty of 3.8 mrad at 68% CL,
corresponding to 1.44 $\cdot 10^{-5}$ for the CP parameter $f_\mathrm{CP}$, for
the pure scalar state. This is the first result on sensitivity of an
$e^{+}e^{-}$ collider to measure $f_\mathrm{CP}$ in the Higgs production vertex
in vector boson fusion.
The experiment was focused on comparison of mass loss exhibited by induction-hardened and gas-nitrided samples made of 42CrMo4 steel. The mass loss was caused by abrasive wear, i.e. by motion of the ...abrasive particles. Wear testing was performed with different input parameters (sample velocity and impact angle of abrasive particles and the tested surface). This experiment proceeded with metallographic analysis performed by an optical microscope and by imaging of wear path done by scanning electron microscopy (SEM), to conclude with the statistical analysis of obtained data. The conducted experiment determined that the gas-nitrided samples lost less mass at all levels of input parameters than the induction-hardened samples.
This research focuses on testing of abrasion resistance of boron- and vanadium-based coatings. Coating of samples with vanadium was completed by classic and duplex procedure with previous ...carburization. The samples were abraded by applying the ASTM G65-94 method of „dry sand/rubber wheel“. The greatest wear was recorded on boron- based coating, and the least wear was exhibited by the vanadium-based coating with previous carburization. The dominant form of „zero“ abrasion was determined by analyzing the sample wear traces.
