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#1T. Kato (Nippon Steel)H-Index: 1
#2T. Fujimura (Nippon Steel)
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Abstract Rolling contact fatigue failure is one of the very common causes for the replacement of heavy haul car wheels. There are two crack initiation modes in rolling contact fatigue failures, which are surface and subsurface crack initiation modes. Internal defects such as voids and non–metallic inclusions are known to be the possible origins of subsurface cracks. In this study, torsion and axial fatigue tests are conducted on railway wheel steel with artificial defects, and finite element ana...
#1Iyas KhaderH-Index: 6
#2Dominik KürtenH-Index: 2
Last.Andreas KailerH-Index: 13
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Abstract A coupled diffusion-mechanical finite element simulation model was developed to study the diffusion of hydrogen in a cylindrical roller thrust bearing (CRTB). The simulations enabled obtaining qualitative information pertaining to stress-assisted diffusion in tribological loading and under the influence of residual stresses. The mechanical behavior of bearing steel was obtained from experiments and supported by literature. In parallel, rolling-contact fatigue (RCF) tests on CRTBs lubric...
#1Wilhelm KubinH-Index: 3
#2Werner DavesH-Index: 13
Last.Richard StockH-Index: 5
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Abstract The maintenance process rail milling and the rolling contact behavior of a milled rail are analyzed in detail. By using commercial finite element programs the milling process and the rolling-sliding contact of a wheel on a milled rail are simulated with 3D and 2D methods. These results are compared to experimental results and metallographic investigations of a milled rail after an actual milling process and after milling tests that were done in track together with a European infrastruct...
#1Alix de Pannemaecker (McGill University)
#2Helmi Attia (McGill University)H-Index: 11
Last.Gary T. Williams (Areva)
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Abstract In nuclear power plants, wear of steam generators, fuel rods and assemblies can have serious economic and safety impact. To reproduce realistic oscillatory fretting wear in laboratory, a novel accelerated random vibration fretting wear test methodology, using Gaussian excitations, is proposed. A new experimental device and protocol were also developed, enabling controlled fretting damage under random excitations. The tests were performed on a nickel-based alloy 718 and a proprietary Zr–...
#1Mohd Hafis Bin Sulaiman (UniMAP: Universiti Malaysia Perlis)H-Index: 2
#2R.N. Farahana (UniMAP: Universiti Malaysia Perlis)
Last.Niels Bay (DTU: Technical University of Denmark)H-Index: 32
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Abstract Experimental and numerical analyses were conducted to explore the influence of DLC/TiAlN-coated die surfaces in sheet-metal forming under dry and oil-lubricated conditions. In this study, ironing and deep-drawing experiments were performed to determine the potential of the DLC/TiAlN coating in the sheet forming of stainless steels under different tribological conditions. The performance and physical properties of the DLC/TiAlN-coated die surface were obtained through load, surface rough...
#1Somrita Dhar (DTU: Technical University of Denmark)H-Index: 1
#2Hilmar Kjartansson Danielsen (DTU: Technical University of Denmark)H-Index: 15
Last.D. Juul Jensen (DTU: Technical University of Denmark)H-Index: 37
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Abstract Switches and crossings in rail networks suffer from complex loading which may induce severe damage and defects, including formation of cracks that can result in rail breakage. This paper focuses on the microstructure and crack network in a damaged Hadfield manganese steel crossing nose. The extent of deformation has been quantified by hardness measurements, optical microscopy and scanning electron microscopy (SEM) including electron back scattering diffraction (EBSD). It is found that t...
#1Piotr Kostencki (West Pomeranian University of Technology)H-Index: 2
#2Tomasz Stawicki (West Pomeranian University of Technology)H-Index: 2
Last.Paweł Sędłak (West Pomeranian University of Technology)H-Index: 2
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Abstract Three constructional solutions of coulters used in cultivators were assessed with regard to their wear resistance in soil. The coulters were installed on a four-beam cultivator used for cultivation of loamy-sandy soils with humidity typical for the summer season. It was found that the amount of thickness reduction of the coulters in the areas with cemented-carbide plates and padding welds was lower than that in the base-material areas. It was also found that the amount of wear of the co...
#1Magnus Heldin (Uppsala University)
#2Urban Wiklund (Uppsala University)H-Index: 22
Abstract Groundwood pulping is an industrial process with a high energy demand, although only a minor part of the energy is used for actually separating the fibres and the rest for working them. Traditionally, the separation process employs a grinding stone having particles embedded in a softer matrix. The position and distribution of the particles have been random, causing their interaction with the wood to also be random. This makes studies of the mechanisms during the separation process diffi...
#1Alexey Anatolevich Vereschaka (Moscow State Technological University)H-Index: 13
#2Vladimir Tabakov (Ulyanovsk State Technical University)H-Index: 3
Last.Jury I. BublikovH-Index: 2
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Abstract The article considers the wear pattern for the rake face of a cutting tool with the Cr–CrN-(Ti,Cr,Al,Si)N multilayer composite nanostructured coating in turning 1045 steel at vc = 300 m/min. Attention was paid to the diffusion and oxidation processes and effect of high temperature because these wear factors prevailed at high cutting speeds. Studies were conducted using a high-resolution transmission electron microscope and energy-dispersive X-ray spectroscopy. The study of the wear-crat...
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