Journal ArticleDOI
Microscopic investigation of surface layers on rails
Yvonna Jirásková,Jiří Svoboda,O. Schneeweiss,Werner Daves,Franz Dieter Fischer,Franz Dieter Fischer +5 more
Reads0
Chats0
TLDR
In this article, the phase composition and micro-structure of rail specimens at the surface and in the bulk were analyzed using optical (OM), transmission electron (TEM) and atomic force microscopy (AFM) measurements.About:
This article is published in Applied Surface Science.The article was published on 2005-01-15. It has received 43 citations till now. The article focuses on the topics: Severe plastic deformation & Shearing (physics).read more
Citations
More filters
Journal ArticleDOI
CONFIT: Mössbauer spectra fitting program
Tomáš Žák,Yvonna Jirásková +1 more
TL;DR: In this paper, a nonlinear least-squares procedure with the Fast Fourier Transform (FFT) technique is applied for complex processing of 57Fe and 119mSn Mossbauer spectra.
Journal ArticleDOI
White layer formation due to phase transformation in orthogonal machining of AISI 1045 annealed steel
TL;DR: In this article, it is shown that the white layer formed during machining of steels is caused primarily by a thermally induced phase transformation resulting from rapid heating and quenching, but no attempt was made to actually measure the temperatures produced at the tool flank-workpiece interface and correlate it with microstructural evidence of phase transformation.
Journal ArticleDOI
Early stages of rail squat formation and the role of a white etching layer
TL;DR: In this article, the authors describe detailed observations of cracks at a site where no white etching layer was evident, and identify three stages of squat formation: early stage of crack initiation due to a white etch layer or ratcheting, and then growth of a subsurface crack leading to formation of a squat, caused by entrapped water inside the crack, and finally spalling off of a piece of rail surface.
Journal ArticleDOI
Sliding wear behaviour of laser surface modified pearlitic rail steel
TL;DR: In this article, the influence of laser surface modification on sliding wear performance of a pearlitic rail steel (used in Indian railways) under two different conditions, namely, laser hardening (without any melting involved) and laser melting (with thin surface layer melting), has been studied under laboratory conditions.
Journal ArticleDOI
Surface damage on new AS60 rail caused by wheel slip
TL;DR: In this article, a metallurgical investigation was carried out of new AS60 rail samples, subjected to severe wheel slip, which caused skid marks on the rail crown, 10-18mm wide.
References
More filters
Journal ArticleDOI
Nanostructure formation on the surface of railway tracks
Witold Lojkowski,Witold Lojkowski,M. Djahanbakhsh,G. Bürkle,Stanislaw Gierlotka,W. Zieliński,Hans-Jörg Fecht +6 more
TL;DR: In this paper, it is shown that the surface layer of a railway track transforms during exploitation into a nanocrystalline Fe-C alloy and the mechanism of the nanostructure formation is discussed.
Journal ArticleDOI
Review on rail corrugation studies
TL;DR: In this article, the authors reviewed the studies on corrugation in the past and those carried out now in the world and more precisely in Japan, focusing on bibliographies, attempts in the 1970s, classification of rail corrugations, short-pitch Corrugation, and studies in Japan in recent years.
Journal ArticleDOI
Investigation of white etching layers on rails by optical microscopy, electron microscopy, X-ray and synchrotron X-ray diffraction
TL;DR: In this article, a cross-sectional transmission electron microscopy (XTEM) and synchroton X-ray diffraction line profiles were used to determine dislocation densities of the order of 10 12 cm −2 and residual compressive stresses of about 200 MPa.
Journal ArticleDOI
Determination of temperatures for sliding contact with applications for wheel-rail systems
Klaus Knothe,S. Liebelt +1 more
TL;DR: In this paper, the Laplace transforms and the method of Green's functions were used to analyze the contact temperatures and temperature fields of components in relative sliding motion, and it was shown that each kind of fluctuation causes a rise of the maximum contact temperature.
Journal ArticleDOI
A comparison of analytical and numerical methods for the calculation of temperatures in wheel/rail contact
Martin Ertz,Klaus Knothe +1 more
TL;DR: In this paper, the maximum surface temperature during rolling contact of railway wheels with sliding friction can be estimated using Blok's flash temperature formula, and an efficient approach is proposed for Hertzian contact.